Merge remote branch 'smcv/ready/link-types'
[ikiwiki.git] / IkiWiki.pm
1 #!/usr/bin/perl
2
3 package IkiWiki;
4
5 use warnings;
6 use strict;
7 use Encode;
8 use HTML::Entities;
9 use URI::Escape q{uri_escape_utf8};
10 use POSIX ();
11 use Storable;
12 use open qw{:utf8 :std};
13
14 use vars qw{%config %links %oldlinks %pagemtime %pagectime %pagecase
15             %pagestate %wikistate %renderedfiles %oldrenderedfiles
16             %pagesources %destsources %depends %depends_simple %hooks
17             %forcerebuild %loaded_plugins %typedlinks %oldtypedlinks};
18
19 use Exporter q{import};
20 our @EXPORT = qw(hook debug error template htmlpage deptype
21                  add_depends pagespec_match pagespec_match_list bestlink
22                  htmllink readfile writefile pagetype srcfile pagename
23                  displaytime will_render gettext ngettext urlto targetpage
24                  add_underlay pagetitle titlepage linkpage newpagefile
25                  inject add_link
26                  %config %links %pagestate %wikistate %renderedfiles
27                  %pagesources %destsources %typedlinks);
28 our $VERSION = 3.00; # plugin interface version, next is ikiwiki version
29 our $version='unknown'; # VERSION_AUTOREPLACE done by Makefile, DNE
30 our $installdir='/usr'; # INSTALLDIR_AUTOREPLACE done by Makefile, DNE
31
32 # Page dependency types.
33 our $DEPEND_CONTENT=1;
34 our $DEPEND_PRESENCE=2;
35 our $DEPEND_LINKS=4;
36
37 # Optimisation.
38 use Memoize;
39 memoize("abs2rel");
40 memoize("pagespec_translate");
41 memoize("template_file");
42
43 sub getsetup () {
44         wikiname => {
45                 type => "string",
46                 default => "wiki",
47                 description => "name of the wiki",
48                 safe => 1,
49                 rebuild => 1,
50         },
51         adminemail => {
52                 type => "string",
53                 default => undef,
54                 example => 'me@example.com',
55                 description => "contact email for wiki",
56                 safe => 1,
57                 rebuild => 0,
58         },
59         adminuser => {
60                 type => "string",
61                 default => [],
62                 description => "users who are wiki admins",
63                 safe => 1,
64                 rebuild => 0,
65         },
66         banned_users => {
67                 type => "string",
68                 default => [],
69                 description => "users who are banned from the wiki",
70                 safe => 1,
71                 rebuild => 0,
72         },
73         srcdir => {
74                 type => "string",
75                 default => undef,
76                 example => "$ENV{HOME}/wiki",
77                 description => "where the source of the wiki is located",
78                 safe => 0, # path
79                 rebuild => 1,
80         },
81         destdir => {
82                 type => "string",
83                 default => undef,
84                 example => "/var/www/wiki",
85                 description => "where to build the wiki",
86                 safe => 0, # path
87                 rebuild => 1,
88         },
89         url => {
90                 type => "string",
91                 default => '',
92                 example => "http://example.com/wiki",
93                 description => "base url to the wiki",
94                 safe => 1,
95                 rebuild => 1,
96         },
97         cgiurl => {
98                 type => "string",
99                 default => '',
100                 example => "http://example.com/wiki/ikiwiki.cgi",
101                 description => "url to the ikiwiki.cgi",
102                 safe => 1,
103                 rebuild => 1,
104         },
105         cgi_wrapper => {
106                 type => "string",
107                 default => '',
108                 example => "/var/www/wiki/ikiwiki.cgi",
109                 description => "filename of cgi wrapper to generate",
110                 safe => 0, # file
111                 rebuild => 0,
112         },
113         cgi_wrappermode => {
114                 type => "string",
115                 default => '06755',
116                 description => "mode for cgi_wrapper (can safely be made suid)",
117                 safe => 0,
118                 rebuild => 0,
119         },
120         rcs => {
121                 type => "string",
122                 default => '',
123                 description => "rcs backend to use",
124                 safe => 0, # don't allow overriding
125                 rebuild => 0,
126         },
127         default_plugins => {
128                 type => "internal",
129                 default => [qw{mdwn link inline meta htmlscrubber passwordauth
130                                 openid signinedit lockedit conditional
131                                 recentchanges parentlinks editpage}],
132                 description => "plugins to enable by default",
133                 safe => 0,
134                 rebuild => 1,
135         },
136         add_plugins => {
137                 type => "string",
138                 default => [],
139                 description => "plugins to add to the default configuration",
140                 safe => 1,
141                 rebuild => 1,
142         },
143         disable_plugins => {
144                 type => "string",
145                 default => [],
146                 description => "plugins to disable",
147                 safe => 1,
148                 rebuild => 1,
149         },
150         templatedir => {
151                 type => "string",
152                 default => "$installdir/share/ikiwiki/templates",
153                 description => "location of template files",
154                 advanced => 1,
155                 safe => 0, # path
156                 rebuild => 1,
157         },
158         templatedirs => {
159                 type => "internal",
160                 default => [],
161                 description => "additional directories containing template files",
162                 safe => 0,
163                 rebuild => 0,
164         },
165         underlaydir => {
166                 type => "string",
167                 default => "$installdir/share/ikiwiki/basewiki",
168                 description => "base wiki source location",
169                 advanced => 1,
170                 safe => 0, # path
171                 rebuild => 0,
172         },
173         underlaydirbase => {
174                 type => "internal",
175                 default => "$installdir/share/ikiwiki",
176                 description => "parent directory containing additional underlays",
177                 safe => 0,
178                 rebuild => 0,
179         },
180         wrappers => {
181                 type => "internal",
182                 default => [],
183                 description => "wrappers to generate",
184                 safe => 0,
185                 rebuild => 0,
186         },
187         underlaydirs => {
188                 type => "internal",
189                 default => [],
190                 description => "additional underlays to use",
191                 safe => 0,
192                 rebuild => 0,
193         },
194         verbose => {
195                 type => "boolean",
196                 example => 1,
197                 description => "display verbose messages?",
198                 safe => 1,
199                 rebuild => 0,
200         },
201         syslog => {
202                 type => "boolean",
203                 example => 1,
204                 description => "log to syslog?",
205                 safe => 1,
206                 rebuild => 0,
207         },
208         usedirs => {
209                 type => "boolean",
210                 default => 1,
211                 description => "create output files named page/index.html?",
212                 safe => 0, # changing requires manual transition
213                 rebuild => 1,
214         },
215         prefix_directives => {
216                 type => "boolean",
217                 default => 1,
218                 description => "use '!'-prefixed preprocessor directives?",
219                 safe => 0, # changing requires manual transition
220                 rebuild => 1,
221         },
222         indexpages => {
223                 type => "boolean",
224                 default => 0,
225                 description => "use page/index.mdwn source files",
226                 safe => 1,
227                 rebuild => 1,
228         },
229         discussion => {
230                 type => "boolean",
231                 default => 1,
232                 description => "enable Discussion pages?",
233                 safe => 1,
234                 rebuild => 1,
235         },
236         discussionpage => {
237                 type => "string",
238                 default => gettext("Discussion"),
239                 description => "name of Discussion pages",
240                 safe => 1,
241                 rebuild => 1,
242         },
243         sslcookie => {
244                 type => "boolean",
245                 default => 0,
246                 description => "only send cookies over SSL connections?",
247                 advanced => 1,
248                 safe => 1,
249                 rebuild => 0,
250         },
251         default_pageext => {
252                 type => "string",
253                 default => "mdwn",
254                 description => "extension to use for new pages",
255                 safe => 0, # not sanitized
256                 rebuild => 0,
257         },
258         htmlext => {
259                 type => "string",
260                 default => "html",
261                 description => "extension to use for html files",
262                 safe => 0, # not sanitized
263                 rebuild => 1,
264         },
265         timeformat => {
266                 type => "string",
267                 default => '%c',
268                 description => "strftime format string to display date",
269                 advanced => 1,
270                 safe => 1,
271                 rebuild => 1,
272         },
273         locale => {
274                 type => "string",
275                 default => undef,
276                 example => "en_US.UTF-8",
277                 description => "UTF-8 locale to use",
278                 advanced => 1,
279                 safe => 0,
280                 rebuild => 1,
281         },
282         userdir => {
283                 type => "string",
284                 default => "",
285                 example => "users",
286                 description => "put user pages below specified page",
287                 safe => 1,
288                 rebuild => 1,
289         },
290         numbacklinks => {
291                 type => "integer",
292                 default => 10,
293                 description => "how many backlinks to show before hiding excess (0 to show all)",
294                 safe => 1,
295                 rebuild => 1,
296         },
297         hardlink => {
298                 type => "boolean",
299                 default => 0,
300                 description => "attempt to hardlink source files? (optimisation for large files)",
301                 advanced => 1,
302                 safe => 0, # paranoia
303                 rebuild => 0,
304         },
305         umask => {
306                 type => "integer",
307                 example => "022",
308                 description => "force ikiwiki to use a particular umask",
309                 advanced => 1,
310                 safe => 0, # paranoia
311                 rebuild => 0,
312         },
313         wrappergroup => {
314                 type => "string",
315                 example => "ikiwiki",
316                 description => "group for wrappers to run in",
317                 advanced => 1,
318                 safe => 0, # paranoia
319                 rebuild => 0,
320         },
321         libdir => {
322                 type => "string",
323                 default => "",
324                 example => "$ENV{HOME}/.ikiwiki/",
325                 description => "extra library and plugin directory",
326                 advanced => 1,
327                 safe => 0, # directory
328                 rebuild => 0,
329         },
330         ENV => {
331                 type => "string", 
332                 default => {},
333                 description => "environment variables",
334                 safe => 0, # paranoia
335                 rebuild => 0,
336         },
337         include => {
338                 type => "string",
339                 default => undef,
340                 example => '^\.htaccess$',
341                 description => "regexp of normally excluded files to include",
342                 advanced => 1,
343                 safe => 0, # regexp
344                 rebuild => 1,
345         },
346         exclude => {
347                 type => "string",
348                 default => undef,
349                 example => '^(*\.private|Makefile)$',
350                 description => "regexp of files that should be skipped",
351                 advanced => 1,
352                 safe => 0, # regexp
353                 rebuild => 1,
354         },
355         wiki_file_prune_regexps => {
356                 type => "internal",
357                 default => [qr/(^|\/)\.\.(\/|$)/, qr/^\./, qr/\/\./,
358                         qr/\.x?html?$/, qr/\.ikiwiki-new$/,
359                         qr/(^|\/).svn\//, qr/.arch-ids\//, qr/{arch}\//,
360                         qr/(^|\/)_MTN\//, qr/(^|\/)_darcs\//,
361                         qr/(^|\/)CVS\//, qr/\.dpkg-tmp$/],
362                 description => "regexps of source files to ignore",
363                 safe => 0,
364                 rebuild => 1,
365         },
366         wiki_file_chars => {
367                 type => "string",
368                 description => "specifies the characters that are allowed in source filenames",
369                 default => "-[:alnum:]+/.:_",
370                 safe => 0,
371                 rebuild => 1,
372         },
373         wiki_file_regexp => {
374                 type => "internal",
375                 description => "regexp of legal source files",
376                 safe => 0,
377                 rebuild => 1,
378         },
379         web_commit_regexp => {
380                 type => "internal",
381                 default => qr/^web commit (by (.*?(?=: |$))|from ([0-9a-fA-F:.]+[0-9a-fA-F])):?(.*)/,
382                 description => "regexp to parse web commits from logs",
383                 safe => 0,
384                 rebuild => 0,
385         },
386         cgi => {
387                 type => "internal",
388                 default => 0,
389                 description => "run as a cgi",
390                 safe => 0,
391                 rebuild => 0,
392         },
393         cgi_disable_uploads => {
394                 type => "internal",
395                 default => 1,
396                 description => "whether CGI should accept file uploads",
397                 safe => 0,
398                 rebuild => 0,
399         },
400         post_commit => {
401                 type => "internal",
402                 default => 0,
403                 description => "run as a post-commit hook",
404                 safe => 0,
405                 rebuild => 0,
406         },
407         rebuild => {
408                 type => "internal",
409                 default => 0,
410                 description => "running in rebuild mode",
411                 safe => 0,
412                 rebuild => 0,
413         },
414         setup => {
415                 type => "internal",
416                 default => undef,
417                 description => "running in setup mode",
418                 safe => 0,
419                 rebuild => 0,
420         },
421         clean => {
422                 type => "internal",
423                 default => 0,
424                 description => "running in clean mode",
425                 safe => 0,
426                 rebuild => 0,
427         },
428         refresh => {
429                 type => "internal",
430                 default => 0,
431                 description => "running in refresh mode",
432                 safe => 0,
433                 rebuild => 0,
434         },
435         test_receive => {
436                 type => "internal",
437                 default => 0,
438                 description => "running in receive test mode",
439                 safe => 0,
440                 rebuild => 0,
441         },
442         getctime => {
443                 type => "internal",
444                 default => 0,
445                 description => "running in getctime mode",
446                 safe => 0,
447                 rebuild => 0,
448         },
449         w3mmode => {
450                 type => "internal",
451                 default => 0,
452                 description => "running in w3mmode",
453                 safe => 0,
454                 rebuild => 0,
455         },
456         wikistatedir => {
457                 type => "internal",
458                 default => undef,
459                 description => "path to the .ikiwiki directory holding ikiwiki state",
460                 safe => 0,
461                 rebuild => 0,
462         },
463         setupfile => {
464                 type => "internal",
465                 default => undef,
466                 description => "path to setup file",
467                 safe => 0,
468                 rebuild => 0,
469         },
470         setuptype => {
471                 type => "internal",
472                 default => "Standard",
473                 description => "perl class to use to dump setup file",
474                 safe => 0,
475                 rebuild => 0,
476         },
477         allow_symlinks_before_srcdir => {
478                 type => "boolean",
479                 default => 0,
480                 description => "allow symlinks in the path leading to the srcdir (potentially insecure)",
481                 safe => 0,
482                 rebuild => 0,
483         },
484 }
485
486 sub defaultconfig () {
487         my %s=getsetup();
488         my @ret;
489         foreach my $key (keys %s) {
490                 push @ret, $key, $s{$key}->{default};
491         }
492         use Data::Dumper;
493         return @ret;
494 }
495
496 sub checkconfig () {
497         # locale stuff; avoid LC_ALL since it overrides everything
498         if (defined $ENV{LC_ALL}) {
499                 $ENV{LANG} = $ENV{LC_ALL};
500                 delete $ENV{LC_ALL};
501         }
502         if (defined $config{locale}) {
503                 if (POSIX::setlocale(&POSIX::LC_ALL, $config{locale})) {
504                         $ENV{LANG}=$config{locale};
505                         define_gettext();
506                 }
507         }
508                 
509         if (! defined $config{wiki_file_regexp}) {
510                 $config{wiki_file_regexp}=qr/(^[$config{wiki_file_chars}]+$)/;
511         }
512
513         if (ref $config{ENV} eq 'HASH') {
514                 foreach my $val (keys %{$config{ENV}}) {
515                         $ENV{$val}=$config{ENV}{$val};
516                 }
517         }
518
519         if ($config{w3mmode}) {
520                 eval q{use Cwd q{abs_path}};
521                 error($@) if $@;
522                 $config{srcdir}=possibly_foolish_untaint(abs_path($config{srcdir}));
523                 $config{destdir}=possibly_foolish_untaint(abs_path($config{destdir}));
524                 $config{cgiurl}="file:///\$LIB/ikiwiki-w3m.cgi/".$config{cgiurl}
525                         unless $config{cgiurl} =~ m!file:///!;
526                 $config{url}="file://".$config{destdir};
527         }
528
529         if ($config{cgi} && ! length $config{url}) {
530                 error(gettext("Must specify url to wiki with --url when using --cgi"));
531         }
532         
533         $config{wikistatedir}="$config{srcdir}/.ikiwiki"
534                 unless exists $config{wikistatedir} && defined $config{wikistatedir};
535
536         if (defined $config{umask}) {
537                 umask(possibly_foolish_untaint($config{umask}));
538         }
539
540         run_hooks(checkconfig => sub { shift->() });
541
542         return 1;
543 }
544
545 sub listplugins () {
546         my %ret;
547
548         foreach my $dir (@INC, $config{libdir}) {
549                 next unless defined $dir && length $dir;
550                 foreach my $file (glob("$dir/IkiWiki/Plugin/*.pm")) {
551                         my ($plugin)=$file=~/.*\/(.*)\.pm$/;
552                         $ret{$plugin}=1;
553                 }
554         }
555         foreach my $dir ($config{libdir}, "$installdir/lib/ikiwiki") {
556                 next unless defined $dir && length $dir;
557                 foreach my $file (glob("$dir/plugins/*")) {
558                         $ret{basename($file)}=1 if -x $file;
559                 }
560         }
561
562         return keys %ret;
563 }
564
565 sub loadplugins () {
566         if (defined $config{libdir} && length $config{libdir}) {
567                 unshift @INC, possibly_foolish_untaint($config{libdir});
568         }
569
570         foreach my $plugin (@{$config{default_plugins}}, @{$config{add_plugins}}) {
571                 loadplugin($plugin);
572         }
573         
574         if ($config{rcs}) {
575                 if (exists $hooks{rcs}) {
576                         error(gettext("cannot use multiple rcs plugins"));
577                 }
578                 loadplugin($config{rcs});
579         }
580         if (! exists $hooks{rcs}) {
581                 loadplugin("norcs");
582         }
583
584         run_hooks(getopt => sub { shift->() });
585         if (grep /^-/, @ARGV) {
586                 print STDERR "Unknown option (or missing parameter): $_\n"
587                         foreach grep /^-/, @ARGV;
588                 usage();
589         }
590
591         return 1;
592 }
593
594 sub loadplugin ($) {
595         my $plugin=shift;
596
597         return if grep { $_ eq $plugin} @{$config{disable_plugins}};
598
599         foreach my $dir (defined $config{libdir} ? possibly_foolish_untaint($config{libdir}) : undef,
600                          "$installdir/lib/ikiwiki") {
601                 if (defined $dir && -x "$dir/plugins/$plugin") {
602                         eval { require IkiWiki::Plugin::external };
603                         if ($@) {
604                                 my $reason=$@;
605                                 error(sprintf(gettext("failed to load external plugin needed for %s plugin: %s"), $plugin, $reason));
606                         }
607                         import IkiWiki::Plugin::external "$dir/plugins/$plugin";
608                         $loaded_plugins{$plugin}=1;
609                         return 1;
610                 }
611         }
612
613         my $mod="IkiWiki::Plugin::".possibly_foolish_untaint($plugin);
614         eval qq{use $mod};
615         if ($@) {
616                 error("Failed to load plugin $mod: $@");
617         }
618         $loaded_plugins{$plugin}=1;
619         return 1;
620 }
621
622 sub error ($;$) {
623         my $message=shift;
624         my $cleaner=shift;
625         log_message('err' => $message) if $config{syslog};
626         if (defined $cleaner) {
627                 $cleaner->();
628         }
629         die $message."\n";
630 }
631
632 sub debug ($) {
633         return unless $config{verbose};
634         return log_message(debug => @_);
635 }
636
637 my $log_open=0;
638 sub log_message ($$) {
639         my $type=shift;
640
641         if ($config{syslog}) {
642                 require Sys::Syslog;
643                 if (! $log_open) {
644                         Sys::Syslog::setlogsock('unix');
645                         Sys::Syslog::openlog('ikiwiki', '', 'user');
646                         $log_open=1;
647                 }
648                 return eval {
649                         Sys::Syslog::syslog($type, "[$config{wikiname}] %s", join(" ", @_));
650                 };
651         }
652         elsif (! $config{cgi}) {
653                 return print "@_\n";
654         }
655         else {
656                 return print STDERR "@_\n";
657         }
658 }
659
660 sub possibly_foolish_untaint ($) {
661         my $tainted=shift;
662         my ($untainted)=$tainted=~/(.*)/s;
663         return $untainted;
664 }
665
666 sub basename ($) {
667         my $file=shift;
668
669         $file=~s!.*/+!!;
670         return $file;
671 }
672
673 sub dirname ($) {
674         my $file=shift;
675
676         $file=~s!/*[^/]+$!!;
677         return $file;
678 }
679
680 sub isinternal ($) {
681         my $page=shift;
682         return exists $pagesources{$page} &&
683                 $pagesources{$page} =~ /\._([^.]+)$/;
684 }
685
686 sub pagetype ($) {
687         my $file=shift;
688         
689         if ($file =~ /\.([^.]+)$/) {
690                 return $1 if exists $hooks{htmlize}{$1};
691         }
692         my $base=basename($file);
693         if (exists $hooks{htmlize}{$base} &&
694             $hooks{htmlize}{$base}{noextension}) {
695                 return $base;
696         }
697         return;
698 }
699
700 my %pagename_cache;
701
702 sub pagename ($) {
703         my $file=shift;
704
705         if (exists $pagename_cache{$file}) {
706                 return $pagename_cache{$file};
707         }
708
709         my $type=pagetype($file);
710         my $page=$file;
711         $page=~s/\Q.$type\E*$//
712                 if defined $type && !$hooks{htmlize}{$type}{keepextension}
713                         && !$hooks{htmlize}{$type}{noextension};
714         if ($config{indexpages} && $page=~/(.*)\/index$/) {
715                 $page=$1;
716         }
717
718         $pagename_cache{$file} = $page;
719         return $page;
720 }
721
722 sub newpagefile ($$) {
723         my $page=shift;
724         my $type=shift;
725
726         if (! $config{indexpages} || $page eq 'index') {
727                 return $page.".".$type;
728         }
729         else {
730                 return $page."/index.".$type;
731         }
732 }
733
734 sub targetpage ($$;$) {
735         my $page=shift;
736         my $ext=shift;
737         my $filename=shift;
738         
739         if (defined $filename) {
740                 return $page."/".$filename.".".$ext;
741         }
742         elsif (! $config{usedirs} || $page eq 'index') {
743                 return $page.".".$ext;
744         }
745         else {
746                 return $page."/index.".$ext;
747         }
748 }
749
750 sub htmlpage ($) {
751         my $page=shift;
752         
753         return targetpage($page, $config{htmlext});
754 }
755
756 sub srcfile_stat {
757         my $file=shift;
758         my $nothrow=shift;
759
760         return "$config{srcdir}/$file", stat(_) if -e "$config{srcdir}/$file";
761         foreach my $dir (@{$config{underlaydirs}}, $config{underlaydir}) {
762                 return "$dir/$file", stat(_) if -e "$dir/$file";
763         }
764         error("internal error: $file cannot be found in $config{srcdir} or underlay") unless $nothrow;
765         return;
766 }
767
768 sub srcfile ($;$) {
769         return (srcfile_stat(@_))[0];
770 }
771
772 sub add_underlay ($) {
773         my $dir=shift;
774
775         if ($dir !~ /^\//) {
776                 $dir="$config{underlaydirbase}/$dir";
777         }
778
779         if (! grep { $_ eq $dir } @{$config{underlaydirs}}) {
780                 unshift @{$config{underlaydirs}}, $dir;
781         }
782
783         return 1;
784 }
785
786 sub readfile ($;$$) {
787         my $file=shift;
788         my $binary=shift;
789         my $wantfd=shift;
790
791         if (-l $file) {
792                 error("cannot read a symlink ($file)");
793         }
794         
795         local $/=undef;
796         open (my $in, "<", $file) || error("failed to read $file: $!");
797         binmode($in) if ($binary);
798         return \*$in if $wantfd;
799         my $ret=<$in>;
800         # check for invalid utf-8, and toss it back to avoid crashes
801         if (! utf8::valid($ret)) {
802                 $ret=encode_utf8($ret);
803         }
804         close $in || error("failed to read $file: $!");
805         return $ret;
806 }
807
808 sub prep_writefile ($$) {
809         my $file=shift;
810         my $destdir=shift;
811         
812         my $test=$file;
813         while (length $test) {
814                 if (-l "$destdir/$test") {
815                         error("cannot write to a symlink ($test)");
816                 }
817                 $test=dirname($test);
818         }
819
820         my $dir=dirname("$destdir/$file");
821         if (! -d $dir) {
822                 my $d="";
823                 foreach my $s (split(m!/+!, $dir)) {
824                         $d.="$s/";
825                         if (! -d $d) {
826                                 mkdir($d) || error("failed to create directory $d: $!");
827                         }
828                 }
829         }
830
831         return 1;
832 }
833
834 sub writefile ($$$;$$) {
835         my $file=shift; # can include subdirs
836         my $destdir=shift; # directory to put file in
837         my $content=shift;
838         my $binary=shift;
839         my $writer=shift;
840         
841         prep_writefile($file, $destdir);
842         
843         my $newfile="$destdir/$file.ikiwiki-new";
844         if (-l $newfile) {
845                 error("cannot write to a symlink ($newfile)");
846         }
847         
848         my $cleanup = sub { unlink($newfile) };
849         open (my $out, '>', $newfile) || error("failed to write $newfile: $!", $cleanup);
850         binmode($out) if ($binary);
851         if ($writer) {
852                 $writer->(\*$out, $cleanup);
853         }
854         else {
855                 print $out $content or error("failed writing to $newfile: $!", $cleanup);
856         }
857         close $out || error("failed saving $newfile: $!", $cleanup);
858         rename($newfile, "$destdir/$file") || 
859                 error("failed renaming $newfile to $destdir/$file: $!", $cleanup);
860
861         return 1;
862 }
863
864 my %cleared;
865 sub will_render ($$;$) {
866         my $page=shift;
867         my $dest=shift;
868         my $clear=shift;
869
870         # Important security check.
871         if (-e "$config{destdir}/$dest" && ! $config{rebuild} &&
872             ! grep { $_ eq $dest } (@{$renderedfiles{$page}}, @{$oldrenderedfiles{$page}}, @{$wikistate{editpage}{previews}})) {
873                 error("$config{destdir}/$dest independently created, not overwriting with version from $page");
874         }
875
876         if (! $clear || $cleared{$page}) {
877                 $renderedfiles{$page}=[$dest, grep { $_ ne $dest } @{$renderedfiles{$page}}];
878         }
879         else {
880                 foreach my $old (@{$renderedfiles{$page}}) {
881                         delete $destsources{$old};
882                 }
883                 $renderedfiles{$page}=[$dest];
884                 $cleared{$page}=1;
885         }
886         $destsources{$dest}=$page;
887
888         return 1;
889 }
890
891 sub bestlink ($$) {
892         my $page=shift;
893         my $link=shift;
894         
895         my $cwd=$page;
896         if ($link=~s/^\/+//) {
897                 # absolute links
898                 $cwd="";
899         }
900         $link=~s/\/$//;
901
902         do {
903                 my $l=$cwd;
904                 $l.="/" if length $l;
905                 $l.=$link;
906
907                 if (exists $pagesources{$l}) {
908                         return $l;
909                 }
910                 elsif (exists $pagecase{lc $l}) {
911                         return $pagecase{lc $l};
912                 }
913         } while $cwd=~s{/?[^/]+$}{};
914
915         if (length $config{userdir}) {
916                 my $l = "$config{userdir}/".lc($link);
917                 if (exists $pagesources{$l}) {
918                         return $l;
919                 }
920                 elsif (exists $pagecase{lc $l}) {
921                         return $pagecase{lc $l};
922                 }
923         }
924
925         #print STDERR "warning: page $page, broken link: $link\n";
926         return "";
927 }
928
929 sub isinlinableimage ($) {
930         my $file=shift;
931         
932         return $file =~ /\.(png|gif|jpg|jpeg)$/i;
933 }
934
935 sub pagetitle ($;$) {
936         my $page=shift;
937         my $unescaped=shift;
938
939         if ($unescaped) {
940                 $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : chr($2)/eg;
941         }
942         else {
943                 $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : "&#$2;"/eg;
944         }
945
946         return $page;
947 }
948
949 sub titlepage ($) {
950         my $title=shift;
951         # support use w/o %config set
952         my $chars = defined $config{wiki_file_chars} ? $config{wiki_file_chars} : "-[:alnum:]+/.:_";
953         $title=~s/([^$chars]|_)/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
954         return $title;
955 }
956
957 sub linkpage ($) {
958         my $link=shift;
959         my $chars = defined $config{wiki_file_chars} ? $config{wiki_file_chars} : "-[:alnum:]+/.:_";
960         $link=~s/([^$chars])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
961         return $link;
962 }
963
964 sub cgiurl (@) {
965         my %params=@_;
966
967         my $cgiurl=$config{cgiurl};
968         if (exists $params{cgiurl}) {
969                 $cgiurl=$params{cgiurl};
970                 delete $params{cgiurl};
971         }
972         return $cgiurl."?".
973                 join("&amp;", map $_."=".uri_escape_utf8($params{$_}), keys %params);
974 }
975
976 sub baseurl (;$) {
977         my $page=shift;
978
979         return "$config{url}/" if ! defined $page;
980         
981         $page=htmlpage($page);
982         $page=~s/[^\/]+$//;
983         $page=~s/[^\/]+\//..\//g;
984         return $page;
985 }
986
987 sub abs2rel ($$) {
988         # Work around very innefficient behavior in File::Spec if abs2rel
989         # is passed two relative paths. It's much faster if paths are
990         # absolute! (Debian bug #376658; fixed in debian unstable now)
991         my $path="/".shift;
992         my $base="/".shift;
993
994         require File::Spec;
995         my $ret=File::Spec->abs2rel($path, $base);
996         $ret=~s/^// if defined $ret;
997         return $ret;
998 }
999
1000 sub displaytime ($;$) {
1001         # Plugins can override this function to mark up the time to
1002         # display.
1003         return '<span class="date">'.formattime(@_).'</span>';
1004 }
1005
1006 sub formattime ($;$) {
1007         # Plugins can override this function to format the time.
1008         my $time=shift;
1009         my $format=shift;
1010         if (! defined $format) {
1011                 $format=$config{timeformat};
1012         }
1013
1014         # strftime doesn't know about encodings, so make sure
1015         # its output is properly treated as utf8
1016         return decode_utf8(POSIX::strftime($format, localtime($time)));
1017 }
1018
1019 sub beautify_urlpath ($) {
1020         my $url=shift;
1021
1022         # Ensure url is not an empty link, and if necessary,
1023         # add ./ to avoid colon confusion.
1024         if ($url !~ /^\// && $url !~ /^\.\.?\//) {
1025                 $url="./$url";
1026         }
1027
1028         if ($config{usedirs}) {
1029                 $url =~ s!/index.$config{htmlext}$!/!;
1030         }
1031
1032         return $url;
1033 }
1034
1035 sub urlto ($$;$) {
1036         my $to=shift;
1037         my $from=shift;
1038         my $absolute=shift;
1039         
1040         if (! length $to) {
1041                 return beautify_urlpath(baseurl($from)."index.$config{htmlext}");
1042         }
1043
1044         if (! $destsources{$to}) {
1045                 $to=htmlpage($to);
1046         }
1047
1048         if ($absolute) {
1049                 return $config{url}.beautify_urlpath("/".$to);
1050         }
1051
1052         my $link = abs2rel($to, dirname(htmlpage($from)));
1053
1054         return beautify_urlpath($link);
1055 }
1056
1057 sub htmllink ($$$;@) {
1058         my $lpage=shift; # the page doing the linking
1059         my $page=shift; # the page that will contain the link (different for inline)
1060         my $link=shift;
1061         my %opts=@_;
1062
1063         $link=~s/\/$//;
1064
1065         my $bestlink;
1066         if (! $opts{forcesubpage}) {
1067                 $bestlink=bestlink($lpage, $link);
1068         }
1069         else {
1070                 $bestlink="$lpage/".lc($link);
1071         }
1072
1073         my $linktext;
1074         if (defined $opts{linktext}) {
1075                 $linktext=$opts{linktext};
1076         }
1077         else {
1078                 $linktext=pagetitle(basename($link));
1079         }
1080         
1081         return "<span class=\"selflink\">$linktext</span>"
1082                 if length $bestlink && $page eq $bestlink &&
1083                    ! defined $opts{anchor};
1084         
1085         if (! $destsources{$bestlink}) {
1086                 $bestlink=htmlpage($bestlink);
1087
1088                 if (! $destsources{$bestlink}) {
1089                         return $linktext unless length $config{cgiurl};
1090                         return "<span class=\"createlink\"><a href=\"".
1091                                 cgiurl(
1092                                         do => "create",
1093                                         page => lc($link),
1094                                         from => $lpage
1095                                 ).
1096                                 "\" rel=\"nofollow\">?</a>$linktext</span>"
1097                 }
1098         }
1099         
1100         $bestlink=abs2rel($bestlink, dirname(htmlpage($page)));
1101         $bestlink=beautify_urlpath($bestlink);
1102         
1103         if (! $opts{noimageinline} && isinlinableimage($bestlink)) {
1104                 return "<img src=\"$bestlink\" alt=\"$linktext\" />";
1105         }
1106
1107         if (defined $opts{anchor}) {
1108                 $bestlink.="#".$opts{anchor};
1109         }
1110
1111         my @attrs;
1112         foreach my $attr (qw{rel class title}) {
1113                 if (defined $opts{$attr}) {
1114                         push @attrs, " $attr=\"$opts{$attr}\"";
1115                 }
1116         }
1117
1118         return "<a href=\"$bestlink\"@attrs>$linktext</a>";
1119 }
1120
1121 sub userpage ($) {
1122         my $user=shift;
1123         return length $config{userdir} ? "$config{userdir}/$user" : $user;
1124 }
1125
1126 sub openiduser ($) {
1127         my $user=shift;
1128
1129         if ($user =~ m!^https?://! &&
1130             eval q{use Net::OpenID::VerifiedIdentity; 1} && !$@) {
1131                 my $display;
1132
1133                 if (Net::OpenID::VerifiedIdentity->can("DisplayOfURL")) {
1134                         $display = Net::OpenID::VerifiedIdentity::DisplayOfURL($user);
1135                 }
1136                 else {
1137                         # backcompat with old version
1138                         my $oid=Net::OpenID::VerifiedIdentity->new(identity => $user);
1139                         $display=$oid->display;
1140                 }
1141
1142                 # Convert "user.somehost.com" to "user [somehost.com]"
1143                 # (also "user.somehost.co.uk")
1144                 if ($display !~ /\[/) {
1145                         $display=~s/^([-a-zA-Z0-9]+?)\.([-.a-zA-Z0-9]+\.[a-z]+)$/$1 [$2]/;
1146                 }
1147                 # Convert "http://somehost.com/user" to "user [somehost.com]".
1148                 # (also "https://somehost.com/user/")
1149                 if ($display !~ /\[/) {
1150                         $display=~s/^https?:\/\/(.+)\/([^\/#?]+)\/?(?:[#?].*)?$/$2 [$1]/;
1151                 }
1152                 $display=~s!^https?://!!; # make sure this is removed
1153                 eval q{use CGI 'escapeHTML'};
1154                 error($@) if $@;
1155                 return escapeHTML($display);
1156         }
1157         return;
1158 }
1159
1160 sub htmlize ($$$$) {
1161         my $page=shift;
1162         my $destpage=shift;
1163         my $type=shift;
1164         my $content=shift;
1165         
1166         my $oneline = $content !~ /\n/;
1167         
1168         if (exists $hooks{htmlize}{$type}) {
1169                 $content=$hooks{htmlize}{$type}{call}->(
1170                         page => $page,
1171                         content => $content,
1172                 );
1173         }
1174         else {
1175                 error("htmlization of $type not supported");
1176         }
1177
1178         run_hooks(sanitize => sub {
1179                 $content=shift->(
1180                         page => $page,
1181                         destpage => $destpage,
1182                         content => $content,
1183                 );
1184         });
1185         
1186         if ($oneline) {
1187                 # hack to get rid of enclosing junk added by markdown
1188                 # and other htmlizers/sanitizers
1189                 $content=~s/^<p>//i;
1190                 $content=~s/<\/p>\n*$//i;
1191         }
1192
1193         return $content;
1194 }
1195
1196 sub linkify ($$$) {
1197         my $page=shift;
1198         my $destpage=shift;
1199         my $content=shift;
1200
1201         run_hooks(linkify => sub {
1202                 $content=shift->(
1203                         page => $page,
1204                         destpage => $destpage,
1205                         content => $content,
1206                 );
1207         });
1208         
1209         return $content;
1210 }
1211
1212 our %preprocessing;
1213 our $preprocess_preview=0;
1214 sub preprocess ($$$;$$) {
1215         my $page=shift; # the page the data comes from
1216         my $destpage=shift; # the page the data will appear in (different for inline)
1217         my $content=shift;
1218         my $scan=shift;
1219         my $preview=shift;
1220
1221         # Using local because it needs to be set within any nested calls
1222         # of this function.
1223         local $preprocess_preview=$preview if defined $preview;
1224
1225         my $handle=sub {
1226                 my $escape=shift;
1227                 my $prefix=shift;
1228                 my $command=shift;
1229                 my $params=shift;
1230                 $params="" if ! defined $params;
1231
1232                 if (length $escape) {
1233                         return "[[$prefix$command $params]]";
1234                 }
1235                 elsif (exists $hooks{preprocess}{$command}) {
1236                         return "" if $scan && ! $hooks{preprocess}{$command}{scan};
1237                         # Note: preserve order of params, some plugins may
1238                         # consider it significant.
1239                         my @params;
1240                         while ($params =~ m{
1241                                 (?:([-\w]+)=)?          # 1: named parameter key?
1242                                 (?:
1243                                         """(.*?)"""     # 2: triple-quoted value
1244                                 |
1245                                         "([^"]*?)"      # 3: single-quoted value
1246                                 |
1247                                         (\S+)           # 4: unquoted value
1248                                 )
1249                                 (?:\s+|$)               # delimiter to next param
1250                         }sgx) {
1251                                 my $key=$1;
1252                                 my $val;
1253                                 if (defined $2) {
1254                                         $val=$2;
1255                                         $val=~s/\r\n/\n/mg;
1256                                         $val=~s/^\n+//g;
1257                                         $val=~s/\n+$//g;
1258                                 }
1259                                 elsif (defined $3) {
1260                                         $val=$3;
1261                                 }
1262                                 elsif (defined $4) {
1263                                         $val=$4;
1264                                 }
1265
1266                                 if (defined $key) {
1267                                         push @params, $key, $val;
1268                                 }
1269                                 else {
1270                                         push @params, $val, '';
1271                                 }
1272                         }
1273                         if ($preprocessing{$page}++ > 3) {
1274                                 # Avoid loops of preprocessed pages preprocessing
1275                                 # other pages that preprocess them, etc.
1276                                 return "[[!$command <span class=\"error\">".
1277                                         sprintf(gettext("preprocessing loop detected on %s at depth %i"),
1278                                                 $page, $preprocessing{$page}).
1279                                         "</span>]]";
1280                         }
1281                         my $ret;
1282                         if (! $scan) {
1283                                 $ret=eval {
1284                                         $hooks{preprocess}{$command}{call}->(
1285                                                 @params,
1286                                                 page => $page,
1287                                                 destpage => $destpage,
1288                                                 preview => $preprocess_preview,
1289                                         );
1290                                 };
1291                                 if ($@) {
1292                                         my $error=$@;
1293                                         chomp $error;
1294                                         $ret="[[!$command <span class=\"error\">".
1295                                                 gettext("Error").": $error"."</span>]]";
1296                                 }
1297                         }
1298                         else {
1299                                 # use void context during scan pass
1300                                 eval {
1301                                         $hooks{preprocess}{$command}{call}->(
1302                                                 @params,
1303                                                 page => $page,
1304                                                 destpage => $destpage,
1305                                                 preview => $preprocess_preview,
1306                                         );
1307                                 };
1308                                 $ret="";
1309                         }
1310                         $preprocessing{$page}--;
1311                         return $ret;
1312                 }
1313                 else {
1314                         return "[[$prefix$command $params]]";
1315                 }
1316         };
1317         
1318         my $regex;
1319         if ($config{prefix_directives}) {
1320                 $regex = qr{
1321                         (\\?)           # 1: escape?
1322                         \[\[(!)         # directive open; 2: prefix
1323                         ([-\w]+)        # 3: command
1324                         (               # 4: the parameters..
1325                                 \s+     # Must have space if parameters present
1326                                 (?:
1327                                         (?:[-\w]+=)?            # named parameter key?
1328                                         (?:
1329                                                 """.*?"""       # triple-quoted value
1330                                                 |
1331                                                 "[^"]*?"        # single-quoted value
1332                                                 |
1333                                                 [^"\s\]]+       # unquoted value
1334                                         )
1335                                         \s*                     # whitespace or end
1336                                                                 # of directive
1337                                 )
1338                         *)?             # 0 or more parameters
1339                         \]\]            # directive closed
1340                 }sx;
1341         }
1342         else {
1343                 $regex = qr{
1344                         (\\?)           # 1: escape?
1345                         \[\[(!?)        # directive open; 2: optional prefix
1346                         ([-\w]+)        # 3: command
1347                         \s+
1348                         (               # 4: the parameters..
1349                                 (?:
1350                                         (?:[-\w]+=)?            # named parameter key?
1351                                         (?:
1352                                                 """.*?"""       # triple-quoted value
1353                                                 |
1354                                                 "[^"]*?"        # single-quoted value
1355                                                 |
1356                                                 [^"\s\]]+       # unquoted value
1357                                         )
1358                                         \s*                     # whitespace or end
1359                                                                 # of directive
1360                                 )
1361                         *)              # 0 or more parameters
1362                         \]\]            # directive closed
1363                 }sx;
1364         }
1365
1366         $content =~ s{$regex}{$handle->($1, $2, $3, $4)}eg;
1367         return $content;
1368 }
1369
1370 sub filter ($$$) {
1371         my $page=shift;
1372         my $destpage=shift;
1373         my $content=shift;
1374
1375         run_hooks(filter => sub {
1376                 $content=shift->(page => $page, destpage => $destpage, 
1377                         content => $content);
1378         });
1379
1380         return $content;
1381 }
1382
1383 sub indexlink () {
1384         return "<a href=\"$config{url}\">$config{wikiname}</a>";
1385 }
1386
1387 sub check_canedit ($$$;$) {
1388         my $page=shift;
1389         my $q=shift;
1390         my $session=shift;
1391         my $nonfatal=shift;
1392         
1393         my $canedit;
1394         run_hooks(canedit => sub {
1395                 return if defined $canedit;
1396                 my $ret=shift->($page, $q, $session);
1397                 if (defined $ret) {
1398                         if ($ret eq "") {
1399                                 $canedit=1;
1400                         }
1401                         elsif (ref $ret eq 'CODE') {
1402                                 $ret->() unless $nonfatal;
1403                                 $canedit=0;
1404                         }
1405                         elsif (defined $ret) {
1406                                 error($ret) unless $nonfatal;
1407                                 $canedit=0;
1408                         }
1409                 }
1410         });
1411         return defined $canedit ? $canedit : 1;
1412 }
1413
1414 sub check_content (@) {
1415         my %params=@_;
1416         
1417         return 1 if ! exists $hooks{checkcontent}; # optimisation
1418
1419         if (exists $pagesources{$params{page}}) {
1420                 my @diff;
1421                 my %old=map { $_ => 1 }
1422                         split("\n", readfile(srcfile($pagesources{$params{page}})));
1423                 foreach my $line (split("\n", $params{content})) {
1424                         push @diff, $line if ! exists $old{$line};
1425                 }
1426                 $params{diff}=join("\n", @diff);
1427         }
1428
1429         my $ok;
1430         run_hooks(checkcontent => sub {
1431                 return if defined $ok;
1432                 my $ret=shift->(%params);
1433                 if (defined $ret) {
1434                         if ($ret eq "") {
1435                                 $ok=1;
1436                         }
1437                         elsif (ref $ret eq 'CODE') {
1438                                 $ret->() unless $params{nonfatal};
1439                                 $ok=0;
1440                         }
1441                         elsif (defined $ret) {
1442                                 error($ret) unless $params{nonfatal};
1443                                 $ok=0;
1444                         }
1445                 }
1446
1447         });
1448         return defined $ok ? $ok : 1;
1449 }
1450
1451 my $wikilock;
1452
1453 sub lockwiki () {
1454         # Take an exclusive lock on the wiki to prevent multiple concurrent
1455         # run issues. The lock will be dropped on program exit.
1456         if (! -d $config{wikistatedir}) {
1457                 mkdir($config{wikistatedir});
1458         }
1459         open($wikilock, '>', "$config{wikistatedir}/lockfile") ||
1460                 error ("cannot write to $config{wikistatedir}/lockfile: $!");
1461         if (! flock($wikilock, 2)) { # LOCK_EX
1462                 error("failed to get lock");
1463         }
1464         return 1;
1465 }
1466
1467 sub unlockwiki () {
1468         POSIX::close($ENV{IKIWIKI_CGILOCK_FD}) if exists $ENV{IKIWIKI_CGILOCK_FD};
1469         return close($wikilock) if $wikilock;
1470         return;
1471 }
1472
1473 my $commitlock;
1474
1475 sub commit_hook_enabled () {
1476         open($commitlock, '+>', "$config{wikistatedir}/commitlock") ||
1477                 error("cannot write to $config{wikistatedir}/commitlock: $!");
1478         if (! flock($commitlock, 1 | 4)) { # LOCK_SH | LOCK_NB to test
1479                 close($commitlock) || error("failed closing commitlock: $!");
1480                 return 0;
1481         }
1482         close($commitlock) || error("failed closing commitlock: $!");
1483         return 1;
1484 }
1485
1486 sub disable_commit_hook () {
1487         open($commitlock, '>', "$config{wikistatedir}/commitlock") ||
1488                 error("cannot write to $config{wikistatedir}/commitlock: $!");
1489         if (! flock($commitlock, 2)) { # LOCK_EX
1490                 error("failed to get commit lock");
1491         }
1492         return 1;
1493 }
1494
1495 sub enable_commit_hook () {
1496         return close($commitlock) if $commitlock;
1497         return;
1498 }
1499
1500 sub loadindex () {
1501         %oldrenderedfiles=%pagectime=();
1502         if (! $config{rebuild}) {
1503                 %pagesources=%pagemtime=%oldlinks=%links=%depends=
1504                 %destsources=%renderedfiles=%pagecase=%pagestate=
1505                 %depends_simple=%typedlinks=%oldtypedlinks=();
1506         }
1507         my $in;
1508         if (! open ($in, "<", "$config{wikistatedir}/indexdb")) {
1509                 if (-e "$config{wikistatedir}/index") {
1510                         system("ikiwiki-transition", "indexdb", $config{srcdir});
1511                         open ($in, "<", "$config{wikistatedir}/indexdb") || return;
1512                 }
1513                 else {
1514                         return;
1515                 }
1516         }
1517
1518         my $index=Storable::fd_retrieve($in);
1519         if (! defined $index) {
1520                 return 0;
1521         }
1522
1523         my $pages;
1524         if (exists $index->{version} && ! ref $index->{version}) {
1525                 $pages=$index->{page};
1526                 %wikistate=%{$index->{state}};
1527         }
1528         else {
1529                 $pages=$index;
1530                 %wikistate=();
1531         }
1532
1533         foreach my $src (keys %$pages) {
1534                 my $d=$pages->{$src};
1535                 my $page=pagename($src);
1536                 $pagectime{$page}=$d->{ctime};
1537                 if (! $config{rebuild}) {
1538                         $pagesources{$page}=$src;
1539                         $pagemtime{$page}=$d->{mtime};
1540                         $renderedfiles{$page}=$d->{dest};
1541                         if (exists $d->{links} && ref $d->{links}) {
1542                                 $links{$page}=$d->{links};
1543                                 $oldlinks{$page}=[@{$d->{links}}];
1544                         }
1545                         if (ref $d->{depends_simple} eq 'ARRAY') {
1546                                 # old format
1547                                 $depends_simple{$page}={
1548                                         map { $_ => 1 } @{$d->{depends_simple}}
1549                                 };
1550                         }
1551                         elsif (exists $d->{depends_simple}) {
1552                                 $depends_simple{$page}=$d->{depends_simple};
1553                         }
1554                         if (exists $d->{dependslist}) {
1555                                 # old format
1556                                 $depends{$page}={
1557                                         map { $_ => $DEPEND_CONTENT }
1558                                                 @{$d->{dependslist}}
1559                                 };
1560                         }
1561                         elsif (exists $d->{depends} && ! ref $d->{depends}) {
1562                                 # old format
1563                                 $depends{$page}={$d->{depends} => $DEPEND_CONTENT };
1564                         }
1565                         elsif (exists $d->{depends}) {
1566                                 $depends{$page}=$d->{depends};
1567                         }
1568                         if (exists $d->{state}) {
1569                                 $pagestate{$page}=$d->{state};
1570                         }
1571                         if (exists $d->{typedlinks}) {
1572                                 $typedlinks{$page}=$d->{typedlinks};
1573
1574                                 while (my ($type, $links) = each %{$typedlinks{$page}}) {
1575                                         next unless %$links;
1576                                         $oldtypedlinks{$page}{$type} = {%$links};
1577                                 }
1578                         }
1579                 }
1580                 $oldrenderedfiles{$page}=[@{$d->{dest}}];
1581         }
1582         foreach my $page (keys %pagesources) {
1583                 $pagecase{lc $page}=$page;
1584         }
1585         foreach my $page (keys %renderedfiles) {
1586                 $destsources{$_}=$page foreach @{$renderedfiles{$page}};
1587         }
1588         return close($in);
1589 }
1590
1591 sub saveindex () {
1592         run_hooks(savestate => sub { shift->() });
1593
1594         my %hookids;
1595         foreach my $type (keys %hooks) {
1596                 $hookids{$_}=1 foreach keys %{$hooks{$type}};
1597         }
1598         my @hookids=keys %hookids;
1599
1600         if (! -d $config{wikistatedir}) {
1601                 mkdir($config{wikistatedir});
1602         }
1603         my $newfile="$config{wikistatedir}/indexdb.new";
1604         my $cleanup = sub { unlink($newfile) };
1605         open (my $out, '>', $newfile) || error("cannot write to $newfile: $!", $cleanup);
1606
1607         my %index;
1608         foreach my $page (keys %pagemtime) {
1609                 next unless $pagemtime{$page};
1610                 my $src=$pagesources{$page};
1611
1612                 $index{page}{$src}={
1613                         ctime => $pagectime{$page},
1614                         mtime => $pagemtime{$page},
1615                         dest => $renderedfiles{$page},
1616                         links => $links{$page},
1617                 };
1618
1619                 if (exists $depends{$page}) {
1620                         $index{page}{$src}{depends} = $depends{$page};
1621                 }
1622
1623                 if (exists $depends_simple{$page}) {
1624                         $index{page}{$src}{depends_simple} = $depends_simple{$page};
1625                 }
1626
1627                 if (exists $typedlinks{$page} && %{$typedlinks{$page}}) {
1628                         $index{page}{$src}{typedlinks} = $typedlinks{$page};
1629                 }
1630
1631                 if (exists $pagestate{$page}) {
1632                         foreach my $id (@hookids) {
1633                                 foreach my $key (keys %{$pagestate{$page}{$id}}) {
1634                                         $index{page}{$src}{state}{$id}{$key}=$pagestate{$page}{$id}{$key};
1635                                 }
1636                         }
1637                 }
1638         }
1639
1640         $index{state}={};
1641         foreach my $id (@hookids) {
1642                 foreach my $key (keys %{$wikistate{$id}}) {
1643                         $index{state}{$id}{$key}=$wikistate{$id}{$key};
1644                 }
1645         }
1646         
1647         $index{version}="3";
1648         my $ret=Storable::nstore_fd(\%index, $out);
1649         return if ! defined $ret || ! $ret;
1650         close $out || error("failed saving to $newfile: $!", $cleanup);
1651         rename($newfile, "$config{wikistatedir}/indexdb") ||
1652                 error("failed renaming $newfile to $config{wikistatedir}/indexdb", $cleanup);
1653         
1654         return 1;
1655 }
1656
1657 sub template_file ($) {
1658         my $template=shift;
1659
1660         foreach my $dir ($config{templatedir}, @{$config{templatedirs}},
1661                          "$installdir/share/ikiwiki/templates") {
1662                 return "$dir/$template" if -e "$dir/$template";
1663         }
1664         return;
1665 }
1666
1667 sub template_params (@) {
1668         my $filename=template_file(shift);
1669
1670         if (! defined $filename) {
1671                 return if wantarray;
1672                 return "";
1673         }
1674
1675         my @ret=(
1676                 filter => sub {
1677                         my $text_ref = shift;
1678                         ${$text_ref} = decode_utf8(${$text_ref});
1679                 },
1680                 filename => $filename,
1681                 loop_context_vars => 1,
1682                 die_on_bad_params => 0,
1683                 @_
1684         );
1685         return wantarray ? @ret : {@ret};
1686 }
1687
1688 sub template ($;@) {
1689         require HTML::Template;
1690         return HTML::Template->new(template_params(@_));
1691 }
1692
1693 sub misctemplate ($$;@) {
1694         my $title=shift;
1695         my $pagebody=shift;
1696         
1697         my $template=template("misc.tmpl");
1698         $template->param(
1699                 title => $title,
1700                 indexlink => indexlink(),
1701                 wikiname => $config{wikiname},
1702                 pagebody => $pagebody,
1703                 baseurl => baseurl(),
1704                 @_,
1705         );
1706         run_hooks(pagetemplate => sub {
1707                 shift->(page => "", destpage => "", template => $template);
1708         });
1709         return $template->output;
1710 }
1711
1712 sub hook (@) {
1713         my %param=@_;
1714         
1715         if (! exists $param{type} || ! ref $param{call} || ! exists $param{id}) {
1716                 error 'hook requires type, call, and id parameters';
1717         }
1718
1719         return if $param{no_override} && exists $hooks{$param{type}}{$param{id}};
1720         
1721         $hooks{$param{type}}{$param{id}}=\%param;
1722         return 1;
1723 }
1724
1725 sub run_hooks ($$) {
1726         # Calls the given sub for each hook of the given type,
1727         # passing it the hook function to call.
1728         my $type=shift;
1729         my $sub=shift;
1730
1731         if (exists $hooks{$type}) {
1732                 my (@first, @middle, @last);
1733                 foreach my $id (keys %{$hooks{$type}}) {
1734                         if ($hooks{$type}{$id}{first}) {
1735                                 push @first, $id;
1736                         }
1737                         elsif ($hooks{$type}{$id}{last}) {
1738                                 push @last, $id;
1739                         }
1740                         else {
1741                                 push @middle, $id;
1742                         }
1743                 }
1744                 foreach my $id (@first, @middle, @last) {
1745                         $sub->($hooks{$type}{$id}{call});
1746                 }
1747         }
1748
1749         return 1;
1750 }
1751
1752 sub rcs_update () {
1753         $hooks{rcs}{rcs_update}{call}->(@_);
1754 }
1755
1756 sub rcs_prepedit ($) {
1757         $hooks{rcs}{rcs_prepedit}{call}->(@_);
1758 }
1759
1760 sub rcs_commit ($$$;$$) {
1761         $hooks{rcs}{rcs_commit}{call}->(@_);
1762 }
1763
1764 sub rcs_commit_staged ($$$) {
1765         $hooks{rcs}{rcs_commit_staged}{call}->(@_);
1766 }
1767
1768 sub rcs_add ($) {
1769         $hooks{rcs}{rcs_add}{call}->(@_);
1770 }
1771
1772 sub rcs_remove ($) {
1773         $hooks{rcs}{rcs_remove}{call}->(@_);
1774 }
1775
1776 sub rcs_rename ($$) {
1777         $hooks{rcs}{rcs_rename}{call}->(@_);
1778 }
1779
1780 sub rcs_recentchanges ($) {
1781         $hooks{rcs}{rcs_recentchanges}{call}->(@_);
1782 }
1783
1784 sub rcs_diff ($) {
1785         $hooks{rcs}{rcs_diff}{call}->(@_);
1786 }
1787
1788 sub rcs_getctime ($) {
1789         $hooks{rcs}{rcs_getctime}{call}->(@_);
1790 }
1791
1792 sub rcs_receive () {
1793         $hooks{rcs}{rcs_receive}{call}->();
1794 }
1795
1796 sub add_depends ($$;$) {
1797         my $page=shift;
1798         my $pagespec=shift;
1799         my $deptype=shift || $DEPEND_CONTENT;
1800
1801         # Is the pagespec a simple page name?
1802         if ($pagespec =~ /$config{wiki_file_regexp}/ &&
1803             $pagespec !~ /[\s*?()!]/) {
1804                 $depends_simple{$page}{lc $pagespec} |= $deptype;
1805                 return 1;
1806         }
1807
1808         # Add explicit dependencies for influences.
1809         my $sub=pagespec_translate($pagespec);
1810         return unless defined $sub;
1811         foreach my $p (keys %pagesources) {
1812                 my $r=$sub->($p, location => $page);
1813                 my $i=$r->influences;
1814                 foreach my $k (keys %$i) {
1815                         $depends_simple{$page}{lc $k} |= $i->{$k};
1816                 }
1817                 last if $r->influences_static;
1818         }
1819
1820         $depends{$page}{$pagespec} |= $deptype;
1821         return 1;
1822 }
1823
1824 sub deptype (@) {
1825         my $deptype=0;
1826         foreach my $type (@_) {
1827                 if ($type eq 'presence') {
1828                         $deptype |= $DEPEND_PRESENCE;
1829                 }
1830                 elsif ($type eq 'links') { 
1831                         $deptype |= $DEPEND_LINKS;
1832                 }
1833                 elsif ($type eq 'content') {
1834                         $deptype |= $DEPEND_CONTENT;
1835                 }
1836         }
1837         return $deptype;
1838 }
1839
1840 my $file_prune_regexp;
1841 sub file_pruned ($;$) {
1842         my $file=shift;
1843         if (@_) {
1844                 require File::Spec;
1845                 $file=File::Spec->canonpath($file);
1846                 my $base=File::Spec->canonpath(shift);
1847                 return if $file eq $base;
1848                 $file =~ s#^\Q$base\E/+##;
1849         }
1850
1851         if (defined $config{include} && length $config{include}) {
1852                 return 0 if $file =~ m/$config{include}/;
1853         }
1854
1855         if (! defined $file_prune_regexp) {
1856                 $file_prune_regexp='('.join('|', @{$config{wiki_file_prune_regexps}}).')';
1857                 $file_prune_regexp=qr/$file_prune_regexp/;
1858         }
1859         return $file =~ m/$file_prune_regexp/;
1860 }
1861
1862 sub define_gettext () {
1863         # If translation is needed, redefine the gettext function to do it.
1864         # Otherwise, it becomes a quick no-op.
1865         my $gettext_obj;
1866         my $getobj;
1867         if ((exists $ENV{LANG} && length $ENV{LANG}) ||
1868             (exists $ENV{LC_ALL} && length $ENV{LC_ALL}) ||
1869             (exists $ENV{LC_MESSAGES} && length $ENV{LC_MESSAGES})) {
1870                 $getobj=sub {
1871                         $gettext_obj=eval q{
1872                                 use Locale::gettext q{textdomain};
1873                                 Locale::gettext->domain('ikiwiki')
1874                         };
1875                 };
1876         }
1877
1878         no warnings 'redefine';
1879         *gettext=sub {
1880                 $getobj->() if $getobj;
1881                 if ($gettext_obj) {
1882                         $gettext_obj->get(shift);
1883                 }
1884                 else {
1885                         return shift;
1886                 }
1887         };
1888         *ngettext=sub {
1889                 $getobj->() if $getobj;
1890                 if ($gettext_obj) {
1891                         $gettext_obj->nget(@_);
1892                 }
1893                 else {
1894                         return ($_[2] == 1 ? $_[0] : $_[1])
1895                 }
1896         };
1897 }
1898
1899 sub gettext {
1900         define_gettext();
1901         gettext(@_);
1902 }
1903
1904 sub ngettext {
1905         define_gettext();
1906         ngettext(@_);
1907 }
1908
1909 sub yesno ($) {
1910         my $val=shift;
1911
1912         return (defined $val && (lc($val) eq gettext("yes") || lc($val) eq "yes" || $val eq "1"));
1913 }
1914
1915 sub inject {
1916         # Injects a new function into the symbol table to replace an
1917         # exported function.
1918         my %params=@_;
1919
1920         # This is deep ugly perl foo, beware.
1921         no strict;
1922         no warnings;
1923         if (! defined $params{parent}) {
1924                 $params{parent}='::';
1925                 $params{old}=\&{$params{name}};
1926                 $params{name}=~s/.*:://;
1927         }
1928         my $parent=$params{parent};
1929         foreach my $ns (grep /^\w+::/, keys %{$parent}) {
1930                 $ns = $params{parent} . $ns;
1931                 inject(%params, parent => $ns) unless $ns eq '::main::';
1932                 *{$ns . $params{name}} = $params{call}
1933                         if exists ${$ns}{$params{name}} &&
1934                            \&{${$ns}{$params{name}}} == $params{old};
1935         }
1936         use strict;
1937         use warnings;
1938 }
1939
1940 sub add_link ($$;$) {
1941         my $page=shift;
1942         my $link=shift;
1943         my $type=shift;
1944
1945         push @{$links{$page}}, $link
1946                 unless grep { $_ eq $link } @{$links{$page}};
1947
1948         if (defined $type) {
1949                 $typedlinks{$page}{$type}{$link} = 1;
1950         }
1951 }
1952
1953 sub pagespec_translate ($) {
1954         my $spec=shift;
1955
1956         # Convert spec to perl code.
1957         my $code="";
1958         my @data;
1959         while ($spec=~m{
1960                 \s*             # ignore whitespace
1961                 (               # 1: match a single word
1962                         \!              # !
1963                 |
1964                         \(              # (
1965                 |
1966                         \)              # )
1967                 |
1968                         \w+\([^\)]*\)   # command(params)
1969                 |
1970                         [^\s()]+        # any other text
1971                 )
1972                 \s*             # ignore whitespace
1973         }gx) {
1974                 my $word=$1;
1975                 if (lc $word eq 'and') {
1976                         $code.=' &';
1977                 }
1978                 elsif (lc $word eq 'or') {
1979                         $code.=' |';
1980                 }
1981                 elsif ($word eq "(" || $word eq ")" || $word eq "!") {
1982                         $code.=' '.$word;
1983                 }
1984                 elsif ($word =~ /^(\w+)\((.*)\)$/) {
1985                         if (exists $IkiWiki::PageSpec::{"match_$1"}) {
1986                                 push @data, $2;
1987                                 $code.="IkiWiki::PageSpec::match_$1(\$page, \$data[$#data], \@_)";
1988                         }
1989                         else {
1990                                 push @data, qq{unknown function in pagespec "$word"};
1991                                 $code.="IkiWiki::ErrorReason->new(\$data[$#data])";
1992                         }
1993                 }
1994                 else {
1995                         push @data, $word;
1996                         $code.=" IkiWiki::PageSpec::match_glob(\$page, \$data[$#data], \@_)";
1997                 }
1998         }
1999
2000         if (! length $code) {
2001                 $code="IkiWiki::FailReason->new('empty pagespec')";
2002         }
2003
2004         no warnings;
2005         return eval 'sub { my $page=shift; '.$code.' }';
2006 }
2007
2008 sub pagespec_match ($$;@) {
2009         my $page=shift;
2010         my $spec=shift;
2011         my @params=@_;
2012
2013         # Backwards compatability with old calling convention.
2014         if (@params == 1) {
2015                 unshift @params, 'location';
2016         }
2017
2018         my $sub=pagespec_translate($spec);
2019         return IkiWiki::ErrorReason->new("syntax error in pagespec \"$spec\"")
2020                 if ! defined $sub;
2021         return $sub->($page, @params);
2022 }
2023
2024 sub pagespec_match_list ($$;@) {
2025         my $page=shift;
2026         my $pagespec=shift;
2027         my %params=@_;
2028
2029         # Backwards compatability with old calling convention.
2030         if (ref $page) {
2031                 print STDERR "warning: a plugin (".caller().") is using pagespec_match_list in an obsolete way, and needs to be updated\n";
2032                 $params{list}=$page;
2033                 $page=$params{location}; # ugh!
2034         }
2035
2036         my $sub=pagespec_translate($pagespec);
2037         error "syntax error in pagespec \"$pagespec\""
2038                 if ! defined $sub;
2039
2040         my @candidates;
2041         if (exists $params{list}) {
2042                 @candidates=exists $params{filter}
2043                         ? grep { ! $params{filter}->($_) } @{$params{list}}
2044                         : @{$params{list}};
2045         }
2046         else {
2047                 @candidates=exists $params{filter}
2048                         ? grep { ! $params{filter}->($_) } keys %pagesources
2049                         : keys %pagesources;
2050         }
2051
2052         if (defined $params{sort}) {
2053                 my $f;
2054                 if ($params{sort} eq 'title') {
2055                         $f=sub { pagetitle(basename($a)) cmp pagetitle(basename($b)) };
2056                 }
2057                 elsif ($params{sort} eq 'title_natural') {
2058                         eval q{use Sort::Naturally};
2059                         if ($@) {
2060                                 error(gettext("Sort::Naturally needed for title_natural sort"));
2061                         }
2062                         $f=sub { Sort::Naturally::ncmp(pagetitle(basename($a)), pagetitle(basename($b))) };
2063                 }
2064                 elsif ($params{sort} eq 'mtime') {
2065                         $f=sub { $pagemtime{$b} <=> $pagemtime{$a} };
2066                 }
2067                 elsif ($params{sort} eq 'age') {
2068                         $f=sub { $pagectime{$b} <=> $pagectime{$a} };
2069                 }
2070                 else {
2071                         error sprintf(gettext("unknown sort type %s"), $params{sort});
2072                 }
2073                 @candidates = sort { &$f } @candidates;
2074         }
2075
2076         @candidates=reverse(@candidates) if $params{reverse};
2077         
2078         $depends{$page}{$pagespec} |= ($params{deptype} || $DEPEND_CONTENT);
2079         
2080         # clear params, remainder is passed to pagespec
2081         my $num=$params{num};
2082         delete @params{qw{num deptype reverse sort filter list}};
2083         
2084         my @matches;
2085         my $firstfail;
2086         my $count=0;
2087         my $accum=IkiWiki::SuccessReason->new();
2088         foreach my $p (@candidates) {
2089                 my $r=$sub->($p, %params, location => $page);
2090                 error(sprintf(gettext("cannot match pages: %s"), $r))
2091                         if $r->isa("IkiWiki::ErrorReason");
2092                 $accum |= $r;
2093                 if ($r) {
2094                         push @matches, $p;
2095                         last if defined $num && ++$count == $num;
2096                 }
2097         }
2098
2099         # Add simple dependencies for accumulated influences.
2100         my $i=$accum->influences;
2101         foreach my $k (keys %$i) {
2102                 $depends_simple{$page}{lc $k} |= $i->{$k};
2103         }
2104
2105         return @matches;
2106 }
2107
2108 sub pagespec_valid ($) {
2109         my $spec=shift;
2110
2111         return defined pagespec_translate($spec);
2112 }
2113
2114 sub glob2re ($) {
2115         my $re=quotemeta(shift);
2116         $re=~s/\\\*/.*/g;
2117         $re=~s/\\\?/./g;
2118         return $re;
2119 }
2120
2121 package IkiWiki::FailReason;
2122
2123 use overload (
2124         '""'    => sub { $_[0][0] },
2125         '0+'    => sub { 0 },
2126         '!'     => sub { bless $_[0], 'IkiWiki::SuccessReason'},
2127         '&'     => sub { $_[0]->merge_influences($_[1], 1); $_[0] },
2128         '|'     => sub { $_[1]->merge_influences($_[0]); $_[1] },
2129         fallback => 1,
2130 );
2131
2132 our @ISA = 'IkiWiki::SuccessReason';
2133
2134 package IkiWiki::SuccessReason;
2135
2136 use overload (
2137         '""'    => sub { $_[0][0] },
2138         '0+'    => sub { 1 },
2139         '!'     => sub { bless $_[0], 'IkiWiki::FailReason'},
2140         '&'     => sub { $_[1]->merge_influences($_[0], 1); $_[1] },
2141         '|'     => sub { $_[0]->merge_influences($_[1]); $_[0] },
2142         fallback => 1,
2143 );
2144
2145 sub new {
2146         my $class = shift;
2147         my $value = shift;
2148         return bless [$value, {@_}], $class;
2149 }
2150
2151 sub influences {
2152         my $this=shift;
2153         $this->[1]={@_} if @_;
2154         my %i=%{$this->[1]};
2155         delete $i{""};
2156         return \%i;
2157 }
2158
2159 sub influences_static {
2160         return ! $_[0][1]->{""};
2161 }
2162
2163 sub merge_influences {
2164         my $this=shift;
2165         my $other=shift;
2166         my $anded=shift;
2167
2168         if (! $anded || (($this || %{$this->[1]}) &&
2169                         ($other || %{$other->[1]}))) {
2170                 foreach my $influence (keys %{$other->[1]}) {
2171                         $this->[1]{$influence} |= $other->[1]{$influence};
2172                 }
2173         }
2174         else {
2175                 # influence blocker
2176                 $this->[1]={};
2177         }
2178 }
2179
2180 package IkiWiki::ErrorReason;
2181
2182 our @ISA = 'IkiWiki::FailReason';
2183
2184 package IkiWiki::PageSpec;
2185
2186 sub derel ($$) {
2187         my $path=shift;
2188         my $from=shift;
2189
2190         if ($path =~ m!^\./!) {
2191                 $from=~s#/?[^/]+$## if defined $from;
2192                 $path=~s#^\./##;
2193                 $path="$from/$path" if length $from;
2194         }
2195
2196         return $path;
2197 }
2198
2199 sub match_glob ($$;@) {
2200         my $page=shift;
2201         my $glob=shift;
2202         my %params=@_;
2203         
2204         $glob=derel($glob, $params{location});
2205
2206         my $regexp=IkiWiki::glob2re($glob);
2207         if ($page=~/^$regexp$/i) {
2208                 if (! IkiWiki::isinternal($page) || $params{internal}) {
2209                         return IkiWiki::SuccessReason->new("$glob matches $page");
2210                 }
2211                 else {
2212                         return IkiWiki::FailReason->new("$glob matches $page, but the page is an internal page");
2213                 }
2214         }
2215         else {
2216                 return IkiWiki::FailReason->new("$glob does not match $page");
2217         }
2218 }
2219
2220 sub match_internal ($$;@) {
2221         return match_glob($_[0], $_[1], @_, internal => 1)
2222 }
2223
2224 sub match_link ($$;@) {
2225         my $page=shift;
2226         my $link=lc(shift);
2227         my %params=@_;
2228
2229         $link=derel($link, $params{location});
2230         my $from=exists $params{location} ? $params{location} : '';
2231         my $linktype=$params{linktype};
2232         my $qualifier='';
2233         if (defined $linktype) {
2234                 $qualifier=" with type $linktype";
2235         }
2236
2237         my $links = $IkiWiki::links{$page};
2238         return IkiWiki::FailReason->new("$page has no links", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
2239                 unless $links && @{$links};
2240         my $bestlink = IkiWiki::bestlink($from, $link);
2241         foreach my $p (@{$links}) {
2242                 if (length $bestlink) {
2243                         if ((!defined $linktype || exists $IkiWiki::typedlinks{$page}{$linktype}{$p}) && $bestlink eq IkiWiki::bestlink($page, $p)) {
2244                                 return IkiWiki::SuccessReason->new("$page links to $link$qualifier", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
2245                         }
2246                 }
2247                 else {
2248                         if ((!defined $linktype || exists $IkiWiki::typedlinks{$page}{$linktype}{$p}) && match_glob($p, $link, %params)) {
2249                                 return IkiWiki::SuccessReason->new("$page links to page $p$qualifier, matching $link", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
2250                         }
2251                         my ($p_rel)=$p=~/^\/?(.*)/;
2252                         $link=~s/^\///;
2253                         if ((!defined $linktype || exists $IkiWiki::typedlinks{$page}{$linktype}{$p_rel}) && match_glob($p_rel, $link, %params)) {
2254                                 return IkiWiki::SuccessReason->new("$page links to page $p_rel$qualifier, matching $link", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
2255                         }
2256                 }
2257         }
2258         return IkiWiki::FailReason->new("$page does not link to $link$qualifier", $page => $IkiWiki::DEPEND_LINKS, "" => 1);
2259 }
2260
2261 sub match_backlink ($$;@) {
2262         my $ret=match_link($_[1], $_[0], @_);
2263         $ret->influences($_[1] => $IkiWiki::DEPEND_LINKS);
2264         return $ret;
2265 }
2266
2267 sub match_created_before ($$;@) {
2268         my $page=shift;
2269         my $testpage=shift;
2270         my %params=@_;
2271         
2272         $testpage=derel($testpage, $params{location});
2273
2274         if (exists $IkiWiki::pagectime{$testpage}) {
2275                 if ($IkiWiki::pagectime{$page} < $IkiWiki::pagectime{$testpage}) {
2276                         return IkiWiki::SuccessReason->new("$page created before $testpage", $testpage => $IkiWiki::DEPEND_PRESENCE);
2277                 }
2278                 else {
2279                         return IkiWiki::FailReason->new("$page not created before $testpage", $testpage => $IkiWiki::DEPEND_PRESENCE);
2280                 }
2281         }
2282         else {
2283                 return IkiWiki::ErrorReason->new("$testpage does not exist", $testpage => $IkiWiki::DEPEND_PRESENCE);
2284         }
2285 }
2286
2287 sub match_created_after ($$;@) {
2288         my $page=shift;
2289         my $testpage=shift;
2290         my %params=@_;
2291         
2292         $testpage=derel($testpage, $params{location});
2293
2294         if (exists $IkiWiki::pagectime{$testpage}) {
2295                 if ($IkiWiki::pagectime{$page} > $IkiWiki::pagectime{$testpage}) {
2296                         return IkiWiki::SuccessReason->new("$page created after $testpage", $testpage => $IkiWiki::DEPEND_PRESENCE);
2297                 }
2298                 else {
2299                         return IkiWiki::FailReason->new("$page not created after $testpage", $testpage => $IkiWiki::DEPEND_PRESENCE);
2300                 }
2301         }
2302         else {
2303                 return IkiWiki::ErrorReason->new("$testpage does not exist", $testpage => $IkiWiki::DEPEND_PRESENCE);
2304         }
2305 }
2306
2307 sub match_creation_day ($$;@) {
2308         if ((gmtime($IkiWiki::pagectime{shift()}))[3] == shift) {
2309                 return IkiWiki::SuccessReason->new('creation_day matched');
2310         }
2311         else {
2312                 return IkiWiki::FailReason->new('creation_day did not match');
2313         }
2314 }
2315
2316 sub match_creation_month ($$;@) {
2317         if ((gmtime($IkiWiki::pagectime{shift()}))[4] + 1 == shift) {
2318                 return IkiWiki::SuccessReason->new('creation_month matched');
2319         }
2320         else {
2321                 return IkiWiki::FailReason->new('creation_month did not match');
2322         }
2323 }
2324
2325 sub match_creation_year ($$;@) {
2326         if ((gmtime($IkiWiki::pagectime{shift()}))[5] + 1900 == shift) {
2327                 return IkiWiki::SuccessReason->new('creation_year matched');
2328         }
2329         else {
2330                 return IkiWiki::FailReason->new('creation_year did not match');
2331         }
2332 }
2333
2334 sub match_user ($$;@) {
2335         shift;
2336         my $user=shift;
2337         my %params=@_;
2338         
2339         my $regexp=IkiWiki::glob2re($user);
2340         
2341         if (! exists $params{user}) {
2342                 return IkiWiki::ErrorReason->new("no user specified");
2343         }
2344
2345         if (defined $params{user} && $params{user}=~/^$regexp$/i) {
2346                 return IkiWiki::SuccessReason->new("user is $user");
2347         }
2348         elsif (! defined $params{user}) {
2349                 return IkiWiki::FailReason->new("not logged in");
2350         }
2351         else {
2352                 return IkiWiki::FailReason->new("user is $params{user}, not $user");
2353         }
2354 }
2355
2356 sub match_admin ($$;@) {
2357         shift;
2358         shift;
2359         my %params=@_;
2360         
2361         if (! exists $params{user}) {
2362                 return IkiWiki::ErrorReason->new("no user specified");
2363         }
2364
2365         if (defined $params{user} && IkiWiki::is_admin($params{user})) {
2366                 return IkiWiki::SuccessReason->new("user is an admin");
2367         }
2368         elsif (! defined $params{user}) {
2369                 return IkiWiki::FailReason->new("not logged in");
2370         }
2371         else {
2372                 return IkiWiki::FailReason->new("user is not an admin");
2373         }
2374 }
2375
2376 sub match_ip ($$;@) {
2377         shift;
2378         my $ip=shift;
2379         my %params=@_;
2380         
2381         if (! exists $params{ip}) {
2382                 return IkiWiki::ErrorReason->new("no IP specified");
2383         }
2384
2385         if (defined $params{ip} && lc $params{ip} eq lc $ip) {
2386                 return IkiWiki::SuccessReason->new("IP is $ip");
2387         }
2388         else {
2389                 return IkiWiki::FailReason->new("IP is $params{ip}, not $ip");
2390         }
2391 }
2392
2393 1