partial support for calling onload once the DOM is ready
[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 %hooks %forcerebuild
17             $gettext_obj %loaded_plugins};
18
19 use Exporter q{import};
20 our @EXPORT = qw(hook debug error template htmlpage add_depends pagespec_match
21                  bestlink htmllink readfile writefile pagetype srcfile pagename
22                  displaytime will_render gettext urlto targetpage
23                  add_underlay pagetitle titlepage linkpage newpagefile
24                  %config %links %pagestate %wikistate %renderedfiles
25                  %pagesources %destsources);
26 our $VERSION = 2.00; # plugin interface version, next is ikiwiki version
27 our $version='unknown'; # VERSION_AUTOREPLACE done by Makefile, DNE
28 my $installdir=''; # INSTALLDIR_AUTOREPLACE done by Makefile, DNE
29
30 # Optimisation.
31 use Memoize;
32 memoize("abs2rel");
33 memoize("pagespec_translate");
34 memoize("file_pruned");
35
36 sub getsetup () { #{{{
37         wikiname => {
38                 type => "string",
39                 default => "wiki",
40                 description => "name of the wiki",
41                 safe => 1,
42                 rebuild => 1,
43         },
44         adminemail => {
45                 type => "string",
46                 default => undef,
47                 example => 'me@example.com',
48                 description => "contact email for wiki",
49                 safe => 1,
50                 rebuild => 0,
51         },
52         adminuser => {
53                 type => "string",
54                 default => [],
55                 description => "users who are wiki admins",
56                 safe => 1,
57                 rebuild => 0,
58         },
59         banned_users => {
60                 type => "string",
61                 default => [],
62                 description => "users who are banned from the wiki",
63                 safe => 1,
64                 rebuild => 0,
65         },
66         srcdir => {
67                 type => "string",
68                 default => undef,
69                 example => "$ENV{HOME}/wiki",
70                 description => "where the source of the wiki is located",
71                 safe => 0, # path
72                 rebuild => 1,
73         },
74         destdir => {
75                 type => "string",
76                 default => undef,
77                 example => "/var/www/wiki",
78                 description => "where to build the wiki",
79                 safe => 0, # path
80                 rebuild => 1,
81         },
82         url => {
83                 type => "string",
84                 default => '',
85                 example => "http://example.com/wiki",
86                 description => "base url to the wiki",
87                 safe => 1,
88                 rebuild => 1,
89         },
90         cgiurl => {
91                 type => "string",
92                 default => '',
93                 example => "http://example.com/wiki/ikiwiki.cgi",
94                 description => "url to the ikiwiki.cgi",
95                 safe => 1,
96                 rebuild => 1,
97         },
98         cgi_wrapper => {
99                 type => "string",
100                 default => '',
101                 example => "/var/www/wiki/ikiwiki.cgi",
102                 description => "cgi wrapper to generate",
103                 safe => 0, # file
104                 rebuild => 0,
105         },
106         cgi_wrappermode => {
107                 type => "string",
108                 default => '06755',
109                 description => "mode for cgi_wrapper (can safely be made suid)",
110                 safe => 0,
111                 rebuild => 0,
112         },
113         rcs => {
114                 type => "string",
115                 default => '',
116                 description => "rcs backend to use",
117                 safe => 0, # don't allow overriding
118                 rebuild => 0,
119         },
120         default_plugins => {
121                 type => "internal",
122                 default => [qw{mdwn link inline htmlscrubber passwordauth
123                                 openid signinedit lockedit conditional
124                                 recentchanges parentlinks editpage}],
125                 description => "plugins to enable by default",
126                 safe => 0,
127                 rebuild => 1,
128         },
129         add_plugins => {
130                 type => "string",
131                 default => [],
132                 description => "plugins to add to the default configuration",
133                 safe => 1,
134                 rebuild => 1,
135         },
136         disable_plugins => {
137                 type => "string",
138                 default => [],
139                 description => "plugins to disable",
140                 safe => 1,
141                 rebuild => 1,
142         },
143         templatedir => {
144                 type => "string",
145                 default => "$installdir/share/ikiwiki/templates",
146                 description => "location of template files",
147                 advanced => 1,
148                 safe => 0, # path
149                 rebuild => 1,
150         },
151         underlaydir => {
152                 type => "string",
153                 default => "$installdir/share/ikiwiki/basewiki",
154                 description => "base wiki source location",
155                 advanced => 1,
156                 safe => 0, # path
157                 rebuild => 0,
158         },
159         wrappers => {
160                 type => "internal",
161                 default => [],
162                 description => "wrappers to generate",
163                 safe => 0,
164                 rebuild => 0,
165         },
166         underlaydirs => {
167                 type => "internal",
168                 default => [],
169                 description => "additional underlays to use",
170                 safe => 0,
171                 rebuild => 0,
172         },
173         verbose => {
174                 type => "boolean",
175                 example => 1,
176                 description => "display verbose messages when building?",
177                 safe => 1,
178                 rebuild => 0,
179         },
180         syslog => {
181                 type => "boolean",
182                 example => 1,
183                 description => "log to syslog?",
184                 safe => 1,
185                 rebuild => 0,
186         },
187         usedirs => {
188                 type => "boolean",
189                 default => 1,
190                 description => "create output files named page/index.html?",
191                 safe => 0, # changing requires manual transition
192                 rebuild => 1,
193         },
194         prefix_directives => {
195                 type => "boolean",
196                 default => 0,
197                 description => "use '!'-prefixed preprocessor directives?",
198                 safe => 0, # changing requires manual transition
199                 rebuild => 1,
200         },
201         indexpages => {
202                 type => "boolean",
203                 default => 0,
204                 description => "use page/index.mdwn source files",
205                 safe => 1,
206                 rebuild => 1,
207         },
208         discussion => {
209                 type => "boolean",
210                 default => 1,
211                 description => "enable Discussion pages?",
212                 safe => 1,
213                 rebuild => 1,
214         },
215         sslcookie => {
216                 type => "boolean",
217                 default => 0,
218                 description => "only send cookies over SSL connections?",
219                 advanced => 1,
220                 safe => 1,
221                 rebuild => 0,
222         },
223         default_pageext => {
224                 type => "string",
225                 default => "mdwn",
226                 description => "extension to use for new pages",
227                 safe => 0, # not sanitized
228                 rebuild => 0,
229         },
230         htmlext => {
231                 type => "string",
232                 default => "html",
233                 description => "extension to use for html files",
234                 safe => 0, # not sanitized
235                 rebuild => 1,
236         },
237         timeformat => {
238                 type => "string",
239                 default => '%c',
240                 description => "strftime format string to display date",
241                 advanced => 1,
242                 safe => 1,
243                 rebuild => 1,
244         },
245         locale => {
246                 type => "string",
247                 default => undef,
248                 example => "en_US.UTF-8",
249                 description => "UTF-8 locale to use",
250                 advanced => 1,
251                 safe => 0,
252                 rebuild => 1,
253         },
254         userdir => {
255                 type => "string",
256                 default => "",
257                 example => "users",
258                 description => "put user pages below specified page",
259                 safe => 1,
260                 rebuild => 1,
261         },
262         numbacklinks => {
263                 type => "integer",
264                 default => 10,
265                 description => "how many backlinks to show before hiding excess (0 to show all)",
266                 safe => 1,
267                 rebuild => 1,
268         },
269         hardlink => {
270                 type => "boolean",
271                 default => 0,
272                 description => "attempt to hardlink source files? (optimisation for large files)",
273                 advanced => 1,
274                 safe => 0, # paranoia
275                 rebuild => 0,
276         },
277         umask => {
278                 type => "integer",
279                 description => "",
280                 example => "022",
281                 description => "force ikiwiki to use a particular umask",
282                 advanced => 1,
283                 safe => 0, # paranoia
284                 rebuild => 0,
285         },
286         libdir => {
287                 type => "string",
288                 default => "",
289                 example => "$ENV{HOME}/.ikiwiki/",
290                 description => "extra library and plugin directory",
291                 advanced => 1,
292                 safe => 0, # directory
293                 rebuild => 0,
294         },
295         ENV => {
296                 type => "string", 
297                 default => {},
298                 description => "environment variables",
299                 safe => 0, # paranoia
300                 rebuild => 0,
301         },
302         exclude => {
303                 type => "string",
304                 default => undef,
305                 example => '\.wav$',
306                 description => "regexp of source files to ignore",
307                 advanced => 1,
308                 safe => 0, # regexp
309                 rebuild => 1,
310         },
311         wiki_file_prune_regexps => {
312                 type => "internal",
313                 default => [qr/(^|\/)\.\.(\/|$)/, qr/^\./, qr/\/\./,
314                         qr/\.x?html?$/, qr/\.ikiwiki-new$/,
315                         qr/(^|\/).svn\//, qr/.arch-ids\//, qr/{arch}\//,
316                         qr/(^|\/)_MTN\//,
317                         qr/\.dpkg-tmp$/],
318                 description => "regexps of source files to ignore",
319                 safe => 0,
320                 rebuild => 1,
321         },
322         wiki_file_chars => {
323                 type => "string",
324                 description => "specifies the characters that are allowed in source filenames",
325                 default => "-[:alnum:]+/.:_",
326                 safe => 0,
327                 rebuild => 1,
328         },
329         wiki_file_regexp => {
330                 type => "internal",
331                 description => "regexp of legal source files",
332                 safe => 0,
333                 rebuild => 1,
334         },
335         web_commit_regexp => {
336                 type => "internal",
337                 default => qr/^web commit (by (.*?(?=: |$))|from (\d+\.\d+\.\d+\.\d+)):?(.*)/,
338                 description => "regexp to parse web commits from logs",
339                 safe => 0,
340                 rebuild => 0,
341         },
342         cgi => {
343                 type => "internal",
344                 default => 0,
345                 description => "run as a cgi",
346                 safe => 0,
347                 rebuild => 0,
348         },
349         cgi_disable_uploads => {
350                 type => "internal",
351                 default => 1,
352                 description => "whether CGI should accept file uploads",
353                 safe => 0,
354                 rebuild => 0,
355         },
356         post_commit => {
357                 type => "internal",
358                 default => 0,
359                 description => "run as a post-commit hook",
360                 safe => 0,
361                 rebuild => 0,
362         },
363         rebuild => {
364                 type => "internal",
365                 default => 0,
366                 description => "running in rebuild mode",
367                 safe => 0,
368                 rebuild => 0,
369         },
370         setup => {
371                 type => "internal",
372                 default => undef,
373                 description => "running in setup mode",
374                 safe => 0,
375                 rebuild => 0,
376         },
377         refresh => {
378                 type => "internal",
379                 default => 0,
380                 description => "running in refresh mode",
381                 safe => 0,
382                 rebuild => 0,
383         },
384         getctime => {
385                 type => "internal",
386                 default => 0,
387                 description => "running in getctime mode",
388                 safe => 0,
389                 rebuild => 0,
390         },
391         w3mmode => {
392                 type => "internal",
393                 default => 0,
394                 description => "running in w3mmode",
395                 safe => 0,
396                 rebuild => 0,
397         },
398         setupfile => {
399                 type => "internal",
400                 default => undef,
401                 description => "path to setup file",
402                 safe => 0,
403                 rebuild => 0,
404         },
405         allow_symlinks_before_srcdir => {
406                 type => "string",
407                 default => 0,
408                 description => "allow symlinks in the path leading to the srcdir (potentially insecure)",
409                 safe => 0,
410                 rebuild => 0,
411         },
412 } #}}}
413
414 sub defaultconfig () { #{{{
415         my %s=getsetup();
416         my @ret;
417         foreach my $key (keys %s) {
418                 push @ret, $key, $s{$key}->{default};
419         }
420         use Data::Dumper;
421         return @ret;
422 } #}}}
423
424 sub checkconfig () { #{{{
425         # locale stuff; avoid LC_ALL since it overrides everything
426         if (defined $ENV{LC_ALL}) {
427                 $ENV{LANG} = $ENV{LC_ALL};
428                 delete $ENV{LC_ALL};
429         }
430         if (defined $config{locale}) {
431                 if (POSIX::setlocale(&POSIX::LC_ALL, $config{locale})) {
432                         $ENV{LANG}=$config{locale};
433                         $gettext_obj=undef;
434                 }
435         }
436                 
437         if (! defined $config{wiki_file_regexp}) {
438                 $config{wiki_file_regexp}=qr/(^[$config{wiki_file_chars}]+$)/;
439         }
440
441         if (ref $config{ENV} eq 'HASH') {
442                 foreach my $val (keys %{$config{ENV}}) {
443                         $ENV{$val}=$config{ENV}{$val};
444                 }
445         }
446
447         if ($config{w3mmode}) {
448                 eval q{use Cwd q{abs_path}};
449                 error($@) if $@;
450                 $config{srcdir}=possibly_foolish_untaint(abs_path($config{srcdir}));
451                 $config{destdir}=possibly_foolish_untaint(abs_path($config{destdir}));
452                 $config{cgiurl}="file:///\$LIB/ikiwiki-w3m.cgi/".$config{cgiurl}
453                         unless $config{cgiurl} =~ m!file:///!;
454                 $config{url}="file://".$config{destdir};
455         }
456
457         if ($config{cgi} && ! length $config{url}) {
458                 error(gettext("Must specify url to wiki with --url when using --cgi"));
459         }
460         
461         $config{wikistatedir}="$config{srcdir}/.ikiwiki"
462                 unless exists $config{wikistatedir};
463
464         if (defined $config{umask}) {
465                 umask(possibly_foolish_untaint($config{umask}));
466         }
467
468         run_hooks(checkconfig => sub { shift->() });
469
470         return 1;
471 } #}}}
472
473 sub listplugins () { #{{{
474         my %ret;
475
476         foreach my $dir (@INC, $config{libdir}) {
477                 next unless defined $dir && length $dir;
478                 foreach my $file (glob("$dir/IkiWiki/Plugin/*.pm")) {
479                         my ($plugin)=$file=~/.*\/(.*)\.pm$/;
480                         $ret{$plugin}=1;
481                 }
482         }
483         foreach my $dir ($config{libdir}, "$installdir/lib/ikiwiki") {
484                 next unless defined $dir && length $dir;
485                 foreach my $file (glob("$dir/plugins/*")) {
486                         $ret{basename($file)}=1 if -x $file;
487                 }
488         }
489
490         return keys %ret;
491 } #}}}
492
493 sub loadplugins () { #{{{
494         if (defined $config{libdir} && length $config{libdir}) {
495                 unshift @INC, possibly_foolish_untaint($config{libdir});
496         }
497
498         foreach my $plugin (@{$config{default_plugins}}, @{$config{add_plugins}}) {
499                 loadplugin($plugin);
500         }
501         
502         if ($config{rcs}) {
503                 if (exists $IkiWiki::hooks{rcs}) {
504                         error(gettext("cannot use multiple rcs plugins"));
505                 }
506                 loadplugin($config{rcs});
507         }
508         if (! exists $IkiWiki::hooks{rcs}) {
509                 loadplugin("norcs");
510         }
511
512         run_hooks(getopt => sub { shift->() });
513         if (grep /^-/, @ARGV) {
514                 print STDERR "Unknown option: $_\n"
515                         foreach grep /^-/, @ARGV;
516                 usage();
517         }
518
519         return 1;
520 } #}}}
521
522 sub loadplugin ($) { #{{{
523         my $plugin=shift;
524
525         return if grep { $_ eq $plugin} @{$config{disable_plugins}};
526
527         foreach my $dir (defined $config{libdir} ? possibly_foolish_untaint($config{libdir}) : undef,
528                          "$installdir/lib/ikiwiki") {
529                 if (defined $dir && -x "$dir/plugins/$plugin") {
530                         eval { require IkiWiki::Plugin::external };
531                         if ($@) {
532                                 my $reason=$@;
533                                 error(sprintf(gettext("failed to load external plugin needed for %s plugin: %s"), $plugin, $reason));
534                         }
535                         import IkiWiki::Plugin::external "$dir/plugins/$plugin";
536                         $loaded_plugins{$plugin}=1;
537                         return 1;
538                 }
539         }
540
541         my $mod="IkiWiki::Plugin::".possibly_foolish_untaint($plugin);
542         eval qq{use $mod};
543         if ($@) {
544                 error("Failed to load plugin $mod: $@");
545         }
546         $loaded_plugins{$plugin}=1;
547         return 1;
548 } #}}}
549
550 sub error ($;$) { #{{{
551         my $message=shift;
552         my $cleaner=shift;
553         log_message('err' => $message) if $config{syslog};
554         if (defined $cleaner) {
555                 $cleaner->();
556         }
557         die $message."\n";
558 } #}}}
559
560 sub debug ($) { #{{{
561         return unless $config{verbose};
562         return log_message(debug => @_);
563 } #}}}
564
565 my $log_open=0;
566 sub log_message ($$) { #{{{
567         my $type=shift;
568
569         if ($config{syslog}) {
570                 require Sys::Syslog;
571                 if (! $log_open) {
572                         Sys::Syslog::setlogsock('unix');
573                         Sys::Syslog::openlog('ikiwiki', '', 'user');
574                         $log_open=1;
575                 }
576                 return eval {
577                         Sys::Syslog::syslog($type, "[$config{wikiname}] %s", join(" ", @_));
578                 };
579         }
580         elsif (! $config{cgi}) {
581                 return print "@_\n";
582         }
583         else {
584                 return print STDERR "@_\n";
585         }
586 } #}}}
587
588 sub possibly_foolish_untaint ($) { #{{{
589         my $tainted=shift;
590         my ($untainted)=$tainted=~/(.*)/s;
591         return $untainted;
592 } #}}}
593
594 sub basename ($) { #{{{
595         my $file=shift;
596
597         $file=~s!.*/+!!;
598         return $file;
599 } #}}}
600
601 sub dirname ($) { #{{{
602         my $file=shift;
603
604         $file=~s!/*[^/]+$!!;
605         return $file;
606 } #}}}
607
608 sub pagetype ($) { #{{{
609         my $page=shift;
610         
611         if ($page =~ /\.([^.]+)$/) {
612                 return $1 if exists $hooks{htmlize}{$1};
613         }
614         return;
615 } #}}}
616
617 sub isinternal ($) { #{{{
618         my $page=shift;
619         return exists $pagesources{$page} &&
620                 $pagesources{$page} =~ /\._([^.]+)$/;
621 } #}}}
622
623 sub pagename ($) { #{{{
624         my $file=shift;
625
626         my $type=pagetype($file);
627         my $page=$file;
628         $page=~s/\Q.$type\E*$// if defined $type && !$hooks{htmlize}{$type}{keepextension};
629         if ($config{indexpages} && $page=~/(.*)\/index$/) {
630                 $page=$1;
631         }
632         return $page;
633 } #}}}
634
635 sub newpagefile ($$) { #{{{
636         my $page=shift;
637         my $type=shift;
638
639         if (! $config{indexpages} || $page eq 'index') {
640                 return $page.".".$type;
641         }
642         else {
643                 return $page."/index.".$type;
644         }
645 } #}}}
646
647 sub targetpage ($$) { #{{{
648         my $page=shift;
649         my $ext=shift;
650         
651         if (! $config{usedirs} || $page eq 'index') {
652                 return $page.".".$ext;
653         }
654         else {
655                 return $page."/index.".$ext;
656         }
657 } #}}}
658
659 sub htmlpage ($) { #{{{
660         my $page=shift;
661         
662         return targetpage($page, $config{htmlext});
663 } #}}}
664
665 sub srcfile_stat { #{{{
666         my $file=shift;
667         my $nothrow=shift;
668
669         return "$config{srcdir}/$file", stat(_) if -e "$config{srcdir}/$file";
670         foreach my $dir (@{$config{underlaydirs}}, $config{underlaydir}) {
671                 return "$dir/$file", stat(_) if -e "$dir/$file";
672         }
673         error("internal error: $file cannot be found in $config{srcdir} or underlay") unless $nothrow;
674         return;
675 } #}}}
676
677 sub srcfile ($;$) { #{{{
678         return (srcfile_stat(@_))[0];
679 } #}}}
680
681 sub add_underlay ($) { #{{{
682         my $dir=shift;
683
684         if ($dir !~ /^\//) {
685                 $dir="$config{underlaydir}/../$dir";
686         }
687
688         if (! grep { $_ eq $dir } @{$config{underlaydirs}}) {
689                 unshift @{$config{underlaydirs}}, $dir;
690         }
691
692         return 1;
693 } #}}}
694
695 sub readfile ($;$$) { #{{{
696         my $file=shift;
697         my $binary=shift;
698         my $wantfd=shift;
699
700         if (-l $file) {
701                 error("cannot read a symlink ($file)");
702         }
703         
704         local $/=undef;
705         open (my $in, "<", $file) || error("failed to read $file: $!");
706         binmode($in) if ($binary);
707         return \*$in if $wantfd;
708         my $ret=<$in>;
709         close $in || error("failed to read $file: $!");
710         return $ret;
711 } #}}}
712
713 sub prep_writefile ($$) { #{{{
714         my $file=shift;
715         my $destdir=shift;
716         
717         my $test=$file;
718         while (length $test) {
719                 if (-l "$destdir/$test") {
720                         error("cannot write to a symlink ($test)");
721                 }
722                 $test=dirname($test);
723         }
724
725         my $dir=dirname("$destdir/$file");
726         if (! -d $dir) {
727                 my $d="";
728                 foreach my $s (split(m!/+!, $dir)) {
729                         $d.="$s/";
730                         if (! -d $d) {
731                                 mkdir($d) || error("failed to create directory $d: $!");
732                         }
733                 }
734         }
735
736         return 1;
737 } #}}}
738
739 sub writefile ($$$;$$) { #{{{
740         my $file=shift; # can include subdirs
741         my $destdir=shift; # directory to put file in
742         my $content=shift;
743         my $binary=shift;
744         my $writer=shift;
745         
746         prep_writefile($file, $destdir);
747         
748         my $newfile="$destdir/$file.ikiwiki-new";
749         if (-l $newfile) {
750                 error("cannot write to a symlink ($newfile)");
751         }
752         
753         my $cleanup = sub { unlink($newfile) };
754         open (my $out, '>', $newfile) || error("failed to write $newfile: $!", $cleanup);
755         binmode($out) if ($binary);
756         if ($writer) {
757                 $writer->(\*$out, $cleanup);
758         }
759         else {
760                 print $out $content or error("failed writing to $newfile: $!", $cleanup);
761         }
762         close $out || error("failed saving $newfile: $!", $cleanup);
763         rename($newfile, "$destdir/$file") || 
764                 error("failed renaming $newfile to $destdir/$file: $!", $cleanup);
765
766         return 1;
767 } #}}}
768
769 my %cleared;
770 sub will_render ($$;$) { #{{{
771         my $page=shift;
772         my $dest=shift;
773         my $clear=shift;
774
775         # Important security check.
776         if (-e "$config{destdir}/$dest" && ! $config{rebuild} &&
777             ! grep { $_ eq $dest } (@{$renderedfiles{$page}}, @{$oldrenderedfiles{$page}}, @{$wikistate{editpage}{previews}})) {
778                 error("$config{destdir}/$dest independently created, not overwriting with version from $page");
779         }
780
781         if (! $clear || $cleared{$page}) {
782                 $renderedfiles{$page}=[$dest, grep { $_ ne $dest } @{$renderedfiles{$page}}];
783         }
784         else {
785                 foreach my $old (@{$renderedfiles{$page}}) {
786                         delete $destsources{$old};
787                 }
788                 $renderedfiles{$page}=[$dest];
789                 $cleared{$page}=1;
790         }
791         $destsources{$dest}=$page;
792
793         return 1;
794 } #}}}
795
796 sub bestlink ($$) { #{{{
797         my $page=shift;
798         my $link=shift;
799         
800         my $cwd=$page;
801         if ($link=~s/^\/+//) {
802                 # absolute links
803                 $cwd="";
804         }
805         $link=~s/\/$//;
806
807         do {
808                 my $l=$cwd;
809                 $l.="/" if length $l;
810                 $l.=$link;
811
812                 if (exists $links{$l}) {
813                         return $l;
814                 }
815                 elsif (exists $pagecase{lc $l}) {
816                         return $pagecase{lc $l};
817                 }
818         } while $cwd=~s{/?[^/]+$}{};
819
820         if (length $config{userdir}) {
821                 my $l = "$config{userdir}/".lc($link);
822                 if (exists $links{$l}) {
823                         return $l;
824                 }
825                 elsif (exists $pagecase{lc $l}) {
826                         return $pagecase{lc $l};
827                 }
828         }
829
830         #print STDERR "warning: page $page, broken link: $link\n";
831         return "";
832 } #}}}
833
834 sub isinlinableimage ($) { #{{{
835         my $file=shift;
836         
837         return $file =~ /\.(png|gif|jpg|jpeg)$/i;
838 } #}}}
839
840 sub pagetitle ($;$) { #{{{
841         my $page=shift;
842         my $unescaped=shift;
843
844         if ($unescaped) {
845                 $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : chr($2)/eg;
846         }
847         else {
848                 $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : "&#$2;"/eg;
849         }
850
851         return $page;
852 } #}}}
853
854 sub titlepage ($) { #{{{
855         my $title=shift;
856         # support use w/o %config set
857         my $chars = defined $config{wiki_file_chars} ? $config{wiki_file_chars} : "-[:alnum:]+/.:_";
858         $title=~s/([^$chars]|_)/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
859         return $title;
860 } #}}}
861
862 sub linkpage ($) { #{{{
863         my $link=shift;
864         my $chars = defined $config{wiki_file_chars} ? $config{wiki_file_chars} : "-[:alnum:]+/.:_";
865         $link=~s/([^$chars])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
866         return $link;
867 } #}}}
868
869 sub cgiurl (@) { #{{{
870         my %params=@_;
871
872         return $config{cgiurl}."?".
873                 join("&amp;", map $_."=".uri_escape_utf8($params{$_}), keys %params);
874 } #}}}
875
876 sub baseurl (;$) { #{{{
877         my $page=shift;
878
879         return "$config{url}/" if ! defined $page;
880         
881         $page=htmlpage($page);
882         $page=~s/[^\/]+$//;
883         $page=~s/[^\/]+\//..\//g;
884         return $page;
885 } #}}}
886
887 sub abs2rel ($$) { #{{{
888         # Work around very innefficient behavior in File::Spec if abs2rel
889         # is passed two relative paths. It's much faster if paths are
890         # absolute! (Debian bug #376658; fixed in debian unstable now)
891         my $path="/".shift;
892         my $base="/".shift;
893
894         require File::Spec;
895         my $ret=File::Spec->abs2rel($path, $base);
896         $ret=~s/^// if defined $ret;
897         return $ret;
898 } #}}}
899
900 sub displaytime ($;$) { #{{{
901         my $time=shift;
902         my $format=shift;
903         if (! defined $format) {
904                 $format=$config{timeformat};
905         }
906
907         # strftime doesn't know about encodings, so make sure
908         # its output is properly treated as utf8
909         return decode_utf8(POSIX::strftime($format, localtime($time)));
910 } #}}}
911
912 sub beautify_urlpath ($) { #{{{
913         my $url=shift;
914
915         if ($config{usedirs}) {
916                 $url =~ s!/index.$config{htmlext}$!/!;
917         }
918
919         # Ensure url is not an empty link, and
920         # if it's relative, make that explicit to avoid colon confusion.
921         if ($url !~ /^\//) {
922                 $url="./$url";
923         }
924
925         return $url;
926 } #}}}
927
928 sub urlto ($$;$) { #{{{
929         my $to=shift;
930         my $from=shift;
931         my $absolute=shift;
932         
933         if (! length $to) {
934                 return beautify_urlpath(baseurl($from)."index.$config{htmlext}");
935         }
936
937         if (! $destsources{$to}) {
938                 $to=htmlpage($to);
939         }
940
941         if ($absolute) {
942                 return $config{url}.beautify_urlpath("/".$to);
943         }
944
945         my $link = abs2rel($to, dirname(htmlpage($from)));
946
947         return beautify_urlpath($link);
948 } #}}}
949
950 sub htmllink ($$$;@) { #{{{
951         my $lpage=shift; # the page doing the linking
952         my $page=shift; # the page that will contain the link (different for inline)
953         my $link=shift;
954         my %opts=@_;
955
956         $link=~s/\/$//;
957
958         my $bestlink;
959         if (! $opts{forcesubpage}) {
960                 $bestlink=bestlink($lpage, $link);
961         }
962         else {
963                 $bestlink="$lpage/".lc($link);
964         }
965
966         my $linktext;
967         if (defined $opts{linktext}) {
968                 $linktext=$opts{linktext};
969         }
970         else {
971                 $linktext=pagetitle(basename($link));
972         }
973         
974         return "<span class=\"selflink\">$linktext</span>"
975                 if length $bestlink && $page eq $bestlink &&
976                    ! defined $opts{anchor};
977         
978         if (! $destsources{$bestlink}) {
979                 $bestlink=htmlpage($bestlink);
980
981                 if (! $destsources{$bestlink}) {
982                         return $linktext unless length $config{cgiurl};
983                         return "<span class=\"createlink\"><a href=\"".
984                                 cgiurl(
985                                         do => "create",
986                                         page => lc($link),
987                                         from => $lpage
988                                 ).
989                                 "\" rel=\"nofollow\">?</a>$linktext</span>"
990                 }
991         }
992         
993         $bestlink=abs2rel($bestlink, dirname(htmlpage($page)));
994         $bestlink=beautify_urlpath($bestlink);
995         
996         if (! $opts{noimageinline} && isinlinableimage($bestlink)) {
997                 return "<img src=\"$bestlink\" alt=\"$linktext\" />";
998         }
999
1000         if (defined $opts{anchor}) {
1001                 $bestlink.="#".$opts{anchor};
1002         }
1003
1004         my @attrs;
1005         if (defined $opts{rel}) {
1006                 push @attrs, ' rel="'.$opts{rel}.'"';
1007         }
1008         if (defined $opts{class}) {
1009                 push @attrs, ' class="'.$opts{class}.'"';
1010         }
1011
1012         return "<a href=\"$bestlink\"@attrs>$linktext</a>";
1013 } #}}}
1014
1015 sub userlink ($) { #{{{
1016         my $user=shift;
1017
1018         my $oiduser=eval { openiduser($user) };
1019         if (defined $oiduser) {
1020                 return "<a href=\"$user\">$oiduser</a>";
1021         }
1022         else {
1023                 eval q{use CGI 'escapeHTML'};
1024                 error($@) if $@;
1025
1026                 return htmllink("", "", escapeHTML(
1027                         length $config{userdir} ? $config{userdir}."/".$user : $user
1028                 ), noimageinline => 1);
1029         }
1030 } #}}}
1031
1032 sub htmlize ($$$$) { #{{{
1033         my $page=shift;
1034         my $destpage=shift;
1035         my $type=shift;
1036         my $content=shift;
1037         
1038         my $oneline = $content !~ /\n/;
1039
1040         if (exists $hooks{htmlize}{$type}) {
1041                 $content=$hooks{htmlize}{$type}{call}->(
1042                         page => $page,
1043                         content => $content,
1044                 );
1045         }
1046         else {
1047                 error("htmlization of $type not supported");
1048         }
1049
1050         run_hooks(sanitize => sub {
1051                 $content=shift->(
1052                         page => $page,
1053                         destpage => $destpage,
1054                         content => $content,
1055                 );
1056         });
1057         
1058         if ($oneline) {
1059                 # hack to get rid of enclosing junk added by markdown
1060                 # and other htmlizers
1061                 $content=~s/^<p>//i;
1062                 $content=~s/<\/p>$//i;
1063                 chomp $content;
1064         }
1065
1066         return $content;
1067 } #}}}
1068
1069 sub linkify ($$$) { #{{{
1070         my $page=shift;
1071         my $destpage=shift;
1072         my $content=shift;
1073
1074         run_hooks(linkify => sub {
1075                 $content=shift->(
1076                         page => $page,
1077                         destpage => $destpage,
1078                         content => $content,
1079                 );
1080         });
1081         
1082         return $content;
1083 } #}}}
1084
1085 our %preprocessing;
1086 our $preprocess_preview=0;
1087 sub preprocess ($$$;$$) { #{{{
1088         my $page=shift; # the page the data comes from
1089         my $destpage=shift; # the page the data will appear in (different for inline)
1090         my $content=shift;
1091         my $scan=shift;
1092         my $preview=shift;
1093
1094         # Using local because it needs to be set within any nested calls
1095         # of this function.
1096         local $preprocess_preview=$preview if defined $preview;
1097
1098         my $handle=sub {
1099                 my $escape=shift;
1100                 my $prefix=shift;
1101                 my $command=shift;
1102                 my $params=shift;
1103                 $params="" if ! defined $params;
1104
1105                 if (length $escape) {
1106                         return "[[$prefix$command $params]]";
1107                 }
1108                 elsif (exists $hooks{preprocess}{$command}) {
1109                         return "" if $scan && ! $hooks{preprocess}{$command}{scan};
1110                         # Note: preserve order of params, some plugins may
1111                         # consider it significant.
1112                         my @params;
1113                         while ($params =~ m{
1114                                 (?:([-\w]+)=)?          # 1: named parameter key?
1115                                 (?:
1116                                         """(.*?)"""     # 2: triple-quoted value
1117                                 |
1118                                         "([^"]+)"       # 3: single-quoted value
1119                                 |
1120                                         (\S+)           # 4: unquoted value
1121                                 )
1122                                 (?:\s+|$)               # delimiter to next param
1123                         }sgx) {
1124                                 my $key=$1;
1125                                 my $val;
1126                                 if (defined $2) {
1127                                         $val=$2;
1128                                         $val=~s/\r\n/\n/mg;
1129                                         $val=~s/^\n+//g;
1130                                         $val=~s/\n+$//g;
1131                                 }
1132                                 elsif (defined $3) {
1133                                         $val=$3;
1134                                 }
1135                                 elsif (defined $4) {
1136                                         $val=$4;
1137                                 }
1138
1139                                 if (defined $key) {
1140                                         push @params, $key, $val;
1141                                 }
1142                                 else {
1143                                         push @params, $val, '';
1144                                 }
1145                         }
1146                         if ($preprocessing{$page}++ > 3) {
1147                                 # Avoid loops of preprocessed pages preprocessing
1148                                 # other pages that preprocess them, etc.
1149                                 return "[[!$command <span class=\"error\">".
1150                                         sprintf(gettext("preprocessing loop detected on %s at depth %i"),
1151                                                 $page, $preprocessing{$page}).
1152                                         "</span>]]";
1153                         }
1154                         my $ret;
1155                         if (! $scan) {
1156                                 $ret=eval {
1157                                         $hooks{preprocess}{$command}{call}->(
1158                                                 @params,
1159                                                 page => $page,
1160                                                 destpage => $destpage,
1161                                                 preview => $preprocess_preview,
1162                                         );
1163                                 };
1164                                 if ($@) {
1165                                         chomp $@;
1166                                         $ret="[[!$command <span class=\"error\">".
1167                                                 gettext("Error").": $@"."</span>]]";
1168                                 }
1169                         }
1170                         else {
1171                                 # use void context during scan pass
1172                                 eval {
1173                                         $hooks{preprocess}{$command}{call}->(
1174                                                 @params,
1175                                                 page => $page,
1176                                                 destpage => $destpage,
1177                                                 preview => $preprocess_preview,
1178                                         );
1179                                 };
1180                                 $ret="";
1181                         }
1182                         $preprocessing{$page}--;
1183                         return $ret;
1184                 }
1185                 else {
1186                         return "[[$prefix$command $params]]";
1187                 }
1188         };
1189         
1190         my $regex;
1191         if ($config{prefix_directives}) {
1192                 $regex = qr{
1193                         (\\?)           # 1: escape?
1194                         \[\[(!)         # directive open; 2: prefix
1195                         ([-\w]+)        # 3: command
1196                         (               # 4: the parameters..
1197                                 \s+     # Must have space if parameters present
1198                                 (?:
1199                                         (?:[-\w]+=)?            # named parameter key?
1200                                         (?:
1201                                                 """.*?"""       # triple-quoted value
1202                                                 |
1203                                                 "[^"]+"         # single-quoted value
1204                                                 |
1205                                                 [^\s\]]+        # unquoted value
1206                                         )
1207                                         \s*                     # whitespace or end
1208                                                                 # of directive
1209                                 )
1210                         *)?             # 0 or more parameters
1211                         \]\]            # directive closed
1212                 }sx;
1213         }
1214         else {
1215                 $regex = qr{
1216                         (\\?)           # 1: escape?
1217                         \[\[(!?)        # directive open; 2: optional prefix
1218                         ([-\w]+)        # 3: command
1219                         \s+
1220                         (               # 4: the parameters..
1221                                 (?:
1222                                         (?:[-\w]+=)?            # named parameter key?
1223                                         (?:
1224                                                 """.*?"""       # triple-quoted value
1225                                                 |
1226                                                 "[^"]+"         # single-quoted value
1227                                                 |
1228                                                 [^\s\]]+        # unquoted value
1229                                         )
1230                                         \s*                     # whitespace or end
1231                                                                 # of directive
1232                                 )
1233                         *)              # 0 or more parameters
1234                         \]\]            # directive closed
1235                 }sx;
1236         }
1237
1238         $content =~ s{$regex}{$handle->($1, $2, $3, $4)}eg;
1239         return $content;
1240 } #}}}
1241
1242 sub filter ($$$) { #{{{
1243         my $page=shift;
1244         my $destpage=shift;
1245         my $content=shift;
1246
1247         run_hooks(filter => sub {
1248                 $content=shift->(page => $page, destpage => $destpage, 
1249                         content => $content);
1250         });
1251
1252         return $content;
1253 } #}}}
1254
1255 sub indexlink () { #{{{
1256         return "<a href=\"$config{url}\">$config{wikiname}</a>";
1257 } #}}}
1258
1259 my $wikilock;
1260
1261 sub lockwiki (;$) { #{{{
1262         my $wait=@_ ? shift : 1;
1263         # Take an exclusive lock on the wiki to prevent multiple concurrent
1264         # run issues. The lock will be dropped on program exit.
1265         if (! -d $config{wikistatedir}) {
1266                 mkdir($config{wikistatedir});
1267         }
1268         open($wikilock, '>', "$config{wikistatedir}/lockfile") ||
1269                 error ("cannot write to $config{wikistatedir}/lockfile: $!");
1270         if (! flock($wikilock, 2 | 4)) { # LOCK_EX | LOCK_NB
1271                 if ($wait) {
1272                         debug("wiki seems to be locked, waiting for lock");
1273                         my $wait=600; # arbitrary, but don't hang forever to 
1274                                       # prevent process pileup
1275                         for (1..$wait) {
1276                                 return if flock($wikilock, 2 | 4);
1277                                 sleep 1;
1278                         }
1279                         error("wiki is locked; waited $wait seconds without lock being freed (possible stuck process or stale lock?)");
1280                 }
1281                 else {
1282                         return 0;
1283                 }
1284         }
1285         return 1;
1286 } #}}}
1287
1288 sub unlockwiki () { #{{{
1289         return close($wikilock) if $wikilock;
1290         return;
1291 } #}}}
1292
1293 my $commitlock;
1294
1295 sub commit_hook_enabled () { #{{{
1296         open($commitlock, '+>', "$config{wikistatedir}/commitlock") ||
1297                 error("cannot write to $config{wikistatedir}/commitlock: $!");
1298         if (! flock($commitlock, 1 | 4)) { # LOCK_SH | LOCK_NB to test
1299                 close($commitlock) || error("failed closing commitlock: $!");
1300                 return 0;
1301         }
1302         close($commitlock) || error("failed closing commitlock: $!");
1303         return 1;
1304 } #}}}
1305
1306 sub disable_commit_hook () { #{{{
1307         open($commitlock, '>', "$config{wikistatedir}/commitlock") ||
1308                 error("cannot write to $config{wikistatedir}/commitlock: $!");
1309         if (! flock($commitlock, 2)) { # LOCK_EX
1310                 error("failed to get commit lock");
1311         }
1312         return 1;
1313 } #}}}
1314
1315 sub enable_commit_hook () { #{{{
1316         return close($commitlock) if $commitlock;
1317         return;
1318 } #}}}
1319
1320 sub loadindex () { #{{{
1321         %oldrenderedfiles=%pagectime=();
1322         if (! $config{rebuild}) {
1323                 %pagesources=%pagemtime=%oldlinks=%links=%depends=
1324                 %destsources=%renderedfiles=%pagecase=%pagestate=();
1325         }
1326         my $in;
1327         if (! open ($in, "<", "$config{wikistatedir}/indexdb")) {
1328                 if (-e "$config{wikistatedir}/index") {
1329                         system("ikiwiki-transition", "indexdb", $config{srcdir});
1330                         open ($in, "<", "$config{wikistatedir}/indexdb") || return;
1331                 }
1332                 else {
1333                         return;
1334                 }
1335         }
1336
1337         my $index=Storable::fd_retrieve($in);
1338         if (! defined $index) {
1339                 return 0;
1340         }
1341
1342         my $pages;
1343         if (exists $index->{version} && ! ref $index->{version}) {
1344                 $pages=$index->{page};
1345                 %wikistate=%{$index->{state}};
1346         }
1347         else {
1348                 $pages=$index;
1349                 %wikistate=();
1350         }
1351
1352         foreach my $src (keys %$pages) {
1353                 my $d=$pages->{$src};
1354                 my $page=pagename($src);
1355                 $pagectime{$page}=$d->{ctime};
1356                 if (! $config{rebuild}) {
1357                         $pagesources{$page}=$src;
1358                         $pagemtime{$page}=$d->{mtime};
1359                         $renderedfiles{$page}=$d->{dest};
1360                         if (exists $d->{links} && ref $d->{links}) {
1361                                 $links{$page}=$d->{links};
1362                                 $oldlinks{$page}=[@{$d->{links}}];
1363                         }
1364                         if (exists $d->{depends}) {
1365                                 $depends{$page}=$d->{depends};
1366                         }
1367                         if (exists $d->{state}) {
1368                                 $pagestate{$page}=$d->{state};
1369                         }
1370                 }
1371                 $oldrenderedfiles{$page}=[@{$d->{dest}}];
1372         }
1373         foreach my $page (keys %pagesources) {
1374                 $pagecase{lc $page}=$page;
1375         }
1376         foreach my $page (keys %renderedfiles) {
1377                 $destsources{$_}=$page foreach @{$renderedfiles{$page}};
1378         }
1379         return close($in);
1380 } #}}}
1381
1382 sub saveindex () { #{{{
1383         run_hooks(savestate => sub { shift->() });
1384
1385         my %hookids;
1386         foreach my $type (keys %hooks) {
1387                 $hookids{$_}=1 foreach keys %{$hooks{$type}};
1388         }
1389         my @hookids=keys %hookids;
1390
1391         if (! -d $config{wikistatedir}) {
1392                 mkdir($config{wikistatedir});
1393         }
1394         my $newfile="$config{wikistatedir}/indexdb.new";
1395         my $cleanup = sub { unlink($newfile) };
1396         open (my $out, '>', $newfile) || error("cannot write to $newfile: $!", $cleanup);
1397
1398         my %index;
1399         foreach my $page (keys %pagemtime) {
1400                 next unless $pagemtime{$page};
1401                 my $src=$pagesources{$page};
1402
1403                 $index{page}{$src}={
1404                         ctime => $pagectime{$page},
1405                         mtime => $pagemtime{$page},
1406                         dest => $renderedfiles{$page},
1407                         links => $links{$page},
1408                 };
1409
1410                 if (exists $depends{$page}) {
1411                         $index{page}{$src}{depends} = $depends{$page};
1412                 }
1413
1414                 if (exists $pagestate{$page}) {
1415                         foreach my $id (@hookids) {
1416                                 foreach my $key (keys %{$pagestate{$page}{$id}}) {
1417                                         $index{page}{$src}{state}{$id}{$key}=$pagestate{$page}{$id}{$key};
1418                                 }
1419                         }
1420                 }
1421         }
1422
1423         $index{state}={};
1424         foreach my $id (@hookids) {
1425                 foreach my $key (keys %{$wikistate{$id}}) {
1426                         $index{state}{$id}{$key}=$wikistate{$id}{$key};
1427                 }
1428         }
1429         
1430         $index{version}="3";
1431         my $ret=Storable::nstore_fd(\%index, $out);
1432         return if ! defined $ret || ! $ret;
1433         close $out || error("failed saving to $newfile: $!", $cleanup);
1434         rename($newfile, "$config{wikistatedir}/indexdb") ||
1435                 error("failed renaming $newfile to $config{wikistatedir}/indexdb", $cleanup);
1436         
1437         return 1;
1438 } #}}}
1439
1440 sub template_file ($) { #{{{
1441         my $template=shift;
1442
1443         foreach my $dir ($config{templatedir}, "$installdir/share/ikiwiki/templates") {
1444                 return "$dir/$template" if -e "$dir/$template";
1445         }
1446         return;
1447 } #}}}
1448
1449 sub template_params (@) { #{{{
1450         my $filename=template_file(shift);
1451
1452         if (! defined $filename) {
1453                 return if wantarray;
1454                 return "";
1455         }
1456
1457         my @ret=(
1458                 filter => sub {
1459                         my $text_ref = shift;
1460                         ${$text_ref} = decode_utf8(${$text_ref});
1461                 },
1462                 filename => $filename,
1463                 loop_context_vars => 1,
1464                 die_on_bad_params => 0,
1465                 @_
1466         );
1467         return wantarray ? @ret : {@ret};
1468 } #}}}
1469
1470 sub template ($;@) { #{{{
1471         require HTML::Template;
1472         return HTML::Template->new(template_params(@_));
1473 } #}}}
1474
1475 sub misctemplate ($$;@) { #{{{
1476         my $title=shift;
1477         my $pagebody=shift;
1478         
1479         my $template=template("misc.tmpl");
1480         $template->param(
1481                 title => $title,
1482                 indexlink => indexlink(),
1483                 wikiname => $config{wikiname},
1484                 pagebody => $pagebody,
1485                 baseurl => baseurl(),
1486                 @_,
1487         );
1488         run_hooks(pagetemplate => sub {
1489                 shift->(page => "", destpage => "", template => $template);
1490         });
1491         return $template->output;
1492 }#}}}
1493
1494 sub hook (@) { # {{{
1495         my %param=@_;
1496         
1497         if (! exists $param{type} || ! ref $param{call} || ! exists $param{id}) {
1498                 error 'hook requires type, call, and id parameters';
1499         }
1500
1501         return if $param{no_override} && exists $hooks{$param{type}}{$param{id}};
1502         
1503         $hooks{$param{type}}{$param{id}}=\%param;
1504         return 1;
1505 } # }}}
1506
1507 sub run_hooks ($$) { # {{{
1508         # Calls the given sub for each hook of the given type,
1509         # passing it the hook function to call.
1510         my $type=shift;
1511         my $sub=shift;
1512
1513         if (exists $hooks{$type}) {
1514                 my @deferred;
1515                 foreach my $id (keys %{$hooks{$type}}) {
1516                         if ($hooks{$type}{$id}{last}) {
1517                                 push @deferred, $id;
1518                                 next;
1519                         }
1520                         $sub->($hooks{$type}{$id}{call});
1521                 }
1522                 foreach my $id (@deferred) {
1523                         $sub->($hooks{$type}{$id}{call});
1524                 }
1525         }
1526
1527         return 1;
1528 } #}}}
1529
1530 sub rcs_update () { #{{{
1531         $hooks{rcs}{rcs_update}{call}->(@_);
1532 } #}}}
1533
1534 sub rcs_prepedit ($) { #{{{
1535         $hooks{rcs}{rcs_prepedit}{call}->(@_);
1536 } #}}}
1537
1538 sub rcs_commit ($$$;$$) { #{{{
1539         $hooks{rcs}{rcs_commit}{call}->(@_);
1540 } #}}}
1541
1542 sub rcs_commit_staged ($$$) { #{{{
1543         $hooks{rcs}{rcs_commit_staged}{call}->(@_);
1544 } #}}}
1545
1546 sub rcs_add ($) { #{{{
1547         $hooks{rcs}{rcs_add}{call}->(@_);
1548 } #}}}
1549
1550 sub rcs_remove ($) { #{{{
1551         $hooks{rcs}{rcs_remove}{call}->(@_);
1552 } #}}}
1553
1554 sub rcs_rename ($$) { #{{{
1555         $hooks{rcs}{rcs_rename}{call}->(@_);
1556 } #}}}
1557
1558 sub rcs_recentchanges ($) { #{{{
1559         $hooks{rcs}{rcs_recentchanges}{call}->(@_);
1560 } #}}}
1561
1562 sub rcs_diff ($) { #{{{
1563         $hooks{rcs}{rcs_diff}{call}->(@_);
1564 } #}}}
1565
1566 sub rcs_getctime ($) { #{{{
1567         $hooks{rcs}{rcs_getctime}{call}->(@_);
1568 } #}}}
1569
1570 sub globlist_to_pagespec ($) { #{{{
1571         my @globlist=split(' ', shift);
1572
1573         my (@spec, @skip);
1574         foreach my $glob (@globlist) {
1575                 if ($glob=~/^!(.*)/) {
1576                         push @skip, $glob;
1577                 }
1578                 else {
1579                         push @spec, $glob;
1580                 }
1581         }
1582
1583         my $spec=join(' or ', @spec);
1584         if (@skip) {
1585                 my $skip=join(' and ', @skip);
1586                 if (length $spec) {
1587                         $spec="$skip and ($spec)";
1588                 }
1589                 else {
1590                         $spec=$skip;
1591                 }
1592         }
1593         return $spec;
1594 } #}}}
1595
1596 sub is_globlist ($) { #{{{
1597         my $s=shift;
1598         return ( $s =~ /[^\s]+\s+([^\s]+)/ && $1 ne "and" && $1 ne "or" );
1599 } #}}}
1600
1601 sub safequote ($) { #{{{
1602         my $s=shift;
1603         $s=~s/[{}]//g;
1604         return "q{$s}";
1605 } #}}}
1606
1607 sub add_depends ($$) { #{{{
1608         my $page=shift;
1609         my $pagespec=shift;
1610         
1611         return unless pagespec_valid($pagespec);
1612
1613         if (! exists $depends{$page}) {
1614                 $depends{$page}=$pagespec;
1615         }
1616         else {
1617                 $depends{$page}=pagespec_merge($depends{$page}, $pagespec);
1618         }
1619
1620         return 1;
1621 } # }}}
1622
1623 sub file_pruned ($$) { #{{{
1624         require File::Spec;
1625         my $file=File::Spec->canonpath(shift);
1626         my $base=File::Spec->canonpath(shift);
1627         $file =~ s#^\Q$base\E/+##;
1628
1629         my $regexp='('.join('|', @{$config{wiki_file_prune_regexps}}).')';
1630         return $file =~ m/$regexp/ && $file ne $base;
1631 } #}}}
1632
1633 sub gettext { #{{{
1634         # Only use gettext in the rare cases it's needed.
1635         if ((exists $ENV{LANG} && length $ENV{LANG}) ||
1636             (exists $ENV{LC_ALL} && length $ENV{LC_ALL}) ||
1637             (exists $ENV{LC_MESSAGES} && length $ENV{LC_MESSAGES})) {
1638                 if (! $gettext_obj) {
1639                         $gettext_obj=eval q{
1640                                 use Locale::gettext q{textdomain};
1641                                 Locale::gettext->domain('ikiwiki')
1642                         };
1643                         if ($@) {
1644                                 print STDERR "$@";
1645                                 $gettext_obj=undef;
1646                                 return shift;
1647                         }
1648                 }
1649                 return $gettext_obj->get(shift);
1650         }
1651         else {
1652                 return shift;
1653         }
1654 } #}}}
1655
1656 sub yesno ($) { #{{{
1657         my $val=shift;
1658
1659         return (defined $val && lc($val) eq gettext("yes"));
1660 } #}}}
1661
1662 sub pagespec_merge ($$) { #{{{
1663         my $a=shift;
1664         my $b=shift;
1665
1666         return $a if $a eq $b;
1667
1668         # Support for old-style GlobLists.
1669         if (is_globlist($a)) {
1670                 $a=globlist_to_pagespec($a);
1671         }
1672         if (is_globlist($b)) {
1673                 $b=globlist_to_pagespec($b);
1674         }
1675
1676         return "($a) or ($b)";
1677 } #}}}
1678
1679 sub pagespec_translate ($) { #{{{
1680         my $spec=shift;
1681
1682         # Support for old-style GlobLists.
1683         if (is_globlist($spec)) {
1684                 $spec=globlist_to_pagespec($spec);
1685         }
1686
1687         # Convert spec to perl code.
1688         my $code="";
1689         while ($spec=~m{
1690                 \s*             # ignore whitespace
1691                 (               # 1: match a single word
1692                         \!              # !
1693                 |
1694                         \(              # (
1695                 |
1696                         \)              # )
1697                 |
1698                         \w+\([^\)]*\)   # command(params)
1699                 |
1700                         [^\s()]+        # any other text
1701                 )
1702                 \s*             # ignore whitespace
1703         }igx) {
1704                 my $word=$1;
1705                 if (lc $word eq 'and') {
1706                         $code.=' &&';
1707                 }
1708                 elsif (lc $word eq 'or') {
1709                         $code.=' ||';
1710                 }
1711                 elsif ($word eq "(" || $word eq ")" || $word eq "!") {
1712                         $code.=' '.$word;
1713                 }
1714                 elsif ($word =~ /^(\w+)\((.*)\)$/) {
1715                         if (exists $IkiWiki::PageSpec::{"match_$1"}) {
1716                                 $code.="IkiWiki::PageSpec::match_$1(\$page, ".safequote($2).", \@_)";
1717                         }
1718                         else {
1719                                 $code.=' 0';
1720                         }
1721                 }
1722                 else {
1723                         $code.=" IkiWiki::PageSpec::match_glob(\$page, ".safequote($word).", \@_)";
1724                 }
1725         }
1726
1727         if (! length $code) {
1728                 $code=0;
1729         }
1730
1731         no warnings;
1732         return eval 'sub { my $page=shift; '.$code.' }';
1733 } #}}}
1734
1735 sub pagespec_match ($$;@) { #{{{
1736         my $page=shift;
1737         my $spec=shift;
1738         my @params=@_;
1739
1740         # Backwards compatability with old calling convention.
1741         if (@params == 1) {
1742                 unshift @params, 'location';
1743         }
1744
1745         my $sub=pagespec_translate($spec);
1746         return IkiWiki::FailReason->new("syntax error in pagespec \"$spec\"") if $@;
1747         return $sub->($page, @params);
1748 } #}}}
1749
1750 sub pagespec_valid ($) { #{{{
1751         my $spec=shift;
1752
1753         my $sub=pagespec_translate($spec);
1754         return ! $@;
1755 } #}}}
1756         
1757 sub glob2re ($) { #{{{
1758         my $re=quotemeta(shift);
1759         $re=~s/\\\*/.*/g;
1760         $re=~s/\\\?/./g;
1761         return $re;
1762 } #}}}
1763
1764 package IkiWiki::FailReason;
1765
1766 use overload ( #{{{
1767         '""'    => sub { ${$_[0]} },
1768         '0+'    => sub { 0 },
1769         '!'     => sub { bless $_[0], 'IkiWiki::SuccessReason'},
1770         fallback => 1,
1771 ); #}}}
1772
1773 sub new { #{{{
1774         my $class = shift;
1775         my $value = shift;
1776         return bless \$value, $class;
1777 } #}}}
1778
1779 package IkiWiki::SuccessReason;
1780
1781 use overload ( #{{{
1782         '""'    => sub { ${$_[0]} },
1783         '0+'    => sub { 1 },
1784         '!'     => sub { bless $_[0], 'IkiWiki::FailReason'},
1785         fallback => 1,
1786 ); #}}}
1787
1788 sub new { #{{{
1789         my $class = shift;
1790         my $value = shift;
1791         return bless \$value, $class;
1792 }; #}}}
1793
1794 package IkiWiki::PageSpec;
1795
1796 sub match_glob ($$;@) { #{{{
1797         my $page=shift;
1798         my $glob=shift;
1799         my %params=@_;
1800         
1801         my $from=exists $params{location} ? $params{location} : '';
1802         
1803         # relative matching
1804         if ($glob =~ m!^\./!) {
1805                 $from=~s#/?[^/]+$##;
1806                 $glob=~s#^\./##;
1807                 $glob="$from/$glob" if length $from;
1808         }
1809
1810         my $regexp=IkiWiki::glob2re($glob);
1811         if ($page=~/^$regexp$/i) {
1812                 if (! IkiWiki::isinternal($page) || $params{internal}) {
1813                         return IkiWiki::SuccessReason->new("$glob matches $page");
1814                 }
1815                 else {
1816                         return IkiWiki::FailReason->new("$glob matches $page, but the page is an internal page");
1817                 }
1818         }
1819         else {
1820                 return IkiWiki::FailReason->new("$glob does not match $page");
1821         }
1822 } #}}}
1823
1824 sub match_internal ($$;@) { #{{{
1825         return match_glob($_[0], $_[1], @_, internal => 1)
1826 } #}}}
1827
1828 sub match_link ($$;@) { #{{{
1829         my $page=shift;
1830         my $link=lc(shift);
1831         my %params=@_;
1832
1833         my $from=exists $params{location} ? $params{location} : '';
1834
1835         # relative matching
1836         if ($link =~ m!^\.! && defined $from) {
1837                 $from=~s#/?[^/]+$##;
1838                 $link=~s#^\./##;
1839                 $link="$from/$link" if length $from;
1840         }
1841
1842         my $links = $IkiWiki::links{$page};
1843         return IkiWiki::FailReason->new("$page has no links") unless $links && @{$links};
1844         my $bestlink = IkiWiki::bestlink($from, $link);
1845         foreach my $p (@{$links}) {
1846                 if (length $bestlink) {
1847                         return IkiWiki::SuccessReason->new("$page links to $link")
1848                                 if $bestlink eq IkiWiki::bestlink($page, $p);
1849                 }
1850                 else {
1851                         return IkiWiki::SuccessReason->new("$page links to page $p matching $link")
1852                                 if match_glob($p, $link, %params);
1853                 }
1854         }
1855         return IkiWiki::FailReason->new("$page does not link to $link");
1856 } #}}}
1857
1858 sub match_backlink ($$;@) { #{{{
1859         return match_link($_[1], $_[0], @_);
1860 } #}}}
1861
1862 sub match_created_before ($$;@) { #{{{
1863         my $page=shift;
1864         my $testpage=shift;
1865
1866         if (exists $IkiWiki::pagectime{$testpage}) {
1867                 if ($IkiWiki::pagectime{$page} < $IkiWiki::pagectime{$testpage}) {
1868                         return IkiWiki::SuccessReason->new("$page created before $testpage");
1869                 }
1870                 else {
1871                         return IkiWiki::FailReason->new("$page not created before $testpage");
1872                 }
1873         }
1874         else {
1875                 return IkiWiki::FailReason->new("$testpage has no ctime");
1876         }
1877 } #}}}
1878
1879 sub match_created_after ($$;@) { #{{{
1880         my $page=shift;
1881         my $testpage=shift;
1882
1883         if (exists $IkiWiki::pagectime{$testpage}) {
1884                 if ($IkiWiki::pagectime{$page} > $IkiWiki::pagectime{$testpage}) {
1885                         return IkiWiki::SuccessReason->new("$page created after $testpage");
1886                 }
1887                 else {
1888                         return IkiWiki::FailReason->new("$page not created after $testpage");
1889                 }
1890         }
1891         else {
1892                 return IkiWiki::FailReason->new("$testpage has no ctime");
1893         }
1894 } #}}}
1895
1896 sub match_creation_day ($$;@) { #{{{
1897         if ((gmtime($IkiWiki::pagectime{shift()}))[3] == shift) {
1898                 return IkiWiki::SuccessReason->new('creation_day matched');
1899         }
1900         else {
1901                 return IkiWiki::FailReason->new('creation_day did not match');
1902         }
1903 } #}}}
1904
1905 sub match_creation_month ($$;@) { #{{{
1906         if ((gmtime($IkiWiki::pagectime{shift()}))[4] + 1 == shift) {
1907                 return IkiWiki::SuccessReason->new('creation_month matched');
1908         }
1909         else {
1910                 return IkiWiki::FailReason->new('creation_month did not match');
1911         }
1912 } #}}}
1913
1914 sub match_creation_year ($$;@) { #{{{
1915         if ((gmtime($IkiWiki::pagectime{shift()}))[5] + 1900 == shift) {
1916                 return IkiWiki::SuccessReason->new('creation_year matched');
1917         }
1918         else {
1919                 return IkiWiki::FailReason->new('creation_year did not match');
1920         }
1921 } #}}}
1922
1923 sub match_user ($$;@) { #{{{
1924         shift;
1925         my $user=shift;
1926         my %params=@_;
1927         
1928         if (! exists $params{user}) {
1929                 return IkiWiki::FailReason->new("no user specified");
1930         }
1931
1932         if (defined $params{user} && lc $params{user} eq lc $user) {
1933                 return IkiWiki::SuccessReason->new("user is $user");
1934         }
1935         elsif (! defined $params{user}) {
1936                 return IkiWiki::FailReason->new("not logged in");
1937         }
1938         else {
1939                 return IkiWiki::FailReason->new("user is $params{user}, not $user");
1940         }
1941 } #}}}
1942
1943 sub match_admin ($$;@) { #{{{
1944         shift;
1945         shift;
1946         my %params=@_;
1947         
1948         if (! exists $params{user}) {
1949                 return IkiWiki::FailReason->new("no user specified");
1950         }
1951
1952         if (defined $params{user} && IkiWiki::is_admin($params{user})) {
1953                 return IkiWiki::SuccessReason->new("user is an admin");
1954         }
1955         elsif (! defined $params{user}) {
1956                 return IkiWiki::FailReason->new("not logged in");
1957         }
1958         else {
1959                 return IkiWiki::FailReason->new("user is not an admin");
1960         }
1961 } #}}}
1962
1963 sub match_ip ($$;@) { #{{{
1964         shift;
1965         my $ip=shift;
1966         my %params=@_;
1967         
1968         if (! exists $params{ip}) {
1969                 return IkiWiki::FailReason->new("no IP specified");
1970         }
1971
1972         if (defined $params{ip} && lc $params{ip} eq lc $ip) {
1973                 return IkiWiki::SuccessReason->new("IP is $ip");
1974         }
1975         else {
1976                 return IkiWiki::FailReason->new("IP is $params{ip}, not $ip");
1977         }
1978 } #}}}
1979
1980 1