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