]> git.vanrenterghem.biz Git - git.ikiwiki.info.git/blobdiff - IkiWiki.pm
Merge branch 'master' of git://git.ikiwiki.info into bugs
[git.ikiwiki.info.git] / IkiWiki.pm
index 085953a17220fa50b44bf42892d7f0683f524d21..f1a5f8058ec551667027e1af755848f7c11655aa 100644 (file)
@@ -1,35 +1,62 @@
 #!/usr/bin/perl
 
 package IkiWiki;
+
 use warnings;
 use strict;
 use Encode;
+use HTML::Entities;
+use URI::Escape q{uri_escape_utf8};
+use POSIX;
+use Storable;
 use open qw{:utf8 :std};
 
+use vars qw{%config %links %oldlinks %pagemtime %pagectime %pagecase
+           %pagestate %renderedfiles %oldrenderedfiles %pagesources
+           %destsources %depends %hooks %forcerebuild $gettext_obj};
+
+use Exporter q{import};
+our @EXPORT = qw(hook debug error template htmlpage add_depends pagespec_match
+                 bestlink htmllink readfile writefile pagetype srcfile pagename
+                 displaytime will_render gettext urlto targetpage
+                add_underlay
+                 %config %links %pagestate %renderedfiles
+                 %pagesources %destsources);
+our $VERSION = 2.00; # plugin interface version, next is ikiwiki version
+our $version='unknown'; # VERSION_AUTOREPLACE done by Makefile, DNE
+my $installdir=''; # INSTALLDIR_AUTOREPLACE done by Makefile, DNE
+
 # Optimisation.
 use Memoize;
 memoize("abs2rel");
-
-use vars qw{%config %links %oldlinks %oldpagemtime %pagectime
-            %renderedfiles %pagesources %depends %hooks};
+memoize("pagespec_translate");
+memoize("file_pruned");
 
 sub defaultconfig () { #{{{
-       wiki_file_prune_regexp => qr{((^|/).svn/|\.\.|^\.|\/\.|\.html?$|\.rss$)},
-       wiki_link_regexp => qr/\[\[(?:([^\]\|]+)\|)?([^\s\]]+)\]\]/,
-       wiki_processor_regexp => qr/\[\[(\w+)\s+([^\]]*)\]\]/,
+       return
+       wiki_file_prune_regexps => [qr/(^|\/)\.\.(\/|$)/, qr/^\./, qr/\/\./,
+               qr/\.x?html?$/, qr/\.ikiwiki-new$/,
+               qr/(^|\/).svn\//, qr/.arch-ids\//, qr/{arch}\//,
+               qr/(^|\/)_MTN\//,
+               qr/\.dpkg-tmp$/],
        wiki_file_regexp => qr/(^[-[:alnum:]_.:\/+]+$)/,
+       web_commit_regexp => qr/^web commit (by (.*?(?=: |$))|from (\d+\.\d+\.\d+\.\d+)):?(.*)/,
        verbose => 0,
+       syslog => 0,
        wikiname => "wiki",
        default_pageext => "mdwn",
+       htmlext => "html",
        cgi => 0,
-       rcs => 'svn',
-       notify => 0,
+       post_commit => 0,
+       rcs => '',
        url => '',
        cgiurl => '',
        historyurl => '',
        diffurl => '',
-       anonok => 0,
        rss => 0,
+       atom => 0,
+       allowrss => 0,
+       allowatom => 0,
        discussion => 1,
        rebuild => 0,
        refresh => 0,
@@ -37,21 +64,34 @@ sub defaultconfig () { #{{{
        w3mmode => 0,
        wrapper => undef,
        wrappermode => undef,
-       svnrepo => undef,
        svnpath => "trunk",
+       gitorigin_branch => "origin",
+       gitmaster_branch => "master",
        srcdir => undef,
        destdir => undef,
        pingurl => [],
-       templatedir => "/usr/share/ikiwiki/templates",
-       underlaydir => "/usr/share/ikiwiki/basewiki",
+       templatedir => "$installdir/share/ikiwiki/templates",
+       underlaydir => "$installdir/share/ikiwiki/basewiki",
+       underlaydirs => [],
        setup => undef,
        adminuser => undef,
        adminemail => undef,
-       plugin => [qw{mdwn inline htmlscrubber}],
+       plugin => [qw{mdwn link inline htmlscrubber passwordauth openid
+                       signinedit lockedit conditional recentchanges}],
+       libdir => undef,
        timeformat => '%c',
        locale => undef,
+       sslcookie => 0,
+       httpauth => 0,
+       userdir => "",
+       usedirs => 1,
+       numbacklinks => 10,
+       account_creation_password => "",
+       prefix_directives => 0,
+       hardlink => 0,
+       cgi_disable_uploads => 1,
 } #}}}
-   
+
 sub checkconfig () { #{{{
        # locale stuff; avoid LC_ALL since it overrides everything
        if (defined $ENV{LC_ALL}) {
@@ -59,13 +99,21 @@ sub checkconfig () { #{{{
                delete $ENV{LC_ALL};
        }
        if (defined $config{locale}) {
-               eval q{use POSIX};
-               $ENV{LANG} = $config{locale}
-                       if POSIX::setlocale(&POSIX::LANG, $config{locale});
+               if (POSIX::setlocale(&POSIX::LC_ALL, $config{locale})) {
+                       $ENV{LANG}=$config{locale};
+                       $gettext_obj=undef;
+               }
+       }
+
+       if (ref $config{ENV} eq 'HASH') {
+               foreach my $val (keys %{$config{ENV}}) {
+                       $ENV{$val}=$config{ENV}{$val};
+               }
        }
 
        if ($config{w3mmode}) {
                eval q{use Cwd q{abs_path}};
+               error($@) if $@;
                $config{srcdir}=possibly_foolish_untaint(abs_path($config{srcdir}));
                $config{destdir}=possibly_foolish_untaint(abs_path($config{destdir}));
                $config{cgiurl}="file:///\$LIB/ikiwiki-w3m.cgi/".$config{cgiurl}
@@ -74,17 +122,14 @@ sub checkconfig () { #{{{
        }
 
        if ($config{cgi} && ! length $config{url}) {
-               error("Must specify url to wiki with --url when using --cgi\n");
-       }
-       if ($config{rss} && ! length $config{url}) {
-               error("Must specify url to wiki with --url when using --rss\n");
+               error(gettext("Must specify url to wiki with --url when using --cgi"));
        }
        
        $config{wikistatedir}="$config{srcdir}/.ikiwiki"
                unless exists $config{wikistatedir};
        
        if ($config{rcs}) {
-               eval qq{require IkiWiki::Rcs::$config{rcs}};
+               eval qq{use IkiWiki::Rcs::$config{rcs}};
                if ($@) {
                        error("Failed to load RCS module IkiWiki::Rcs::$config{rcs}: $@");
                }
@@ -93,44 +138,100 @@ sub checkconfig () { #{{{
                require IkiWiki::Rcs::Stub;
        }
 
-       if (exists $hooks{checkconfig}) {
-                foreach my $id (keys %{$hooks{checkconfig}}) {
-                        $hooks{checkconfig}{$id}{call}->();
-                }
-        }
+       if (exists $config{umask}) {
+               umask(possibly_foolish_untaint($config{umask}));
+       }
+
+       run_hooks(checkconfig => sub { shift->() });
+
+       return 1;
 } #}}}
 
 sub loadplugins () { #{{{
-       foreach my $plugin (@{$config{plugin}}) {
-               my $mod="IkiWiki::Plugin::".possibly_foolish_untaint($plugin);
-               eval qq{use $mod};
-               if ($@) {
-                       error("Failed to load plugin $mod: $@");
+       if (defined $config{libdir}) {
+               unshift @INC, possibly_foolish_untaint($config{libdir});
+       }
+
+       loadplugin($_) foreach @{$config{plugin}};
+
+       run_hooks(getopt => sub { shift->() });
+       if (grep /^-/, @ARGV) {
+               print STDERR "Unknown option: $_\n"
+                       foreach grep /^-/, @ARGV;
+               usage();
+       }
+
+       return 1;
+} #}}}
+
+sub loadplugin ($) { #{{{
+       my $plugin=shift;
+
+       return if grep { $_ eq $plugin} @{$config{disable_plugins}};
+
+       foreach my $dir (defined $config{libdir} ? possibly_foolish_untaint($config{libdir}) : undef,
+                        "$installdir/lib/ikiwiki") {
+               if (defined $dir && -x "$dir/plugins/$plugin") {
+                       require IkiWiki::Plugin::external;
+                       import IkiWiki::Plugin::external "$dir/plugins/$plugin";
+                       return 1;
                }
        }
+
+       my $mod="IkiWiki::Plugin::".possibly_foolish_untaint($plugin);
+       eval qq{use $mod};
+       if ($@) {
+               error("Failed to load plugin $mod: $@");
+       }
+       return 1;
 } #}}}
 
-sub error ($) { #{{{
+sub error ($;$) { #{{{
+       my $message=shift;
+       my $cleaner=shift;
        if ($config{cgi}) {
                print "Content-type: text/html\n\n";
-               print misctemplate("Error", "<p>Error: @_</p>");
+               print misctemplate(gettext("Error"),
+                       "<p>".gettext("Error").": $message</p>");
+       }
+       log_message('err' => $message) if $config{syslog};
+       if (defined $cleaner) {
+               $cleaner->();
        }
-       die @_;
+       die $message."\n";
 } #}}}
 
 sub debug ($) { #{{{
        return unless $config{verbose};
-       if (! $config{cgi}) {
-               print "@_\n";
+       return log_message(debug => @_);
+} #}}}
+
+my $log_open=0;
+sub log_message ($$) { #{{{
+       my $type=shift;
+
+       if ($config{syslog}) {
+               require Sys::Syslog;
+               if (! $log_open) {
+                       Sys::Syslog::setlogsock('unix');
+                       Sys::Syslog::openlog('ikiwiki', '', 'user');
+                       $log_open=1;
+               }
+               return eval {
+                       Sys::Syslog::syslog($type, "[$config{wikiname}] %s", join(" ", @_));
+               };
+       }
+       elsif (! $config{cgi}) {
+               return print "@_\n";
        }
        else {
-               print STDERR "@_\n";
+               return print STDERR "@_\n";
        }
 } #}}}
 
 sub possibly_foolish_untaint ($) { #{{{
        my $tainted=shift;
-       my ($untainted)=$tainted=~/(.*)/;
+       my ($untainted)=$tainted=~/(.*)/s;
        return $untainted;
 } #}}}
 
@@ -154,7 +255,13 @@ sub pagetype ($) { #{{{
        if ($page =~ /\.([^.]+)$/) {
                return $1 if exists $hooks{htmlize}{$1};
        }
-       return undef;
+       return;
+} #}}}
+
+sub isinternal ($) { #{{{
+       my $page=shift;
+       return exists $pagesources{$page} &&
+               $pagesources{$page} =~ /\._([^.]+)$/;
 } #}}}
 
 sub pagename ($) { #{{{
@@ -166,41 +273,73 @@ sub pagename ($) { #{{{
        return $page;
 } #}}}
 
-sub htmlpage ($) { #{{{
+sub targetpage ($$) { #{{{
        my $page=shift;
+       my $ext=shift;
+       
+       if (! $config{usedirs} || $page =~ /^index$/ ) {
+               return $page.".".$ext;
+       } else {
+               return $page."/index.".$ext;
+       }
+} #}}}
 
-       return $page.".html";
+sub htmlpage ($) { #{{{
+       my $page=shift;
+       
+       return targetpage($page, $config{htmlext});
 } #}}}
 
-sub srcfile ($) { #{{{
+sub srcfile_stat { #{{{
        my $file=shift;
+       my $nothrow=shift;
 
-       return "$config{srcdir}/$file" if -e "$config{srcdir}/$file";
-       return "$config{underlaydir}/$file" if -e "$config{underlaydir}/$file";
-       error("internal error: $file cannot be found");
+       return "$config{srcdir}/$file", stat(_) if -e "$config{srcdir}/$file";
+       foreach my $dir (@{$config{underlaydirs}}, $config{underlaydir}) {
+               return "$dir/$file", stat(_) if -e "$dir/$file";
+       }
+       error("internal error: $file cannot be found in $config{srcdir} or underlay") unless $nothrow;
+       return;
+} #}}}
+
+sub srcfile ($;$) { #{{{
+       return (srcfile_stat(@_))[0];
 } #}}}
 
-sub readfile ($;$) { #{{{
+sub add_underlay ($) { #{{{
+       my $dir=shift;
+
+       if ($dir=~/^\//) {
+               unshift @{$config{underlaydirs}}, $dir;
+       }
+       else {
+               unshift @{$config{underlaydirs}}, "$config{underlaydir}/../$dir";
+       }
+
+       return 1;
+} #}}}
+
+sub readfile ($;$$) { #{{{
        my $file=shift;
        my $binary=shift;
+       my $wantfd=shift;
 
        if (-l $file) {
                error("cannot read a symlink ($file)");
        }
        
        local $/=undef;
-       open (IN, $file) || error("failed to read $file: $!");
-       binmode(IN) if ($binary);
-       my $ret=<IN>;
-       close IN;
+       open (my $in, "<", $file) || error("failed to read $file: $!");
+       binmode($in) if ($binary);
+       return \*$in if $wantfd;
+       my $ret=<$in>;
+       close $in || error("failed to read $file: $!");
        return $ret;
 } #}}}
 
-sub writefile ($$$;$) { #{{{
-       my $file=shift; # can include subdirs
-       my $destdir=shift; # directory to put file in
-       my $content=shift;
-       my $binary=shift;
+sub prep_writefile ($$) { #{{{
+       my $file=shift;
+       my $destdir=shift;
        
        my $test=$file;
        while (length $test) {
@@ -220,34 +359,101 @@ sub writefile ($$$;$) { #{{{
                        }
                }
        }
+
+       return 1;
+} #}}}
+
+sub writefile ($$$;$$) { #{{{
+       my $file=shift; # can include subdirs
+       my $destdir=shift; # directory to put file in
+       my $content=shift;
+       my $binary=shift;
+       my $writer=shift;
+       
+       prep_writefile($file, $destdir);
+       
+       my $newfile="$destdir/$file.ikiwiki-new";
+       if (-l $newfile) {
+               error("cannot write to a symlink ($newfile)");
+       }
        
-       open (OUT, ">$destdir/$file") || error("failed to write $destdir/$file: $!");
-       binmode(OUT) if ($binary);
-       print OUT $content;
-       close OUT;
+       my $cleanup = sub { unlink($newfile) };
+       open (my $out, '>', $newfile) || error("failed to write $newfile: $!", $cleanup);
+       binmode($out) if ($binary);
+       if ($writer) {
+               $writer->(\*$out, $cleanup);
+       }
+       else {
+               print $out $content or error("failed writing to $newfile: $!", $cleanup);
+       }
+       close $out || error("failed saving $newfile: $!", $cleanup);
+       rename($newfile, "$destdir/$file") || 
+               error("failed renaming $newfile to $destdir/$file: $!", $cleanup);
+
+       return 1;
+} #}}}
+
+my %cleared;
+sub will_render ($$;$) { #{{{
+       my $page=shift;
+       my $dest=shift;
+       my $clear=shift;
+
+       # Important security check.
+       if (-e "$config{destdir}/$dest" && ! $config{rebuild} &&
+           ! grep { $_ eq $dest } (@{$renderedfiles{$page}}, @{$oldrenderedfiles{$page}})) {
+               error("$config{destdir}/$dest independently created, not overwriting with version from $page");
+       }
+
+       if (! $clear || $cleared{$page}) {
+               $renderedfiles{$page}=[$dest, grep { $_ ne $dest } @{$renderedfiles{$page}}];
+       }
+       else {
+               foreach my $old (@{$renderedfiles{$page}}) {
+                       delete $destsources{$old};
+               }
+               $renderedfiles{$page}=[$dest];
+               $cleared{$page}=1;
+       }
+       $destsources{$dest}=$page;
+
+       return 1;
 } #}}}
 
 sub bestlink ($$) { #{{{
-       # Given a page and the text of a link on the page, determine which
-       # existing page that link best points to. Prefers pages under a
-       # subdirectory with the same name as the source page, failing that
-       # goes down the directory tree to the base looking for matching
-       # pages.
        my $page=shift;
-       my $link=lc(shift);
+       my $link=shift;
        
        my $cwd=$page;
+       if ($link=~s/^\/+//) {
+               # absolute links
+               $cwd="";
+       }
+       $link=~s/\/$//;
+
        do {
                my $l=$cwd;
                $l.="/" if length $l;
                $l.=$link;
 
                if (exists $links{$l}) {
-                       #debug("for $page, \"$link\", use $l");
                        return $l;
                }
+               elsif (exists $pagecase{lc $l}) {
+                       return $pagecase{lc $l};
+               }
        } while $cwd=~s!/?[^/]+$!!;
 
+       if (length $config{userdir}) {
+               my $l = "$config{userdir}/".lc($link);
+               if (exists $links{$l}) {
+                       return $l;
+               }
+               elsif (exists $pagecase{lc $l}) {
+                       return $pagecase{lc $l};
+               }
+       }
+
        #print STDERR "warning: page $page, broken link: $link\n";
        return "";
 } #}}}
@@ -255,43 +461,57 @@ sub bestlink ($$) { #{{{
 sub isinlinableimage ($) { #{{{
        my $file=shift;
        
-       $file=~/\.(png|gif|jpg|jpeg)$/i;
+       return $file =~ /\.(png|gif|jpg|jpeg)$/i;
 } #}}}
 
-sub pagetitle ($) { #{{{
+sub pagetitle ($;$) { #{{{
        my $page=shift;
-       $page=~s/__(\d+)__/&#$1;/g;
-       $page=~y/_/ /;
+       my $unescaped=shift;
+
+       if ($unescaped) {
+               $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : chr($2)/eg;
+       }
+       else {
+               $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : "&#$2;"/eg;
+       }
+
        return $page;
 } #}}}
 
 sub titlepage ($) { #{{{
        my $title=shift;
-       $title=~y/ /_/;
-       $title=~s/([^-[:alnum:]_:+\/.])/"__".ord($1)."__"/eg;
+       $title=~s/([^-[:alnum:]:+\/.])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
        return $title;
 } #}}}
 
+sub linkpage ($) { #{{{
+       my $link=shift;
+       $link=~s/([^-[:alnum:]:+\/._])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
+       return $link;
+} #}}}
+
 sub cgiurl (@) { #{{{
        my %params=@_;
 
-       return $config{cgiurl}."?".join("&amp;", map "$_=$params{$_}", keys %params);
+       return $config{cgiurl}."?".
+               join("&amp;", map $_."=".uri_escape_utf8($params{$_}), keys %params);
 } #}}}
 
-sub styleurl (;$) { #{{{
+sub baseurl (;$) { #{{{
        my $page=shift;
 
-       return "$config{url}/style.css" if ! defined $page;
+       return "$config{url}/" if ! defined $page;
        
+       $page=htmlpage($page);
        $page=~s/[^\/]+$//;
        $page=~s/[^\/]+\//..\//g;
-       return $page."style.css";
+       return $page;
 } #}}}
 
-sub abs2rel ($$) {
+sub abs2rel ($$) { #{{{
        # Work around very innefficient behavior in File::Spec if abs2rel
        # is passed two relative paths. It's much faster if paths are
-       # absolute!
+       # absolute! (Debian bug #376658; fixed in debian unstable now)
        my $path="/".shift;
        my $base="/".shift;
 
@@ -299,142 +519,549 @@ sub abs2rel ($$) {
        my $ret=File::Spec->abs2rel($path, $base);
        $ret=~s/^// if defined $ret;
        return $ret;
-}
+} #}}}
 
-sub htmllink ($$$;$$$) { #{{{
+sub displaytime ($;$) { #{{{
+       my $time=shift;
+       my $format=shift;
+       if (! defined $format) {
+               $format=$config{timeformat};
+       }
+
+       # strftime doesn't know about encodings, so make sure
+       # its output is properly treated as utf8
+       return decode_utf8(POSIX::strftime($format, localtime($time)));
+} #}}}
+
+sub beautify_urlpath ($) { #{{{
+       my $url=shift;
+
+       if ($config{usedirs}) {
+               $url =~ s!/index.$config{htmlext}$!/!;
+       }
+
+       # Ensure url is not an empty link, and
+       # if it's relative, make that explicit to avoid colon confusion.
+       if ($url !~ /\//) {
+               $url="./$url";
+       }
+
+       return $url;
+} #}}}
+
+sub urlto ($$) { #{{{
+       my $to=shift;
+       my $from=shift;
+
+       if (! length $to) {
+               return beautify_urlpath(baseurl($from)."index.$config{htmlext}");
+       }
+
+       if (! $destsources{$to}) {
+               $to=htmlpage($to);
+       }
+
+       my $link = abs2rel($to, dirname(htmlpage($from)));
+
+       return beautify_urlpath($link);
+} #}}}
+
+sub htmllink ($$$;@) { #{{{
        my $lpage=shift; # the page doing the linking
        my $page=shift; # the page that will contain the link (different for inline)
        my $link=shift;
-       my $noimageinline=shift; # don't turn links into inline html images
-       my $forcesubpage=shift; # force a link to a subpage
-       my $linktext=shift; # set to force the link text to something
+       my %opts=@_;
+
+       $link=~s/\/$//;
 
        my $bestlink;
-       if (! $forcesubpage) {
+       if (! $opts{forcesubpage}) {
                $bestlink=bestlink($lpage, $link);
        }
        else {
                $bestlink="$lpage/".lc($link);
        }
 
-       $linktext=pagetitle(basename($link)) unless defined $linktext;
+       my $linktext;
+       if (defined $opts{linktext}) {
+               $linktext=$opts{linktext};
+       }
+       else {
+               $linktext=pagetitle(basename($link));
+       }
        
-       return $linktext if length $bestlink && $page eq $bestlink;
+       return "<span class=\"selflink\">$linktext</span>"
+               if length $bestlink && $page eq $bestlink &&
+                  ! defined $opts{anchor};
        
-       # TODO BUG: %renderedfiles may not have it, if the linked to page
-       # was also added and isn't yet rendered! Note that this bug is
-       # masked by the bug that makes all new files be rendered twice.
-       if (! grep { $_ eq $bestlink } values %renderedfiles) {
+       if (! $destsources{$bestlink}) {
                $bestlink=htmlpage($bestlink);
-       }
-       if (! grep { $_ eq $bestlink } values %renderedfiles) {
-               return "<span><a href=\"".
-                       cgiurl(do => "create", page => $link, from => $page).
-                       "\">?</a>$linktext</span>"
+
+               if (! $destsources{$bestlink}) {
+                       return $linktext unless length $config{cgiurl};
+                       return "<span class=\"createlink\"><a href=\"".
+                               cgiurl(
+                                       do => "create",
+                                       page => lc($link),
+                                       from => $lpage
+                               ).
+                               "\" rel=\"nofollow\">?</a>$linktext</span>"
+               }
        }
        
-       $bestlink=abs2rel($bestlink, dirname($page));
+       $bestlink=abs2rel($bestlink, dirname(htmlpage($page)));
+       $bestlink=beautify_urlpath($bestlink);
        
-       if (! $noimageinline && isinlinableimage($bestlink)) {
+       if (! $opts{noimageinline} && isinlinableimage($bestlink)) {
                return "<img src=\"$bestlink\" alt=\"$linktext\" />";
        }
-       return "<a href=\"$bestlink\">$linktext</a>";
+
+       if (defined $opts{anchor}) {
+               $bestlink.="#".$opts{anchor};
+       }
+
+       my @attrs;
+       if (defined $opts{rel}) {
+               push @attrs, ' rel="'.$opts{rel}.'"';
+       }
+       if (defined $opts{class}) {
+               push @attrs, ' class="'.$opts{class}.'"';
+       }
+
+       return "<a href=\"$bestlink\"@attrs>$linktext</a>";
+} #}}}
+
+sub userlink ($) { #{{{
+       my $user=shift;
+
+       my $oiduser=eval { openiduser($user) };
+       if (defined $oiduser) {
+               return "<a href=\"$user\">$oiduser</a>";
+       }
+       else {
+               eval q{use CGI 'escapeHTML'};
+               error($@) if $@;
+
+               return htmllink("", "", escapeHTML(
+                       length $config{userdir} ? $config{userdir}."/".$user : $user
+               ), noimageinline => 1);
+       }
+} #}}}
+
+sub htmlize ($$$$) { #{{{
+       my $page=shift;
+       my $destpage=shift;
+       my $type=shift;
+       my $content=shift;
+       
+       my $oneline = $content !~ /\n/;
+
+       if (exists $hooks{htmlize}{$type}) {
+               $content=$hooks{htmlize}{$type}{call}->(
+                       page => $page,
+                       content => $content,
+               );
+       }
+       else {
+               error("htmlization of $type not supported");
+       }
+
+       run_hooks(sanitize => sub {
+               $content=shift->(
+                       page => $page,
+                       destpage => $destpage,
+                       content => $content,
+               );
+       });
+       
+       if ($oneline) {
+               # hack to get rid of enclosing junk added by markdown
+               # and other htmlizers
+               $content=~s/^<p>//i;
+               $content=~s/<\/p>$//i;
+               chomp $content;
+       }
+
+       return $content;
+} #}}}
+
+sub linkify ($$$) { #{{{
+       my $page=shift;
+       my $destpage=shift;
+       my $content=shift;
+
+       run_hooks(linkify => sub {
+               $content=shift->(
+                       page => $page,
+                       destpage => $destpage,
+                       content => $content,
+               );
+       });
+       
+       return $content;
+} #}}}
+
+our %preprocessing;
+our $preprocess_preview=0;
+sub preprocess ($$$;$$) { #{{{
+       my $page=shift; # the page the data comes from
+       my $destpage=shift; # the page the data will appear in (different for inline)
+       my $content=shift;
+       my $scan=shift;
+       my $preview=shift;
+
+       # Using local because it needs to be set within any nested calls
+       # of this function.
+       local $preprocess_preview=$preview if defined $preview;
+
+       my $handle=sub {
+               my $escape=shift;
+               my $prefix=shift;
+               my $command=shift;
+               my $params=shift;
+               if (length $escape) {
+                       return "[[$prefix$command $params]]";
+               }
+               elsif (exists $hooks{preprocess}{$command}) {
+                       return "" if $scan && ! $hooks{preprocess}{$command}{scan};
+                       # Note: preserve order of params, some plugins may
+                       # consider it significant.
+                       my @params;
+                       while ($params =~ m{
+                               (?:([-\w]+)=)?          # 1: named parameter key?
+                               (?:
+                                       """(.*?)"""     # 2: triple-quoted value
+                               |
+                                       "([^"]+)"       # 3: single-quoted value
+                               |
+                                       (\S+)           # 4: unquoted value
+                               )
+                               (?:\s+|$)               # delimiter to next param
+                       }sgx) {
+                               my $key=$1;
+                               my $val;
+                               if (defined $2) {
+                                       $val=$2;
+                                       $val=~s/\r\n/\n/mg;
+                                       $val=~s/^\n+//g;
+                                       $val=~s/\n+$//g;
+                               }
+                               elsif (defined $3) {
+                                       $val=$3;
+                               }
+                               elsif (defined $4) {
+                                       $val=$4;
+                               }
+
+                               if (defined $key) {
+                                       push @params, $key, $val;
+                               }
+                               else {
+                                       push @params, $val, '';
+                               }
+                       }
+                       if ($preprocessing{$page}++ > 3) {
+                               # Avoid loops of preprocessed pages preprocessing
+                               # other pages that preprocess them, etc.
+                               #translators: The first parameter is a
+                               #translators: preprocessor directive name,
+                               #translators: the second a page name, the
+                               #translators: third a number.
+                               return "[[".sprintf(gettext("%s preprocessing loop detected on %s at depth %i"),
+                                       $command, $page, $preprocessing{$page}).
+                               "]]";
+                       }
+                       my $ret;
+                       if (! $scan) {
+                               $ret=$hooks{preprocess}{$command}{call}->(
+                                       @params,
+                                       page => $page,
+                                       destpage => $destpage,
+                                       preview => $preprocess_preview,
+                               );
+                       }
+                       else {
+                               # use void context during scan pass
+                               $hooks{preprocess}{$command}{call}->(
+                                       @params,
+                                       page => $page,
+                                       destpage => $destpage,
+                                       preview => $preprocess_preview,
+                               );
+                               $ret="";
+                       }
+                       $preprocessing{$page}--;
+                       return $ret;
+               }
+               else {
+                       return "[[$prefix$command $params]]";
+               }
+       };
+       
+       my $regex;
+       if ($config{prefix_directives}) {
+               $regex = qr{
+                       (\\?)           # 1: escape?
+                       \[\[(!)         # directive open; 2: prefix
+                       ([-\w]+)        # 3: command
+                       (               # 4: the parameters..
+                               \s+     # Must have space if parameters present
+                               (?:
+                                       (?:[-\w]+=)?            # named parameter key?
+                                       (?:
+                                               """.*?"""       # triple-quoted value
+                                               |
+                                               "[^"]+"         # single-quoted value
+                                               |
+                                               [^\s\]]+        # unquoted value
+                                       )
+                                       \s*                     # whitespace or end
+                                                               # of directive
+                               )
+                       *)?             # 0 or more parameters
+                       \]\]            # directive closed
+               }sx;
+       } else {
+               $regex = qr{
+                       (\\?)           # 1: escape?
+                       \[\[(!?)        # directive open; 2: optional prefix
+                       ([-\w]+)        # 3: command
+                       \s+
+                       (               # 4: the parameters..
+                               (?:
+                                       (?:[-\w]+=)?            # named parameter key?
+                                       (?:
+                                               """.*?"""       # triple-quoted value
+                                               |
+                                               "[^"]+"         # single-quoted value
+                                               |
+                                               [^\s\]]+        # unquoted value
+                                       )
+                                       \s*                     # whitespace or end
+                                                               # of directive
+                               )
+                       *)              # 0 or more parameters
+                       \]\]            # directive closed
+               }sx;
+       }
+
+       $content =~ s{$regex}{$handle->($1, $2, $3, $4)}eg;
+       return $content;
+} #}}}
+
+sub filter ($$$) { #{{{
+       my $page=shift;
+       my $destpage=shift;
+       my $content=shift;
+
+       run_hooks(filter => sub {
+               $content=shift->(page => $page, destpage => $destpage, 
+                       content => $content);
+       });
+
+       return $content;
 } #}}}
 
 sub indexlink () { #{{{
        return "<a href=\"$config{url}\">$config{wikiname}</a>";
 } #}}}
 
-sub lockwiki () { #{{{
+my $wikilock;
+
+sub lockwiki (;$) { #{{{
+       my $wait=@_ ? shift : 1;
        # Take an exclusive lock on the wiki to prevent multiple concurrent
        # run issues. The lock will be dropped on program exit.
        if (! -d $config{wikistatedir}) {
                mkdir($config{wikistatedir});
        }
-       open(WIKILOCK, ">$config{wikistatedir}/lockfile") ||
+       open($wikilock, '>', "$config{wikistatedir}/lockfile") ||
                error ("cannot write to $config{wikistatedir}/lockfile: $!");
-       if (! flock(WIKILOCK, 2 | 4)) {
-               debug("wiki seems to be locked, waiting for lock");
-               my $wait=600; # arbitrary, but don't hang forever to 
-                             # prevent process pileup
-               for (1..600) {
-                       return if flock(WIKILOCK, 2 | 4);
-                       sleep 1;
+       if (! flock($wikilock, 2 | 4)) { # LOCK_EX | LOCK_NB
+               if ($wait) {
+                       debug("wiki seems to be locked, waiting for lock");
+                       my $wait=600; # arbitrary, but don't hang forever to 
+                                     # prevent process pileup
+                       for (1..$wait) {
+                               return if flock($wikilock, 2 | 4);
+                               sleep 1;
+                       }
+                       error("wiki is locked; waited $wait seconds without lock being freed (possible stuck process or stale lock?)");
+               }
+               else {
+                       return 0;
                }
-               error("wiki is locked; waited $wait seconds without lock being freed (possible stuck process or stale lock?)");
        }
+       return 1;
 } #}}}
 
 sub unlockwiki () { #{{{
-       close WIKILOCK;
+       return close($wikilock) if $wikilock;
+       return;
 } #}}}
 
-sub loadindex () { #{{{
-       open (IN, "$config{wikistatedir}/index") || return;
-       while (<IN>) {
-               $_=possibly_foolish_untaint($_);
-               chomp;
-               my %items;
-               $items{link}=[];
-               foreach my $i (split(/ /, $_)) {
-                       my ($item, $val)=split(/=/, $i, 2);
-                       push @{$items{$item}}, $val;
-               }
+my $commitlock;
 
-               next unless exists $items{src}; # skip bad lines for now
+sub commit_hook_enabled () { #{{{
+       open($commitlock, '+>', "$config{wikistatedir}/commitlock") ||
+               error("cannot write to $config{wikistatedir}/commitlock: $!");
+       if (! flock($commitlock, 1 | 4)) { # LOCK_SH | LOCK_NB to test
+               close($commitlock) || error("failed closing commitlock: $!");
+               return 0;
+       }
+       close($commitlock) || error("failed closing commitlock: $!");
+       return 1;
+} #}}}
 
-               my $page=pagename($items{src}[0]);
+sub disable_commit_hook () { #{{{
+       open($commitlock, '>', "$config{wikistatedir}/commitlock") ||
+               error("cannot write to $config{wikistatedir}/commitlock: $!");
+       if (! flock($commitlock, 2)) { # LOCK_EX
+               error("failed to get commit lock");
+       }
+       return 1;
+} #}}}
+
+sub enable_commit_hook () { #{{{
+       return close($commitlock) if $commitlock;
+       return;
+} #}}}
+
+sub loadindex () { #{{{
+       %oldrenderedfiles=%pagectime=();
+       if (! $config{rebuild}) {
+               %pagesources=%pagemtime=%oldlinks=%links=%depends=
+               %destsources=%renderedfiles=%pagecase=%pagestate=();
+       }
+       my $in;
+       if (! open ($in, "<", "$config{wikistatedir}/indexdb")) {
+               if (-e "$config{wikistatedir}/index") {
+                       system("ikiwiki-transition", "indexdb", $config{srcdir});
+                       open ($in, "<", "$config{wikistatedir}/indexdb") || return;
+               }
+               else {
+                       return;
+               }
+       }
+       my $ret=Storable::fd_retrieve($in);
+       if (! defined $ret) {
+               return 0;
+       }
+       my %index=%$ret;
+       foreach my $src (keys %index) {
+               my %d=%{$index{$src}};
+               my $page=pagename($src);
+               $pagectime{$page}=$d{ctime};
                if (! $config{rebuild}) {
-                       $pagesources{$page}=$items{src}[0];
-                       $oldpagemtime{$page}=$items{mtime}[0];
-                       $oldlinks{$page}=[@{$items{link}}];
-                       $links{$page}=[@{$items{link}}];
-                       $depends{$page}=join(" ", @{$items{depends}})
-                               if exists $items{depends};
-                       $renderedfiles{$page}=$items{dest}[0];
+                       $pagesources{$page}=$src;
+                       $pagemtime{$page}=$d{mtime};
+                       $renderedfiles{$page}=$d{dest};
+                       if (exists $d{links} && ref $d{links}) {
+                               $links{$page}=$d{links};
+                               $oldlinks{$page}=[@{$d{links}}];
+                       }
+                       if (exists $d{depends}) {
+                               $depends{$page}=$d{depends};
+                       }
+                       if (exists $d{state}) {
+                               $pagestate{$page}=$d{state};
+                       }
                }
-               $pagectime{$page}=$items{ctime}[0];
+               $oldrenderedfiles{$page}=[@{$d{dest}}];
+       }
+       foreach my $page (keys %pagesources) {
+               $pagecase{lc $page}=$page;
+       }
+       foreach my $page (keys %renderedfiles) {
+               $destsources{$_}=$page foreach @{$renderedfiles{$page}};
        }
-       close IN;
+       return close($in);
 } #}}}
 
 sub saveindex () { #{{{
+       run_hooks(savestate => sub { shift->() });
+
+       my %hookids;
+       foreach my $type (keys %hooks) {
+               $hookids{$_}=1 foreach keys %{$hooks{$type}};
+       }
+       my @hookids=keys %hookids;
+
        if (! -d $config{wikistatedir}) {
                mkdir($config{wikistatedir});
        }
-       open (OUT, ">$config{wikistatedir}/index") || 
-               error("cannot write to $config{wikistatedir}/index: $!");
-       foreach my $page (keys %oldpagemtime) {
-               next unless $oldpagemtime{$page};
-               my $line="mtime=$oldpagemtime{$page} ".
-                       "ctime=$pagectime{$page} ".
-                       "src=$pagesources{$page} ".
-                       "dest=$renderedfiles{$page}";
-               $line.=" link=$_" foreach @{$links{$page}};
+       my $newfile="$config{wikistatedir}/indexdb.new";
+       my $cleanup = sub { unlink($newfile) };
+       open (my $out, '>', $newfile) || error("cannot write to $newfile: $!", $cleanup);
+       my %index;
+       foreach my $page (keys %pagemtime) {
+               next unless $pagemtime{$page};
+               my $src=$pagesources{$page};
+
+               $index{$src}={
+                       ctime => $pagectime{$page},
+                       mtime => $pagemtime{$page},
+                       dest => $renderedfiles{$page},
+                       links => $links{$page},
+               };
+
                if (exists $depends{$page}) {
-                       $line.=" depends=$_" foreach split " ", $depends{$page};
+                       $index{$src}{depends} = $depends{$page};
+               }
+
+               if (exists $pagestate{$page}) {
+                       foreach my $id (@hookids) {
+                               foreach my $key (keys %{$pagestate{$page}{$id}}) {
+                                       $index{$src}{state}{$id}{$key}=$pagestate{$page}{$id}{$key};
+                               }
+                       }
                }
-               print OUT $line."\n";
        }
-       close OUT;
+       my $ret=Storable::nstore_fd(\%index, $out);
+       return if ! defined $ret || ! $ret;
+       close $out || error("failed saving to $newfile: $!", $cleanup);
+       rename($newfile, "$config{wikistatedir}/indexdb") ||
+               error("failed renaming $newfile to $config{wikistatedir}/indexdb", $cleanup);
+       
+       return 1;
+} #}}}
+
+sub template_file ($) { #{{{
+       my $template=shift;
+
+       foreach my $dir ($config{templatedir}, "$installdir/share/ikiwiki/templates") {
+               return "$dir/$template" if -e "$dir/$template";
+       }
+       return;
 } #}}}
 
 sub template_params (@) { #{{{
-       my $filename=shift;
-       
-       require HTML::Template;
-       return filter => sub {
+       my $filename=template_file(shift);
+
+       if (! defined $filename) {
+               return if wantarray;
+               return "";
+       }
+
+       my @ret=(
+               filter => sub {
                        my $text_ref = shift;
-                       $$text_ref=&Encode::decode_utf8($$text_ref);
+                       ${$text_ref} = decode_utf8(${$text_ref});
                },
-               filename => "$config{templatedir}/$filename", @_;
+               filename => $filename,
+               loop_context_vars => 1,
+               die_on_bad_params => 0,
+               @_
+       );
+       return wantarray ? @ret : {@ret};
 } #}}}
 
 sub template ($;@) { #{{{
-       HTML::Template->new(template_params(@_));
+       require HTML::Template;
+       return HTML::Template->new(template_params(@_));
 } #}}}
 
-sub misctemplate ($$) { #{{{
+sub misctemplate ($$;@) { #{{{
        my $title=shift;
        my $pagebody=shift;
        
@@ -444,63 +1071,402 @@ sub misctemplate ($$) { #{{{
                indexlink => indexlink(),
                wikiname => $config{wikiname},
                pagebody => $pagebody,
-               styleurl => styleurl(),
-               baseurl => "$config{url}/",
+               baseurl => baseurl(),
+               @_,
        );
+       run_hooks(pagetemplate => sub {
+               shift->(page => "", destpage => "", template => $template);
+       });
        return $template->output;
 }#}}}
 
-sub glob_match ($$) { #{{{
-       my $page=shift;
-       my $glob=shift;
+sub hook (@) { # {{{
+       my %param=@_;
+       
+       if (! exists $param{type} || ! ref $param{call} || ! exists $param{id}) {
+               error 'hook requires type, call, and id parameters';
+       }
 
-       if ($glob =~ /^link\((.+)\)$/) {
-               my $rev = $links{$page} or return undef;
-               foreach my $p (@$rev) {
-                       return 1 if lc $p eq $1;
+       return if $param{no_override} && exists $hooks{$param{type}}{$param{id}};
+       
+       $hooks{$param{type}}{$param{id}}=\%param;
+       return 1;
+} # }}}
+
+sub run_hooks ($$) { # {{{
+       # Calls the given sub for each hook of the given type,
+       # passing it the hook function to call.
+       my $type=shift;
+       my $sub=shift;
+
+       if (exists $hooks{$type}) {
+               my @deferred;
+               foreach my $id (keys %{$hooks{$type}}) {
+                       if ($hooks{$type}{$id}{last}) {
+                               push @deferred, $id;
+                               next;
+                       }
+                       $sub->($hooks{$type}{$id}{call});
                }
-               return 0;
-       } elsif ($glob =~ /^backlink\((.+)\)$/) {
-               my $rev = $links{$1} or return undef;
-               foreach my $p (@$rev) {
-                       return 1 if lc $p eq $page;
+               foreach my $id (@deferred) {
+                       $sub->($hooks{$type}{$id}{call});
                }
-               return 0;
-       } else {
-               # turn glob into safe regexp
-               $glob=quotemeta($glob);
-               $glob=~s/\\\*/.*/g;
-               $glob=~s/\\\?/./g;
-               $glob=~s!\\/!/!g;
-               
-               return $page=~/^$glob$/i;
        }
+
+       return 1;
 } #}}}
 
-sub globlist_match ($$) { #{{{
-       my $page=shift;
-       my @globlist=split(" ", shift);
+sub globlist_to_pagespec ($) { #{{{
+       my @globlist=split(' ', shift);
 
-       # check any negated globs first
+       my (@spec, @skip);
        foreach my $glob (@globlist) {
-               return 0 if $glob=~/^!(.*)/ && glob_match($page, $1);
+               if ($glob=~/^!(.*)/) {
+                       push @skip, $glob;
+               }
+               else {
+                       push @spec, $glob;
+               }
        }
 
-       foreach my $glob (@globlist) {
-               return 1 if glob_match($page, $glob);
+       my $spec=join(' or ', @spec);
+       if (@skip) {
+               my $skip=join(' and ', @skip);
+               if (length $spec) {
+                       $spec="$skip and ($spec)";
+               }
+               else {
+                       $spec=$skip;
+               }
        }
-       
-       return 0;
+       return $spec;
 } #}}}
 
-sub hook (@) { # {{{
-       my %param=@_;
+sub is_globlist ($) { #{{{
+       my $s=shift;
+       return ( $s =~ /[^\s]+\s+([^\s]+)/ && $1 ne "and" && $1 ne "or" );
+} #}}}
+
+sub safequote ($) { #{{{
+       my $s=shift;
+       $s=~s/[{}]//g;
+       return "q{$s}";
+} #}}}
+
+sub add_depends ($$) { #{{{
+       my $page=shift;
+       my $pagespec=shift;
        
-       if (! exists $param{type} || ! ref $param{call} || ! exists $param{id}) {
-               error "hook requires type, call, and id parameters";
+       return unless pagespec_valid($pagespec);
+
+       if (! exists $depends{$page}) {
+               $depends{$page}=$pagespec;
        }
-       
-       $hooks{$param{type}}{$param{id}}=\%param;
+       else {
+               $depends{$page}=pagespec_merge($depends{$page}, $pagespec);
+       }
+
+       return 1;
 } # }}}
 
+sub file_pruned ($$) { #{{{
+       require File::Spec;
+       my $file=File::Spec->canonpath(shift);
+       my $base=File::Spec->canonpath(shift);
+       $file =~ s#^\Q$base\E/+##;
+
+       my $regexp='('.join('|', @{$config{wiki_file_prune_regexps}}).')';
+       return $file =~ m/$regexp/ && $file ne $base;
+} #}}}
+
+sub gettext { #{{{
+       # Only use gettext in the rare cases it's needed.
+       if ((exists $ENV{LANG} && length $ENV{LANG}) ||
+           (exists $ENV{LC_ALL} && length $ENV{LC_ALL}) ||
+           (exists $ENV{LC_MESSAGES} && length $ENV{LC_MESSAGES})) {
+               if (! $gettext_obj) {
+                       $gettext_obj=eval q{
+                               use Locale::gettext q{textdomain};
+                               Locale::gettext->domain('ikiwiki')
+                       };
+                       if ($@) {
+                               print STDERR "$@";
+                               $gettext_obj=undef;
+                               return shift;
+                       }
+               }
+               return $gettext_obj->get(shift);
+       }
+       else {
+               return shift;
+       }
+} #}}}
+
+sub yesno ($) { #{{{
+       my $val=shift;
+
+       return (defined $val && lc($val) eq gettext("yes"));
+} #}}}
+
+sub pagespec_merge ($$) { #{{{
+       my $a=shift;
+       my $b=shift;
+
+       return $a if $a eq $b;
+
+        # Support for old-style GlobLists.
+        if (is_globlist($a)) {
+                $a=globlist_to_pagespec($a);
+        }
+        if (is_globlist($b)) {
+                $b=globlist_to_pagespec($b);
+        }
+
+       return "($a) or ($b)";
+} #}}}
+
+sub pagespec_translate ($) { #{{{
+       my $spec=shift;
+
+       # Support for old-style GlobLists.
+       if (is_globlist($spec)) {
+               $spec=globlist_to_pagespec($spec);
+       }
+
+       # Convert spec to perl code.
+       my $code="";
+       while ($spec=~m{
+               \s*             # ignore whitespace
+               (               # 1: match a single word
+                       \!              # !
+               |
+                       \(              # (
+               |
+                       \)              # )
+               |
+                       \w+\([^\)]*\)   # command(params)
+               |
+                       [^\s()]+        # any other text
+               )
+               \s*             # ignore whitespace
+       }igx) {
+               my $word=$1;
+               if (lc $word eq 'and') {
+                       $code.=' &&';
+               }
+               elsif (lc $word eq 'or') {
+                       $code.=' ||';
+               }
+               elsif ($word eq "(" || $word eq ")" || $word eq "!") {
+                       $code.=' '.$word;
+               }
+               elsif ($word =~ /^(\w+)\((.*)\)$/) {
+                       if (exists $IkiWiki::PageSpec::{"match_$1"}) {
+                               $code.="IkiWiki::PageSpec::match_$1(\$page, ".safequote($2).", \@_)";
+                       }
+                       else {
+                               $code.=' 0';
+                       }
+               }
+               else {
+                       $code.=" IkiWiki::PageSpec::match_glob(\$page, ".safequote($word).", \@_)";
+               }
+       }
+
+       if (! length $code) {
+               $code=0;
+       }
+
+       no warnings;
+       return eval 'sub { my $page=shift; '.$code.' }';
+} #}}}
+
+sub pagespec_match ($$;@) { #{{{
+       my $page=shift;
+       my $spec=shift;
+       my @params=@_;
+
+       # Backwards compatability with old calling convention.
+       if (@params == 1) {
+               unshift @params, 'location';
+       }
+
+       my $sub=pagespec_translate($spec);
+       return IkiWiki::FailReason->new("syntax error in pagespec \"$spec\"") if $@;
+       return $sub->($page, @params);
+} #}}}
+
+sub pagespec_valid ($) { #{{{
+       my $spec=shift;
+
+       my $sub=pagespec_translate($spec);
+       return ! $@;
+} #}}}
+       
+sub glob2re ($) { #{{{
+       my $re=quotemeta(shift);
+       $re=~s/\\\*/.*/g;
+       $re=~s/\\\?/./g;
+       return $re;
+} #}}}
+
+package IkiWiki::FailReason;
+
+use overload ( #{{{
+       '""'    => sub { ${$_[0]} },
+       '0+'    => sub { 0 },
+       '!'     => sub { bless $_[0], 'IkiWiki::SuccessReason'},
+       fallback => 1,
+); #}}}
+
+sub new { #{{{
+       my $class = shift;
+       my $value = shift;
+       return bless \$value, $class;
+} #}}}
+
+package IkiWiki::SuccessReason;
+
+use overload ( #{{{
+       '""'    => sub { ${$_[0]} },
+       '0+'    => sub { 1 },
+       '!'     => sub { bless $_[0], 'IkiWiki::FailReason'},
+       fallback => 1,
+); #}}}
+
+sub new { #{{{
+       my $class = shift;
+       my $value = shift;
+       return bless \$value, $class;
+}; #}}}
+
+package IkiWiki::PageSpec;
+
+sub match_glob ($$;@) { #{{{
+       my $page=shift;
+       my $glob=shift;
+       my %params=@_;
+       
+       my $from=exists $params{location} ? $params{location} : '';
+       
+       # relative matching
+       if ($glob =~ m!^\./!) {
+               $from=~s#/?[^/]+$##;
+               $glob=~s#^\./##;
+               $glob="$from/$glob" if length $from;
+       }
+
+       my $regexp=IkiWiki::glob2re($glob);
+       if ($page=~/^$regexp$/i) {
+               if (! IkiWiki::isinternal($page) || $params{internal}) {
+                       return IkiWiki::SuccessReason->new("$glob matches $page");
+               }
+               else {
+                       return IkiWiki::FailReason->new("$glob matches $page, but the page is an internal page");
+               }
+       }
+       else {
+               return IkiWiki::FailReason->new("$glob does not match $page");
+       }
+} #}}}
+
+sub match_internal ($$;@) { #{{{
+       return match_glob($_[0], $_[1], @_, internal => 1)
+} #}}}
+
+sub match_link ($$;@) { #{{{
+       my $page=shift;
+       my $link=lc(shift);
+       my %params=@_;
+
+       my $from=exists $params{location} ? $params{location} : '';
+
+       # relative matching
+       if ($link =~ m!^\.! && defined $from) {
+               $from=~s#/?[^/]+$##;
+               $link=~s#^\./##;
+               $link="$from/$link" if length $from;
+       }
+
+       my $links = $IkiWiki::links{$page};
+       return IkiWiki::FailReason->new("$page has no links") unless $links && @{$links};
+       my $bestlink = IkiWiki::bestlink($from, $link);
+       foreach my $p (@{$links}) {
+               if (length $bestlink) {
+                       return IkiWiki::SuccessReason->new("$page links to $link")
+                               if $bestlink eq IkiWiki::bestlink($page, $p);
+               }
+               else {
+                       return IkiWiki::SuccessReason->new("$page links to page $p matching $link")
+                               if match_glob($p, $link, %params);
+               }
+       }
+       return IkiWiki::FailReason->new("$page does not link to $link");
+} #}}}
+
+sub match_backlink ($$;@) { #{{{
+       return match_link($_[1], $_[0], @_);
+} #}}}
+
+sub match_created_before ($$;@) { #{{{
+       my $page=shift;
+       my $testpage=shift;
+
+       if (exists $IkiWiki::pagectime{$testpage}) {
+               if ($IkiWiki::pagectime{$page} < $IkiWiki::pagectime{$testpage}) {
+                       return IkiWiki::SuccessReason->new("$page created before $testpage");
+               }
+               else {
+                       return IkiWiki::FailReason->new("$page not created before $testpage");
+               }
+       }
+       else {
+               return IkiWiki::FailReason->new("$testpage has no ctime");
+       }
+} #}}}
+
+sub match_created_after ($$;@) { #{{{
+       my $page=shift;
+       my $testpage=shift;
+
+       if (exists $IkiWiki::pagectime{$testpage}) {
+               if ($IkiWiki::pagectime{$page} > $IkiWiki::pagectime{$testpage}) {
+                       return IkiWiki::SuccessReason->new("$page created after $testpage");
+               }
+               else {
+                       return IkiWiki::FailReason->new("$page not created after $testpage");
+               }
+       }
+       else {
+               return IkiWiki::FailReason->new("$testpage has no ctime");
+       }
+} #}}}
+
+sub match_creation_day ($$;@) { #{{{
+       if ((gmtime($IkiWiki::pagectime{shift()}))[3] == shift) {
+               return IkiWiki::SuccessReason->new('creation_day matched');
+       }
+       else {
+               return IkiWiki::FailReason->new('creation_day did not match');
+       }
+} #}}}
+
+sub match_creation_month ($$;@) { #{{{
+       if ((gmtime($IkiWiki::pagectime{shift()}))[4] + 1 == shift) {
+               return IkiWiki::SuccessReason->new('creation_month matched');
+       }
+       else {
+               return IkiWiki::FailReason->new('creation_month did not match');
+       }
+} #}}}
+
+sub match_creation_year ($$;@) { #{{{
+       if ((gmtime($IkiWiki::pagectime{shift()}))[5] + 1900 == shift) {
+               return IkiWiki::SuccessReason->new('creation_year matched');
+       }
+       else {
+               return IkiWiki::FailReason->new('creation_year did not match');
+       }
+} #}}}
+
 1