X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/f877845353e5f8cfe6d3bdad625b9c2bacee878e..62126ad847c7e0395842e5f4acb8f1c48c260364:/IkiWiki.pm?ds=inline

diff --git a/IkiWiki.pm b/IkiWiki.pm
index d7c082b1d..2392c787b 100644
--- a/IkiWiki.pm
+++ b/IkiWiki.pm
@@ -4,54 +4,103 @@ package IkiWiki;
 use warnings;
 use strict;
 use Encode;
+use HTML::Entities;
 use open qw{:utf8 :std};
 
-use vars qw{%config %links %oldlinks %oldpagemtime %pagectime
-            %renderedfiles %pagesources %depends %hooks};
+use vars qw{%config %links %oldlinks %oldpagemtime %pagectime %pagecase
+            %renderedfiles %oldrenderedfiles %pagesources %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
+                 %config %links %renderedfiles %pagesources);
+our $VERSION = 1.01; # 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");
+memoize("pagespec_translate");
+memoize("file_pruned");
 
 sub defaultconfig () { #{{{
-	wiki_file_prune_regexp => qr{((^|/).svn/|\.\.|^\.|\/\.|\.html?$|\.rss$)},
+	wiki_file_prune_regexps => [qr/\.\./, qr/^\./, qr/\/\./,
+		qr/\.x?html?$/, qr/\.ikiwiki-new$/,
+		qr/(^|\/).svn\//, qr/.arch-ids\//, qr/{arch}\//],
 	wiki_link_regexp => qr/\[\[(?:([^\]\|]+)\|)?([^\s\]]+)\]\]/,
-	wiki_processor_regexp => qr/\[\[(\w+)\s+([^\]]*)\]\]/,
 	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",
 	cgi => 0,
-	rcs => 'svn',
+	rcs => '',
 	notify => 0,
 	url => '',
 	cgiurl => '',
 	historyurl => '',
 	diffurl => '',
-	anonok => 0,
 	rss => 0,
+	atom => 0,
 	discussion => 1,
 	rebuild => 0,
 	refresh => 0,
 	getctime => 0,
+	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",
 	setup => undef,
 	adminuser => undef,
 	adminemail => undef,
-	plugin => [qw{mdwn inline htmlscrubber}],
+	plugin => [qw{mdwn inline htmlscrubber passwordauth signinedit
+	              lockedit conditional}],
 	timeformat => '%c',
+	locale => undef,
+	sslcookie => 0,
+	httpauth => 0,
+	userdir => "",
 } #}}}
-	    
+   
 sub checkconfig () { #{{{
-	if ($config{cgi} && ! length $config{url}) {
-		error("Must specify url to wiki with --url when using --cgi\n");
+	# locale stuff; avoid LC_ALL since it overrides everything
+	if (defined $ENV{LC_ALL}) {
+		$ENV{LANG} = $ENV{LC_ALL};
+		delete $ENV{LC_ALL};
+	}
+	if (defined $config{locale}) {
+		eval q{use POSIX};
+		error($@) if $@;
+		if (POSIX::setlocale(&POSIX::LC_ALL, $config{locale})) {
+			$ENV{LANG}=$config{locale};
+			$gettext_obj=undef;
+		}
 	}
-	if ($config{rss} && ! length $config{url}) {
-		error("Must specify url to wiki with --url when using --rss\n");
+
+	if ($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}
+			unless $config{cgiurl} =~ m!file:///!;
+		$config{url}="file://".$config{destdir};
+	}
+
+	if ($config{cgi} && ! length $config{url}) {
+		error(gettext("Must specify url to wiki with --url when using --cgi"));
 	}
 	
 	$config{wikistatedir}="$config{srcdir}/.ikiwiki"
@@ -67,32 +116,68 @@ sub checkconfig () { #{{{
 		require IkiWiki::Rcs::Stub;
 	}
 
-	foreach my $plugin (@{$config{plugin}}) {
-		my $mod="IkiWiki::Plugin::".possibly_foolish_untaint($plugin);
-		eval qq{use $mod};
-		if ($@) {
-			error("Failed to load plugin $mod: $@");
-		}
+	run_hooks(checkconfig => sub { shift->() });
+} #}}}
+
+sub loadplugins () { #{{{
+	loadplugin($_) foreach @{$config{plugin}};
+	
+	run_hooks(getopt => sub { shift->() });
+	if (grep /^-/, @ARGV) {
+		print STDERR "Unknown option: $_\n"
+			foreach grep /^-/, @ARGV;
+		usage();
 	}
+} #}}}
 
-	if (exists $hooks{checkconfig}) {
-                foreach my $id (keys %{$hooks{checkconfig}}) {
-                        $hooks{checkconfig}{$id}{call}->();
-                }
-        }
+sub loadplugin ($) { #{{{
+	my $plugin=shift;
+
+	return if grep { $_ eq $plugin} @{$config{disable_plugins}};
+
+	my $mod="IkiWiki::Plugin::".possibly_foolish_untaint($plugin);
+	eval qq{use $mod};
+	if ($@) {
+		error("Failed to load plugin $mod: $@");
+	}
 } #}}}
 
-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(debug => $message) if $config{syslog};
+	if (defined $cleaner) {
+		$cleaner->();
 	}
-	die @_;
+	die $message."\n";
 } #}}}
 
 sub debug ($) { #{{{
 	return unless $config{verbose};
-	if (! $config{cgi}) {
+	log_message(debug => @_);
+} #}}}
+
+my $log_open=0;
+sub log_message ($$) { #{{{
+	my $type=shift;
+
+	if ($config{syslog}) {
+		require Sys::Syslog;
+		unless ($log_open) {
+			Sys::Syslog::setlogsock('unix');
+			Sys::Syslog::openlog('ikiwiki', '', 'user');
+			$log_open=1;
+		}
+		eval {
+			Sys::Syslog::syslog($type, "%s", join(" ", @_));
+		}
+	}
+	elsif (! $config{cgi}) {
 		print "@_\n";
 	}
 	else {
@@ -152,9 +237,10 @@ sub srcfile ($) { #{{{
 	error("internal error: $file cannot be found");
 } #}}}
 
-sub readfile ($;$) { #{{{
+sub readfile ($;$$) { #{{{
 	my $file=shift;
 	my $binary=shift;
+	my $wantfd=shift;
 
 	if (-l $file) {
 		error("cannot read a symlink ($file)");
@@ -163,16 +249,18 @@ sub readfile ($;$) { #{{{
 	local $/=undef;
 	open (IN, $file) || error("failed to read $file: $!");
 	binmode(IN) if ($binary);
+	return \*IN if $wantfd;
 	my $ret=<IN>;
-	close IN;
+	close IN || error("failed to read $file: $!");
 	return $ret;
 } #}}}
 
-sub writefile ($$$;$) { #{{{
+sub writefile ($$$;$$) { #{{{
 	my $file=shift; # can include subdirs
 	my $destdir=shift; # directory to put file in
 	my $content=shift;
 	my $binary=shift;
+	my $writer=shift;
 	
 	my $test=$file;
 	while (length $test) {
@@ -181,8 +269,12 @@ sub writefile ($$$;$) { #{{{
 		}
 		$test=dirname($test);
 	}
+	my $newfile="$destdir/$file.ikiwiki-new";
+	if (-l $newfile) {
+		error("cannot write to a symlink ($newfile)");
+	}
 
-	my $dir=dirname("$destdir/$file");
+	my $dir=dirname($newfile);
 	if (! -d $dir) {
 		my $d="";
 		foreach my $s (split(m!/+!, $dir)) {
@@ -192,34 +284,69 @@ sub writefile ($$$;$) { #{{{
 			}
 		}
 	}
-	
-	open (OUT, ">$destdir/$file") || error("failed to write $destdir/$file: $!");
+
+	my $cleanup = sub { unlink($newfile) };
+	open (OUT, ">$newfile") || error("failed to write $newfile: $!", $cleanup);
 	binmode(OUT) if ($binary);
-	print OUT $content;
-	close OUT;
+	if ($writer) {
+		$writer->(\*OUT, $cleanup);
+	}
+	else {
+		print OUT $content || error("failed writing to $newfile: $!", $cleanup);
+	}
+	close OUT || error("failed saving $newfile: $!", $cleanup);
+	rename($newfile, "$destdir/$file") || 
+		error("failed renaming $newfile to $destdir/$file: $!", $cleanup);
+} #}}}
+
+my %cleared;
+sub will_render ($$;$) { #{{{
+	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 {
+		$renderedfiles{$page}=[$dest];
+		$cleared{$page}=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="";
+	}
+
 	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} && exists $links{"$config{userdir}/".lc($link)}) {
+		return "$config{userdir}/".lc($link);
+	}
+
 	#print STDERR "warning: page $page, broken link: $link\n";
 	return "";
 } #}}}
@@ -230,10 +357,18 @@ sub isinlinableimage ($) { #{{{
 	$file=~/\.(png|gif|jpg|jpeg)$/i;
 } #}}}
 
-sub pagetitle ($) { #{{{
+sub pagetitle ($;$) { #{{{
 	my $page=shift;
-	$page=~s/__(\d+)__/&#$1;/g;
+	my $unescaped=shift;
+
+	if ($unescaped) {
+		$page=~s/__(\d+)__/chr($1)/eg;
+	}
+	else {
+		$page=~s/__(\d+)__/&#$1;/g;
+	}
 	$page=~y/_/ /;
+
 	return $page;
 } #}}}
 
@@ -250,14 +385,38 @@ sub cgiurl (@) { #{{{
 	return $config{cgiurl}."?".join("&amp;", map "$_=$params{$_}", keys %params);
 } #}}}
 
-sub styleurl (;$) { #{{{
+sub baseurl (;$) { #{{{
 	my $page=shift;
 
-	return "$config{url}/style.css" if ! defined $page;
+	return "$config{url}/" if ! defined $page;
 	
 	$page=~s/[^\/]+$//;
 	$page=~s/[^\/]+\//..\//g;
-	return $page."style.css";
+	return $page;
+} #}}}
+
+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! (Debian bug #376658; fixed in debian unstable now)
+	my $path="/".shift;
+	my $base="/".shift;
+
+	require File::Spec;
+	my $ret=File::Spec->abs2rel($path, $base);
+	$ret=~s/^// if defined $ret;
+	return $ret;
+} #}}}
+
+sub displaytime ($) { #{{{
+	my $time=shift;
+
+	eval q{use POSIX};
+	error($@) if $@;
+	# strftime doesn't know about encodings, so make sure
+	# its output is properly treated as utf8
+	return decode_utf8(POSIX::strftime(
+			$config{timeformat}, localtime($time)));
 } #}}}
 
 sub htmllink ($$$;$$$) { #{{{
@@ -278,22 +437,20 @@ sub htmllink ($$$;$$$) { #{{{
 
 	$linktext=pagetitle(basename($link)) unless defined $linktext;
 	
-	return $linktext if length $bestlink && $page eq $bestlink;
+	return "<span class=\"selflink\">$linktext</span>"
+		if length $bestlink && $page eq $bestlink;
 	
-	# 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 (! grep { $_ eq $bestlink } map { @{$_} } values %renderedfiles) {
 		$bestlink=htmlpage($bestlink);
 	}
-	if (! grep { $_ eq $bestlink } values %renderedfiles) {
+	if (! grep { $_ eq $bestlink } map { @{$_} } values %renderedfiles) {
+		return $linktext unless length $config{cgiurl};
 		return "<span><a href=\"".
-			cgiurl(do => "create", page => $link, from => $page).
+			cgiurl(do => "create", page => lc($link), from => $page).
 			"\">?</a>$linktext</span>"
 	}
 	
-	require File::Spec;
-	$bestlink=File::Spec->abs2rel($bestlink, dirname($page));
+	$bestlink=abs2rel($bestlink, dirname($page));
 	
 	if (! $noimageinline && isinlinableimage($bestlink)) {
 		return "<img src=\"$bestlink\" alt=\"$linktext\" />";
@@ -301,6 +458,125 @@ sub htmllink ($$$;$$$) { #{{{
 	return "<a href=\"$bestlink\">$linktext</a>";
 } #}}}
 
+sub htmlize ($$$) { #{{{
+	my $page=shift;
+	my $type=shift;
+	my $content=shift;
+
+	if (exists $hooks{htmlize}{$type}) {
+		$content=$hooks{htmlize}{$type}{call}->(
+			page => $page,
+			content => $content,
+		);
+	}
+	else {
+		error("htmlization of $type not supported");
+	}
+
+	run_hooks(sanitize => sub {
+		$content=shift->(
+			page => $page,
+			content => $content,
+		);
+	});
+
+	return $content;
+} #}}}
+
+sub linkify ($$$) { #{{{
+	my $lpage=shift; # the page containing the links
+	my $page=shift; # the page the link will end up on (different for inline)
+	my $content=shift;
+
+	$content =~ s{(\\?)$config{wiki_link_regexp}}{
+		$2 ? ( $1 ? "[[$2|$3]]" : htmllink($lpage, $page, titlepage($3), 0, 0, pagetitle($2)))
+		   : ( $1 ? "[[$3]]" :    htmllink($lpage, $page, titlepage($3)))
+	}eg;
+	
+	return $content;
+} #}}}
+
+my %preprocessing;
+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 $handle=sub {
+		my $escape=shift;
+		my $command=shift;
+		my $params=shift;
+		if (length $escape) {
+			return "[[$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 ($params =~ /(?:(\w+)=)?(?:"""(.*?)"""|"([^"]+)"|(\S+))(?:\s+|$)/sg) {
+				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 $ret=$hooks{preprocess}{$command}{call}->(
+				@params,
+				page => $page,
+				destpage => $destpage,
+			);
+			$preprocessing{$page}--;
+			return $ret;
+		}
+		else {
+			return "[[$command $params]]";
+		}
+	};
+	
+	$content =~ s{(\\?)\[\[(\w+)\s+((?:(?:\w+=)?(?:""".*?"""|"[^"]+"|[^\s\]]+)\s*)*)\]\]}{$handle->($1, $2, $3)}seg;
+	return $content;
+} #}}}
+
+sub filter ($$) { #{{{
+	my $page=shift;
+	my $content=shift;
+
+	run_hooks(filter => sub {
+		$content=shift->(page => $page, content => $content);
+	});
+
+	return $content;
+} #}}}
+
 sub indexlink () { #{{{
 	return "<a href=\"$config{url}\">$config{wikiname}</a>";
 } #}}}
@@ -317,7 +593,7 @@ sub lockwiki () { #{{{
 		debug("wiki seems to be locked, waiting for lock");
 		my $wait=600; # arbitrary, but don't hang forever to 
 		              # prevent process pileup
-		for (1..600) {
+		for (1..$wait) {
 			return if flock(WIKILOCK, 2 | 4);
 			sleep 1;
 		}
@@ -336,9 +612,10 @@ sub loadindex () { #{{{
 		chomp;
 		my %items;
 		$items{link}=[];
+		$items{dest}=[];
 		foreach my $i (split(/ /, $_)) {
 			my ($item, $val)=split(/=/, $i, 2);
-			push @{$items{$item}}, $val;
+			push @{$items{$item}}, decode_entities($val);
 		}
 
 		next unless exists $items{src}; # skip bad lines for now
@@ -349,9 +626,10 @@ sub loadindex () { #{{{
 			$oldpagemtime{$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];
+			$depends{$page}=$items{depends}[0] if exists $items{depends};
+			$renderedfiles{$page}=[@{$items{dest}}];
+			$oldrenderedfiles{$page}=[@{$items{dest}}];
+			$pagecase{lc $page}=$page;
 		}
 		$pagectime{$page}=$items{ctime}[0];
 	}
@@ -359,42 +637,68 @@ sub loadindex () { #{{{
 } #}}}
 
 sub saveindex () { #{{{
+	run_hooks(savestate => sub { shift->() });
+
 	if (! -d $config{wikistatedir}) {
 		mkdir($config{wikistatedir});
 	}
-	open (OUT, ">$config{wikistatedir}/index") || 
-		error("cannot write to $config{wikistatedir}/index: $!");
+	my $newfile="$config{wikistatedir}/index.new";
+	my $cleanup = sub { unlink($newfile) };
+	open (OUT, ">$newfile") || error("cannot write to $newfile: $!", $cleanup);
 	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}};
+			"src=$pagesources{$page}";
+		$line.=" dest=$_" foreach @{$renderedfiles{$page}};
+		my %count;
+		$line.=" link=$_" foreach grep { ++$count{$_} == 1 } @{$links{$page}};
 		if (exists $depends{$page}) {
-			$line.=" depends=$_" foreach split " ", $depends{$page};
+			$line.=" depends=".encode_entities($depends{$page}, " \t\n");
 		}
-		print OUT $line."\n";
+		print OUT $line."\n" || error("failed writing to $newfile: $!", $cleanup);
 	}
-	close OUT;
+	close OUT || error("failed saving to $newfile: $!", $cleanup);
+	rename($newfile, "$config{wikistatedir}/index") ||
+		error("failed renaming $newfile to $config{wikistatedir}/index", $cleanup);
+} #}}}
+
+sub template_file ($) { #{{{
+	my $template=shift;
+
+	foreach my $dir ($config{templatedir}, "$installdir/share/ikiwiki/templates") {
+		return "$dir/$template" if -e "$dir/$template";
+	}
+	return undef;
 } #}}}
 
 sub template_params (@) { #{{{
-	my $filename=shift;
-	
+	my $filename=template_file(shift);
+
+	if (! defined $filename) {
+		return if wantarray;
+		return "";
+	}
+
 	require HTML::Template;
-	return filter => sub {
+	my @ret=(
+		filter => sub {
 			my $text_ref = shift;
 			$$text_ref=&Encode::decode_utf8($$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(@_));
 } #}}}
 
-sub misctemplate ($$) { #{{{
+sub misctemplate ($$;@) { #{{{
 	my $title=shift;
 	my $pagebody=shift;
 	
@@ -404,63 +708,266 @@ 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";
+	}
+
+	return if $param{no_override} && exists $hooks{$param{type}}{$param{id}};
+	
+	$hooks{$param{type}}{$param{id}}=\%param;
+} # }}}
 
-	if ($glob =~ /^link\((.+)\)$/) {
-		my $rev = $links{$page} or return undef;
-		foreach my $p (@$rev) {
-			return 1 if lc $p eq $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;
 	}
 } #}}}
 
-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;
+	$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";
+	if (! exists $depends{$page}) {
+		$depends{$page}=$pagespec;
+	}
+	else {
+		$depends{$page}=pagespec_merge($depends{$page}, $pagespec);
 	}
-	
-	$hooks{$param{type}}{$param{id}}=\%param;
 } # }}}
 
+sub file_pruned ($$) { #{{{
+	require File::Spec;
+	my $file=File::Spec->canonpath(shift);
+	my $base=File::Spec->canonpath(shift);
+	$file=~s#^\Q$base\E/*##;
+
+	my $regexp='('.join('|', @{$config{wiki_file_prune_regexps}}).')';
+	$file =~ m/$regexp/;
+} #}}}
+
+sub gettext { #{{{
+	# Only use gettext in the rare cases it's needed.
+	if (exists $ENV{LANG} || exists $ENV{LC_ALL} || exists $ENV{LC_MESSAGES}) {
+		if (! $gettext_obj) {
+			$gettext_obj=eval q{
+				use Locale::gettext q{textdomain};
+				Locale::gettext->domain('ikiwiki')
+			};
+			if ($@) {
+				print STDERR "$@";
+				$gettext_obj=undef;
+				return shift;
+			}
+		}
+		return $gettext_obj->get(shift);
+	}
+	else {
+		return shift;
+	}
+} #}}}
+
+sub pagespec_merge ($$) { #{{{
+	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 ($) { #{{{
+	# This assumes that $page is in scope in the function
+	# that evalulates the translated pagespec code.
+	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*(\!|\(|\)|\w+\([^\)]+\)|[^\s()]+)\s*/ig) {
+		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).", \$from)";
+		}
+	}
+
+	return $code;
+} #}}}
+
+sub pagespec_match ($$;$) { #{{{
+	my $page=shift;
+	my $spec=shift;
+	my $from=shift;
+
+	return eval pagespec_translate($spec);
+} #}}}
+
+package IkiWiki::PageSpec;
+
+sub match_glob ($$$) { #{{{
+	my $page=shift;
+	my $glob=shift;
+	my $from=shift;
+	if (! defined $from){
+		$from = "";
+	}
+
+	# relative matching
+	if ($glob =~ m!^\./!) {
+		$from=~s!/?[^/]+$!!;
+		$glob=~s!^\./!!;
+		$glob="$from/$glob" if length $from;
+	}
+
+	# turn glob into safe regexp
+	$glob=quotemeta($glob);
+	$glob=~s/\\\*/.*/g;
+	$glob=~s/\\\?/./g;
+
+	return $page=~/^$glob$/i;
+} #}}}
+
+sub match_link ($$) { #{{{
+	my $page=shift;
+	my $link=lc(shift);
+
+	my $links = $IkiWiki::links{$page} or return undef;
+	foreach my $p (@$links) {
+		return 1 if lc $p eq $link;
+	}
+	return 0;
+} #}}}
+
+sub match_backlink ($$) { #{{{
+	match_link(pop, pop);
+} #}}}
+
+sub match_created_before ($$) { #{{{
+	my $page=shift;
+	my $testpage=shift;
+
+	if (exists $IkiWiki::pagectime{$testpage}) {
+		return $IkiWiki::pagectime{$page} < $IkiWiki::pagectime{$testpage};
+	}
+	else {
+		return 0;
+	}
+} #}}}
+
+sub match_created_after ($$) { #{{{
+	my $page=shift;
+	my $testpage=shift;
+
+	if (exists $IkiWiki::pagectime{$testpage}) {
+		return $IkiWiki::pagectime{$page} > $IkiWiki::pagectime{$testpage};
+	}
+	else {
+		return 0;
+	}
+} #}}}
+
+sub match_creation_day ($$) { #{{{
+	return ((gmtime($IkiWiki::pagectime{shift()}))[3] == shift);
+} #}}}
+
+sub match_creation_month ($$) { #{{{
+	return ((gmtime($IkiWiki::pagectime{shift()}))[4] + 1 == shift);
+} #}}}
+
+sub match_creation_year ($$) { #{{{
+	return ((gmtime($IkiWiki::pagectime{shift()}))[5] + 1900 == shift);
+} #}}}
+
 1