X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/bdbbca09c3a18510429934ffbad846ae64d7edce..c4b7d046690a7d35f5f6dc73fcbc83b72bc95f42:/IkiWiki.pm

diff --git a/IkiWiki.pm b/IkiWiki.pm
index 245eaafba..3430c5742 100644
--- a/IkiWiki.pm
+++ b/IkiWiki.pm
@@ -13,28 +13,34 @@ use open qw{:utf8 :std};
 
 use vars qw{%config %links %oldlinks %pagemtime %pagectime %pagecase
 	    %pagestate %wikistate %renderedfiles %oldrenderedfiles
-	    %pagesources %destsources %depends %hooks %forcerebuild
-	    $gettext_obj %loaded_plugins};
+	    %pagesources %destsources %depends %depends_simple %hooks
+	    %forcerebuild %loaded_plugins};
 
 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
+our @EXPORT = qw(hook debug error template htmlpage deptype
+                 add_depends pagespec_match pagespec_match_list bestlink
+		 htmllink readfile writefile pagetype srcfile pagename
+		 displaytime will_render gettext urlto targetpage
 		 add_underlay pagetitle titlepage linkpage newpagefile
-		 inject
+		 inject add_link
                  %config %links %pagestate %wikistate %renderedfiles
                  %pagesources %destsources);
-our $VERSION = 2.00; # plugin interface version, next is ikiwiki version
+our $VERSION = 3.00; # plugin interface version, next is ikiwiki version
 our $version='unknown'; # VERSION_AUTOREPLACE done by Makefile, DNE
-my $installdir=''; # INSTALLDIR_AUTOREPLACE done by Makefile, DNE
+our $installdir='/usr'; # INSTALLDIR_AUTOREPLACE done by Makefile, DNE
+
+# Page dependency types.
+our $DEPEND_CONTENT=1;
+our $DEPEND_PRESENCE=2;
+our $DEPEND_LINKS=4;
 
 # Optimisation.
 use Memoize;
 memoize("abs2rel");
 memoize("pagespec_translate");
-memoize("file_pruned");
+memoize("template_file");
 
-sub getsetup () { #{{{
+sub getsetup () {
 	wikiname => {
 		type => "string",
 		default => "wiki",
@@ -100,7 +106,7 @@ sub getsetup () { #{{{
 		type => "string",
 		default => '',
 		example => "/var/www/wiki/ikiwiki.cgi",
-		description => "cgi wrapper to generate",
+		description => "filename of cgi wrapper to generate",
 		safe => 0, # file
 		rebuild => 0,
 	},
@@ -120,7 +126,7 @@ sub getsetup () { #{{{
 	},
 	default_plugins => {
 		type => "internal",
-		default => [qw{mdwn link inline htmlscrubber passwordauth
+		default => [qw{mdwn link inline meta htmlscrubber passwordauth
 				openid signinedit lockedit conditional
 				recentchanges parentlinks editpage}],
 		description => "plugins to enable by default",
@@ -149,6 +155,13 @@ sub getsetup () { #{{{
 		safe => 0, # path
 		rebuild => 1,
 	},
+	templatedirs => {
+		type => "internal",
+		default => [],
+		description => "additional directories containing template files",
+		safe => 0,
+		rebuild => 0,
+	},
 	underlaydir => {
 		type => "string",
 		default => "$installdir/share/ikiwiki/basewiki",
@@ -157,6 +170,13 @@ sub getsetup () { #{{{
 		safe => 0, # path
 		rebuild => 0,
 	},
+	underlaydirbase => {
+		type => "internal",
+		default => "$installdir/share/ikiwiki",
+		description => "parent directory containing additional underlays",
+		safe => 0,
+		rebuild => 0,
+	},
 	wrappers => {
 		type => "internal",
 		default => [],
@@ -174,7 +194,7 @@ sub getsetup () { #{{{
 	verbose => {
 		type => "boolean",
 		example => 1,
-		description => "display verbose messages when building?",
+		description => "display verbose messages?",
 		safe => 1,
 		rebuild => 0,
 	},
@@ -194,7 +214,7 @@ sub getsetup () { #{{{
 	},
 	prefix_directives => {
 		type => "boolean",
-		default => 0,
+		default => 1,
 		description => "use '!'-prefixed preprocessor directives?",
 		safe => 0, # changing requires manual transition
 		rebuild => 1,
@@ -213,6 +233,13 @@ sub getsetup () { #{{{
 		safe => 1,
 		rebuild => 1,
 	},
+	discussionpage => {
+		type => "string",
+		default => gettext("Discussion"),
+		description => "name of Discussion pages",
+		safe => 1,
+		rebuild => 1,
+	},
 	sslcookie => {
 		type => "boolean",
 		default => 0,
@@ -277,13 +304,20 @@ sub getsetup () { #{{{
 	},
 	umask => {
 		type => "integer",
-		description => "",
 		example => "022",
 		description => "force ikiwiki to use a particular umask",
 		advanced => 1,
 		safe => 0, # paranoia
 		rebuild => 0,
 	},
+	wrappergroup => {
+		type => "string",
+		example => "ikiwiki",
+		description => "group for wrappers to run in",
+		advanced => 1,
+		safe => 0, # paranoia
+		rebuild => 0,
+	},
 	libdir => {
 		type => "string",
 		default => "",
@@ -314,8 +348,8 @@ sub getsetup () { #{{{
 		default => [qr/(^|\/)\.\.(\/|$)/, qr/^\./, qr/\/\./,
 			qr/\.x?html?$/, qr/\.ikiwiki-new$/,
 			qr/(^|\/).svn\//, qr/.arch-ids\//, qr/{arch}\//,
-			qr/(^|\/)_MTN\//,
-			qr/\.dpkg-tmp$/],
+			qr/(^|\/)_MTN\//, qr/(^|\/)_darcs\//,
+			qr/(^|\/)CVS\//, qr/\.dpkg-tmp$/],
 		description => "regexps of source files to ignore",
 		safe => 0,
 		rebuild => 1,
@@ -335,7 +369,7 @@ sub getsetup () { #{{{
 	},
 	web_commit_regexp => {
 		type => "internal",
-		default => qr/^web commit (by (.*?(?=: |$))|from (\d+\.\d+\.\d+\.\d+)):?(.*)/,
+		default => qr/^web commit (by (.*?(?=: |$))|from ([0-9a-fA-F:.]+[0-9a-fA-F])):?(.*)/,
 		description => "regexp to parse web commits from logs",
 		safe => 0,
 		rebuild => 0,
@@ -403,6 +437,13 @@ sub getsetup () { #{{{
 		safe => 0,
 		rebuild => 0,
 	},
+	wikistatedir => {
+		type => "internal",
+		default => undef,
+		description => "path to the .ikiwiki directory holding ikiwiki state",
+		safe => 0,
+		rebuild => 0,
+	},
 	setupfile => {
 		type => "internal",
 		default => undef,
@@ -411,15 +452,15 @@ sub getsetup () { #{{{
 		rebuild => 0,
 	},
 	allow_symlinks_before_srcdir => {
-		type => "string",
+		type => "boolean",
 		default => 0,
 		description => "allow symlinks in the path leading to the srcdir (potentially insecure)",
 		safe => 0,
 		rebuild => 0,
 	},
-} #}}}
+}
 
-sub defaultconfig () { #{{{
+sub defaultconfig () {
 	my %s=getsetup();
 	my @ret;
 	foreach my $key (keys %s) {
@@ -427,9 +468,9 @@ sub defaultconfig () { #{{{
 	}
 	use Data::Dumper;
 	return @ret;
-} #}}}
+}
 
-sub checkconfig () { #{{{
+sub checkconfig () {
 	# locale stuff; avoid LC_ALL since it overrides everything
 	if (defined $ENV{LC_ALL}) {
 		$ENV{LANG} = $ENV{LC_ALL};
@@ -438,7 +479,7 @@ sub checkconfig () { #{{{
 	if (defined $config{locale}) {
 		if (POSIX::setlocale(&POSIX::LC_ALL, $config{locale})) {
 			$ENV{LANG}=$config{locale};
-			$gettext_obj=undef;
+			define_gettext();
 		}
 	}
 		
@@ -467,7 +508,7 @@ sub checkconfig () { #{{{
 	}
 	
 	$config{wikistatedir}="$config{srcdir}/.ikiwiki"
-		unless exists $config{wikistatedir};
+		unless exists $config{wikistatedir} && defined $config{wikistatedir};
 
 	if (defined $config{umask}) {
 		umask(possibly_foolish_untaint($config{umask}));
@@ -476,9 +517,9 @@ sub checkconfig () { #{{{
 	run_hooks(checkconfig => sub { shift->() });
 
 	return 1;
-} #}}}
+}
 
-sub listplugins () { #{{{
+sub listplugins () {
 	my %ret;
 
 	foreach my $dir (@INC, $config{libdir}) {
@@ -496,9 +537,9 @@ sub listplugins () { #{{{
 	}
 
 	return keys %ret;
-} #}}}
+}
 
-sub loadplugins () { #{{{
+sub loadplugins () {
 	if (defined $config{libdir} && length $config{libdir}) {
 		unshift @INC, possibly_foolish_untaint($config{libdir});
 	}
@@ -508,26 +549,26 @@ sub loadplugins () { #{{{
 	}
 	
 	if ($config{rcs}) {
-		if (exists $IkiWiki::hooks{rcs}) {
+		if (exists $hooks{rcs}) {
 			error(gettext("cannot use multiple rcs plugins"));
 		}
 		loadplugin($config{rcs});
 	}
-	if (! exists $IkiWiki::hooks{rcs}) {
+	if (! exists $hooks{rcs}) {
 		loadplugin("norcs");
 	}
 
 	run_hooks(getopt => sub { shift->() });
 	if (grep /^-/, @ARGV) {
-		print STDERR "Unknown option: $_\n"
+		print STDERR "Unknown option (or missing parameter): $_\n"
 			foreach grep /^-/, @ARGV;
 		usage();
 	}
 
 	return 1;
-} #}}}
+}
 
-sub loadplugin ($) { #{{{
+sub loadplugin ($) {
 	my $plugin=shift;
 
 	return if grep { $_ eq $plugin} @{$config{disable_plugins}};
@@ -553,9 +594,9 @@ sub loadplugin ($) { #{{{
 	}
 	$loaded_plugins{$plugin}=1;
 	return 1;
-} #}}}
+}
 
-sub error ($;$) { #{{{
+sub error ($;$) {
 	my $message=shift;
 	my $cleaner=shift;
 	log_message('err' => $message) if $config{syslog};
@@ -563,15 +604,15 @@ sub error ($;$) { #{{{
 		$cleaner->();
 	}
 	die $message."\n";
-} #}}}
+}
 
-sub debug ($) { #{{{
+sub debug ($) {
 	return unless $config{verbose};
 	return log_message(debug => @_);
-} #}}}
+}
 
 my $log_open=0;
-sub log_message ($$) { #{{{
+sub log_message ($$) {
 	my $type=shift;
 
 	if ($config{syslog}) {
@@ -591,56 +632,71 @@ sub log_message ($$) { #{{{
 	else {
 		return print STDERR "@_\n";
 	}
-} #}}}
+}
 
-sub possibly_foolish_untaint ($) { #{{{
+sub possibly_foolish_untaint ($) {
 	my $tainted=shift;
 	my ($untainted)=$tainted=~/(.*)/s;
 	return $untainted;
-} #}}}
+}
 
-sub basename ($) { #{{{
+sub basename ($) {
 	my $file=shift;
 
 	$file=~s!.*/+!!;
 	return $file;
-} #}}}
+}
 
-sub dirname ($) { #{{{
+sub dirname ($) {
 	my $file=shift;
 
 	$file=~s!/*[^/]+$!!;
 	return $file;
-} #}}}
+}
 
-sub pagetype ($) { #{{{
+sub isinternal ($) {
 	my $page=shift;
+	return exists $pagesources{$page} &&
+		$pagesources{$page} =~ /\._([^.]+)$/;
+}
+
+sub pagetype ($) {
+	my $file=shift;
 	
-	if ($page =~ /\.([^.]+)$/) {
+	if ($file =~ /\.([^.]+)$/) {
 		return $1 if exists $hooks{htmlize}{$1};
 	}
+	my $base=basename($file);
+	if (exists $hooks{htmlize}{$base} &&
+	    $hooks{htmlize}{$base}{noextension}) {
+		return $base;
+	}
 	return;
-} #}}}
+}
 
-sub isinternal ($) { #{{{
-	my $page=shift;
-	return exists $pagesources{$page} &&
-		$pagesources{$page} =~ /\._([^.]+)$/;
-} #}}}
+my %pagename_cache;
 
-sub pagename ($) { #{{{
+sub pagename ($) {
 	my $file=shift;
 
+	if (exists $pagename_cache{$file}) {
+		return $pagename_cache{$file};
+	}
+
 	my $type=pagetype($file);
 	my $page=$file;
-	$page=~s/\Q.$type\E*$// if defined $type && !$hooks{htmlize}{$type}{keepextension};
+ 	$page=~s/\Q.$type\E*$//
+		if defined $type && !$hooks{htmlize}{$type}{keepextension}
+			&& !$hooks{htmlize}{$type}{noextension};
 	if ($config{indexpages} && $page=~/(.*)\/index$/) {
 		$page=$1;
 	}
+
+	$pagename_cache{$file} = $page;
 	return $page;
-} #}}}
+}
 
-sub newpagefile ($$) { #{{{
+sub newpagefile ($$) {
 	my $page=shift;
 	my $type=shift;
 
@@ -650,27 +706,31 @@ sub newpagefile ($$) { #{{{
 	else {
 		return $page."/index.".$type;
 	}
-} #}}}
+}
 
-sub targetpage ($$) { #{{{
+sub targetpage ($$;$) {
 	my $page=shift;
 	my $ext=shift;
+	my $filename=shift;
 	
-	if (! $config{usedirs} || $page eq 'index') {
+	if (defined $filename) {
+		return $page."/".$filename.".".$ext;
+	}
+	elsif (! $config{usedirs} || $page eq 'index') {
 		return $page.".".$ext;
 	}
 	else {
 		return $page."/index.".$ext;
 	}
-} #}}}
+}
 
-sub htmlpage ($) { #{{{
+sub htmlpage ($) {
 	my $page=shift;
 	
 	return targetpage($page, $config{htmlext});
-} #}}}
+}
 
-sub srcfile_stat { #{{{
+sub srcfile_stat {
 	my $file=shift;
 	my $nothrow=shift;
 
@@ -680,17 +740,17 @@ sub srcfile_stat { #{{{
 	}
 	error("internal error: $file cannot be found in $config{srcdir} or underlay") unless $nothrow;
 	return;
-} #}}}
+}
 
-sub srcfile ($;$) { #{{{
+sub srcfile ($;$) {
 	return (srcfile_stat(@_))[0];
-} #}}}
+}
 
-sub add_underlay ($) { #{{{
+sub add_underlay ($) {
 	my $dir=shift;
 
 	if ($dir !~ /^\//) {
-		$dir="$config{underlaydir}/../$dir";
+		$dir="$config{underlaydirbase}/$dir";
 	}
 
 	if (! grep { $_ eq $dir } @{$config{underlaydirs}}) {
@@ -698,9 +758,9 @@ sub add_underlay ($) { #{{{
 	}
 
 	return 1;
-} #}}}
+}
 
-sub readfile ($;$$) { #{{{
+sub readfile ($;$$) {
 	my $file=shift;
 	my $binary=shift;
 	my $wantfd=shift;
@@ -714,11 +774,15 @@ sub readfile ($;$$) { #{{{
 	binmode($in) if ($binary);
 	return \*$in if $wantfd;
 	my $ret=<$in>;
+	# check for invalid utf-8, and toss it back to avoid crashes
+	if (! utf8::valid($ret)) {
+		$ret=encode_utf8($ret);
+	}
 	close $in || error("failed to read $file: $!");
 	return $ret;
-} #}}}
+}
 
-sub prep_writefile ($$) { #{{{
+sub prep_writefile ($$) {
 	my $file=shift;
 	my $destdir=shift;
 	
@@ -742,9 +806,9 @@ sub prep_writefile ($$) { #{{{
 	}
 
 	return 1;
-} #}}}
+}
 
-sub writefile ($$$;$$) { #{{{
+sub writefile ($$$;$$) {
 	my $file=shift; # can include subdirs
 	my $destdir=shift; # directory to put file in
 	my $content=shift;
@@ -772,10 +836,10 @@ sub writefile ($$$;$$) { #{{{
 		error("failed renaming $newfile to $destdir/$file: $!", $cleanup);
 
 	return 1;
-} #}}}
+}
 
 my %cleared;
-sub will_render ($$;$) { #{{{
+sub will_render ($$;$) {
 	my $page=shift;
 	my $dest=shift;
 	my $clear=shift;
@@ -799,9 +863,9 @@ sub will_render ($$;$) { #{{{
 	$destsources{$dest}=$page;
 
 	return 1;
-} #}}}
+}
 
-sub bestlink ($$) { #{{{
+sub bestlink ($$) {
 	my $page=shift;
 	my $link=shift;
 	
@@ -817,7 +881,7 @@ sub bestlink ($$) { #{{{
 		$l.="/" if length $l;
 		$l.=$link;
 
-		if (exists $links{$l}) {
+		if (exists $pagesources{$l}) {
 			return $l;
 		}
 		elsif (exists $pagecase{lc $l}) {
@@ -827,7 +891,7 @@ sub bestlink ($$) { #{{{
 
 	if (length $config{userdir}) {
 		my $l = "$config{userdir}/".lc($link);
-		if (exists $links{$l}) {
+		if (exists $pagesources{$l}) {
 			return $l;
 		}
 		elsif (exists $pagecase{lc $l}) {
@@ -837,15 +901,15 @@ sub bestlink ($$) { #{{{
 
 	#print STDERR "warning: page $page, broken link: $link\n";
 	return "";
-} #}}}
+}
 
-sub isinlinableimage ($) { #{{{
+sub isinlinableimage ($) {
 	my $file=shift;
 	
 	return $file =~ /\.(png|gif|jpg|jpeg)$/i;
-} #}}}
+}
 
-sub pagetitle ($;$) { #{{{
+sub pagetitle ($;$) {
 	my $page=shift;
 	my $unescaped=shift;
 
@@ -857,31 +921,31 @@ sub pagetitle ($;$) { #{{{
 	}
 
 	return $page;
-} #}}}
+}
 
-sub titlepage ($) { #{{{
+sub titlepage ($) {
 	my $title=shift;
 	# support use w/o %config set
 	my $chars = defined $config{wiki_file_chars} ? $config{wiki_file_chars} : "-[:alnum:]+/.:_";
 	$title=~s/([^$chars]|_)/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
 	return $title;
-} #}}}
+}
 
-sub linkpage ($) { #{{{
+sub linkpage ($) {
 	my $link=shift;
 	my $chars = defined $config{wiki_file_chars} ? $config{wiki_file_chars} : "-[:alnum:]+/.:_";
 	$link=~s/([^$chars])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
 	return $link;
-} #}}}
+}
 
-sub cgiurl (@) { #{{{
+sub cgiurl (@) {
 	my %params=@_;
 
 	return $config{cgiurl}."?".
 		join("&amp;", map $_."=".uri_escape_utf8($params{$_}), keys %params);
-} #}}}
+}
 
-sub baseurl (;$) { #{{{
+sub baseurl (;$) {
 	my $page=shift;
 
 	return "$config{url}/" if ! defined $page;
@@ -890,9 +954,9 @@ sub baseurl (;$) { #{{{
 	$page=~s/[^\/]+$//;
 	$page=~s/[^\/]+\//..\//g;
 	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! (Debian bug #376658; fixed in debian unstable now)
@@ -903,15 +967,15 @@ sub abs2rel ($$) { #{{{
 	my $ret=File::Spec->abs2rel($path, $base);
 	$ret=~s/^// if defined $ret;
 	return $ret;
-} #}}}
+}
 
-sub displaytime ($;$) { #{{{
+sub displaytime ($;$) {
 	# Plugins can override this function to mark up the time to
 	# display.
 	return '<span class="date">'.formattime(@_).'</span>';
-} #}}}
+}
 
-sub formattime ($;$) { #{{{
+sub formattime ($;$) {
 	# Plugins can override this function to format the time.
 	my $time=shift;
 	my $format=shift;
@@ -922,25 +986,25 @@ sub formattime ($;$) { #{{{
 	# strftime doesn't know about encodings, so make sure
 	# its output is properly treated as utf8
 	return decode_utf8(POSIX::strftime($format, localtime($time)));
-} #}}}
+}
 
-sub beautify_urlpath ($) { #{{{
+sub beautify_urlpath ($) {
 	my $url=shift;
 
-	if ($config{usedirs}) {
-		$url =~ s!/index.$config{htmlext}$!/!;
+	# Ensure url is not an empty link, and if necessary,
+	# add ./ to avoid colon confusion.
+	if ($url !~ /^\// && $url !~ /^\.\.?\//) {
+		$url="./$url";
 	}
 
-	# Ensure url is not an empty link, and
-	# if it's relative, make that explicit to avoid colon confusion.
-	if ($url !~ /^\//) {
-		$url="./$url";
+	if ($config{usedirs}) {
+		$url =~ s!/index.$config{htmlext}$!/!;
 	}
 
 	return $url;
-} #}}}
+}
 
-sub urlto ($$;$) { #{{{
+sub urlto ($$;$) {
 	my $to=shift;
 	my $from=shift;
 	my $absolute=shift;
@@ -960,9 +1024,9 @@ sub urlto ($$;$) { #{{{
 	my $link = abs2rel($to, dirname(htmlpage($from)));
 
 	return beautify_urlpath($link);
-} #}}}
+}
 
-sub htmllink ($$$;@) { #{{{
+sub htmllink ($$$;@) {
 	my $lpage=shift; # the page doing the linking
 	my $page=shift; # the page that will contain the link (different for inline)
 	my $link=shift;
@@ -1017,17 +1081,51 @@ sub htmllink ($$$;@) { #{{{
 	}
 
 	my @attrs;
-	if (defined $opts{rel}) {
-		push @attrs, ' rel="'.$opts{rel}.'"';
-	}
-	if (defined $opts{class}) {
-		push @attrs, ' class="'.$opts{class}.'"';
+	foreach my $attr (qw{rel class title}) {
+		if (defined $opts{$attr}) {
+			push @attrs, " $attr=\"$opts{$attr}\"";
+		}
 	}
 
 	return "<a href=\"$bestlink\"@attrs>$linktext</a>";
-} #}}}
+}
+
+sub openiduser ($) {
+	my $user=shift;
+
+	if ($user =~ m!^https?://! &&
+	    eval q{use Net::OpenID::VerifiedIdentity; 1} && !$@) {
+		my $display;
+
+		if (Net::OpenID::VerifiedIdentity->can("DisplayOfURL")) {
+			# this works in at least 2.x
+			$display = Net::OpenID::VerifiedIdentity::DisplayOfURL($user);
+		}
+		else {
+			# this only works in 1.x
+			my $oid=Net::OpenID::VerifiedIdentity->new(identity => $user);
+			$display=$oid->display;
+		}
+
+		# Convert "user.somehost.com" to "user [somehost.com]"
+		# (also "user.somehost.co.uk")
+		if ($display !~ /\[/) {
+			$display=~s/^([-a-zA-Z0-9]+?)\.([-.a-zA-Z0-9]+\.[a-z]+)$/$1 [$2]/;
+		}
+		# Convert "http://somehost.com/user" to "user [somehost.com]".
+		# (also "https://somehost.com/user/")
+		if ($display !~ /\[/) {
+			$display=~s/^https?:\/\/(.+)\/([^\/]+)\/?$/$2 [$1]/;
+		}
+		$display=~s!^https?://!!; # make sure this is removed
+		eval q{use CGI 'escapeHTML'};
+		error($@) if $@;
+		return escapeHTML($display);
+	}
+	return;
+}
 
-sub userlink ($) { #{{{
+sub userlink ($) {
 	my $user=shift;
 
 	my $oiduser=eval { openiduser($user) };
@@ -1042,9 +1140,9 @@ sub userlink ($) { #{{{
 			length $config{userdir} ? $config{userdir}."/".$user : $user
 		), noimageinline => 1);
 	}
-} #}}}
+}
 
-sub htmlize ($$$$) { #{{{
+sub htmlize ($$$$) {
 	my $page=shift;
 	my $destpage=shift;
 	my $type=shift;
@@ -1079,9 +1177,9 @@ sub htmlize ($$$$) { #{{{
 	}
 
 	return $content;
-} #}}}
+}
 
-sub linkify ($$$) { #{{{
+sub linkify ($$$) {
 	my $page=shift;
 	my $destpage=shift;
 	my $content=shift;
@@ -1095,11 +1193,11 @@ sub linkify ($$$) { #{{{
 	});
 	
 	return $content;
-} #}}}
+}
 
 our %preprocessing;
 our $preprocess_preview=0;
-sub preprocess ($$$;$$) { #{{{
+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;
@@ -1177,9 +1275,10 @@ sub preprocess ($$$;$$) { #{{{
 					);
 				};
 				if ($@) {
-					chomp $@;
+					my $error=$@;
+					chomp $error;
 				 	$ret="[[!$command <span class=\"error\">".
-						gettext("Error").": $@"."</span>]]";
+						gettext("Error").": $error"."</span>]]";
 				}
 			}
 			else {
@@ -1217,7 +1316,7 @@ sub preprocess ($$$;$$) { #{{{
 						|
 						"[^"]+"		# single-quoted value
 						|
-						[^\s\]]+	# unquoted value
+						[^"\s\]]+	# unquoted value
 					)
 					\s*			# whitespace or end
 								# of directive
@@ -1240,7 +1339,7 @@ sub preprocess ($$$;$$) { #{{{
 						|
 						"[^"]+"		# single-quoted value
 						|
-						[^\s\]]+	# unquoted value
+						[^"\s\]]+	# unquoted value
 					)
 					\s*			# whitespace or end
 								# of directive
@@ -1252,9 +1351,9 @@ sub preprocess ($$$;$$) { #{{{
 
 	$content =~ s{$regex}{$handle->($1, $2, $3, $4)}eg;
 	return $content;
-} #}}}
+}
 
-sub filter ($$$) { #{{{
+sub filter ($$$) {
 	my $page=shift;
 	my $destpage=shift;
 	my $content=shift;
@@ -1265,16 +1364,79 @@ sub filter ($$$) { #{{{
 	});
 
 	return $content;
-} #}}}
+}
 
-sub indexlink () { #{{{
+sub indexlink () {
 	return "<a href=\"$config{url}\">$config{wikiname}</a>";
-} #}}}
+}
+
+sub check_canedit ($$$;$) {
+	my $page=shift;
+	my $q=shift;
+	my $session=shift;
+	my $nonfatal=shift;
+	
+	my $canedit;
+	run_hooks(canedit => sub {
+		return if defined $canedit;
+		my $ret=shift->($page, $q, $session);
+		if (defined $ret) {
+			if ($ret eq "") {
+				$canedit=1;
+			}
+			elsif (ref $ret eq 'CODE') {
+				$ret->() unless $nonfatal;
+				$canedit=0;
+			}
+			elsif (defined $ret) {
+				error($ret) unless $nonfatal;
+				$canedit=0;
+			}
+		}
+	});
+	return defined $canedit ? $canedit : 1;
+}
+
+sub check_content (@) {
+	my %params=@_;
+	
+	return 1 if ! exists $hooks{checkcontent}; # optimisation
+
+	if (exists $pagesources{$params{page}}) {
+		my @diff;
+		my %old=map { $_ => 1 }
+		        split("\n", readfile(srcfile($pagesources{$params{page}})));
+		foreach my $line (split("\n", $params{content})) {
+			push @diff, $line if ! exists $old{$_};
+		}
+		$params{diff}=join("\n", @diff);
+	}
+
+	my $ok;
+	run_hooks(checkcontent => sub {
+		return if defined $ok;
+		my $ret=shift->(%params);
+		if (defined $ret) {
+			if ($ret eq "") {
+				$ok=1;
+			}
+			elsif (ref $ret eq 'CODE') {
+				$ret->() unless $params{nonfatal};
+				$ok=0;
+			}
+			elsif (defined $ret) {
+				error($ret) unless $params{nonfatal};
+				$ok=0;
+			}
+		}
+
+	});
+	return defined $ok ? $ok : 1;
+}
 
 my $wikilock;
 
-sub lockwiki (;$) { #{{{
-	my $wait=@_ ? shift : 1;
+sub lockwiki () {
 	# Take an exclusive lock on the wiki to prevent multiple concurrent
 	# run issues. The lock will be dropped on program exit.
 	if (! -d $config{wikistatedir}) {
@@ -1282,32 +1444,21 @@ sub lockwiki (;$) { #{{{
 	}
 	open($wikilock, '>', "$config{wikistatedir}/lockfile") ||
 		error ("cannot write to $config{wikistatedir}/lockfile: $!");
-	if (! flock($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 $wait seconds without lock being freed (possible stuck process or stale lock?)");
-		}
-		else {
-			return 0;
-		}
+	if (! flock($wikilock, 2)) { # LOCK_EX
+		error("failed to get lock");
 	}
 	return 1;
-} #}}}
+}
 
-sub unlockwiki () { #{{{
+sub unlockwiki () {
+	POSIX::close($ENV{IKIWIKI_CGILOCK_FD}) if exists $ENV{IKIWIKI_CGILOCK_FD};
 	return close($wikilock) if $wikilock;
 	return;
-} #}}}
+}
 
 my $commitlock;
 
-sub commit_hook_enabled () { #{{{
+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
@@ -1316,27 +1467,28 @@ sub commit_hook_enabled () { #{{{
 	}
 	close($commitlock) || error("failed closing commitlock: $!");
 	return 1;
-} #}}}
+}
 
-sub disable_commit_hook () { #{{{
+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 () { #{{{
+sub enable_commit_hook () {
 	return close($commitlock) if $commitlock;
 	return;
-} #}}}
+}
 
-sub loadindex () { #{{{
+sub loadindex () {
 	%oldrenderedfiles=%pagectime=();
 	if (! $config{rebuild}) {
 		%pagesources=%pagemtime=%oldlinks=%links=%depends=
-		%destsources=%renderedfiles=%pagecase=%pagestate=();
+		%destsources=%renderedfiles=%pagecase=%pagestate=
+		%depends_simple=();
 	}
 	my $in;
 	if (! open ($in, "<", "$config{wikistatedir}/indexdb")) {
@@ -1376,7 +1528,27 @@ sub loadindex () { #{{{
 				$links{$page}=$d->{links};
 				$oldlinks{$page}=[@{$d->{links}}];
 			}
-			if (exists $d->{depends}) {
+			if (ref $d->{depends_simple} eq 'ARRAY') {
+				# old format
+				$depends_simple{$page}={
+					map { $_ => 1 } @{$d->{depends_simple}}
+				};
+			}
+			elsif (exists $d->{depends_simple}) {
+				$depends_simple{$page}=$d->{depends_simple};
+			}
+			if (exists $d->{dependslist}) {
+				# old format
+				$depends{$page}={
+					map { $_ => $DEPEND_CONTENT }
+						@{$d->{dependslist}}
+				};
+			}
+			elsif (exists $d->{depends} && ! ref $d->{depends}) {
+				# old format
+				$depends{$page}={$d->{depends} => $DEPEND_CONTENT };
+			}
+			elsif (exists $d->{depends}) {
 				$depends{$page}=$d->{depends};
 			}
 			if (exists $d->{state}) {
@@ -1392,9 +1564,9 @@ sub loadindex () { #{{{
 		$destsources{$_}=$page foreach @{$renderedfiles{$page}};
 	}
 	return close($in);
-} #}}}
+}
 
-sub saveindex () { #{{{
+sub saveindex () {
 	run_hooks(savestate => sub { shift->() });
 
 	my %hookids;
@@ -1426,6 +1598,10 @@ sub saveindex () { #{{{
 			$index{page}{$src}{depends} = $depends{$page};
 		}
 
+		if (exists $depends_simple{$page}) {
+			$index{page}{$src}{depends_simple} = $depends_simple{$page};
+		}
+
 		if (exists $pagestate{$page}) {
 			foreach my $id (@hookids) {
 				foreach my $key (keys %{$pagestate{$page}{$id}}) {
@@ -1450,18 +1626,19 @@ sub saveindex () { #{{{
 		error("failed renaming $newfile to $config{wikistatedir}/indexdb", $cleanup);
 	
 	return 1;
-} #}}}
+}
 
-sub template_file ($) { #{{{
+sub template_file ($) {
 	my $template=shift;
 
-	foreach my $dir ($config{templatedir}, "$installdir/share/ikiwiki/templates") {
+	foreach my $dir ($config{templatedir}, @{$config{templatedirs}},
+	                 "$installdir/share/ikiwiki/templates") {
 		return "$dir/$template" if -e "$dir/$template";
 	}
 	return;
-} #}}}
+}
 
-sub template_params (@) { #{{{
+sub template_params (@) {
 	my $filename=template_file(shift);
 
 	if (! defined $filename) {
@@ -1480,14 +1657,14 @@ sub template_params (@) { #{{{
 		@_
 	);
 	return wantarray ? @ret : {@ret};
-} #}}}
+}
 
-sub template ($;@) { #{{{
+sub template ($;@) {
 	require HTML::Template;
 	return HTML::Template->new(template_params(@_));
-} #}}}
+}
 
-sub misctemplate ($$;@) { #{{{
+sub misctemplate ($$;@) {
 	my $title=shift;
 	my $pagebody=shift;
 	
@@ -1504,9 +1681,9 @@ sub misctemplate ($$;@) { #{{{
 		shift->(page => "", destpage => "", template => $template);
 	});
 	return $template->output;
-}#}}}
+}
 
-sub hook (@) { # {{{
+sub hook (@) {
 	my %param=@_;
 	
 	if (! exists $param{type} || ! ref $param{call} || ! exists $param{id}) {
@@ -1517,168 +1694,175 @@ sub hook (@) { # {{{
 	
 	$hooks{$param{type}}{$param{id}}=\%param;
 	return 1;
-} # }}}
+}
 
-sub run_hooks ($$) { # {{{
+sub run_hooks ($$) {
 	# 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;
+		my (@first, @middle, @last);
 		foreach my $id (keys %{$hooks{$type}}) {
-			if ($hooks{$type}{$id}{last}) {
-				push @deferred, $id;
-				next;
+			if ($hooks{$type}{$id}{first}) {
+				push @first, $id;
+			}
+			elsif ($hooks{$type}{$id}{last}) {
+				push @last, $id;
+			}
+			else {
+				push @middle, $id;
 			}
-			$sub->($hooks{$type}{$id}{call});
 		}
-		foreach my $id (@deferred) {
+		foreach my $id (@first, @middle, @last) {
 			$sub->($hooks{$type}{$id}{call});
 		}
 	}
 
 	return 1;
-} #}}}
+}
 
-sub rcs_update () { #{{{
+sub rcs_update () {
 	$hooks{rcs}{rcs_update}{call}->(@_);
-} #}}}
+}
 
-sub rcs_prepedit ($) { #{{{
+sub rcs_prepedit ($) {
 	$hooks{rcs}{rcs_prepedit}{call}->(@_);
-} #}}}
+}
 
-sub rcs_commit ($$$;$$) { #{{{
+sub rcs_commit ($$$;$$) {
 	$hooks{rcs}{rcs_commit}{call}->(@_);
-} #}}}
+}
 
-sub rcs_commit_staged ($$$) { #{{{
+sub rcs_commit_staged ($$$) {
 	$hooks{rcs}{rcs_commit_staged}{call}->(@_);
-} #}}}
+}
 
-sub rcs_add ($) { #{{{
+sub rcs_add ($) {
 	$hooks{rcs}{rcs_add}{call}->(@_);
-} #}}}
+}
 
-sub rcs_remove ($) { #{{{
+sub rcs_remove ($) {
 	$hooks{rcs}{rcs_remove}{call}->(@_);
-} #}}}
+}
 
-sub rcs_rename ($$) { #{{{
+sub rcs_rename ($$) {
 	$hooks{rcs}{rcs_rename}{call}->(@_);
-} #}}}
+}
 
-sub rcs_recentchanges ($) { #{{{
+sub rcs_recentchanges ($) {
 	$hooks{rcs}{rcs_recentchanges}{call}->(@_);
-} #}}}
+}
 
-sub rcs_diff ($) { #{{{
+sub rcs_diff ($) {
 	$hooks{rcs}{rcs_diff}{call}->(@_);
-} #}}}
+}
 
-sub rcs_getctime ($) { #{{{
+sub rcs_getctime ($) {
 	$hooks{rcs}{rcs_getctime}{call}->(@_);
-} #}}}
-
-sub rcs_test_receive ($) { #{{{
-	$hooks{rcs}{rcs_test_receive}{call}->(@_);
-} #}}}
+}
 
-sub globlist_to_pagespec ($) { #{{{
-	my @globlist=split(' ', shift);
+sub rcs_receive () {
+	$hooks{rcs}{rcs_receive}{call}->();
+}
 
-	my (@spec, @skip);
-	foreach my $glob (@globlist) {
-		if ($glob=~/^!(.*)/) {
-			push @skip, $glob;
-		}
-		else {
-			push @spec, $glob;
+sub add_depends ($$;$) {
+	my $page=shift;
+	my $pagespec=shift;
+	my $deptype=shift || $DEPEND_CONTENT;
+
+	# Is the pagespec a simple page name?
+	if ($pagespec =~ /$config{wiki_file_regexp}/ &&
+	    $pagespec !~ /[\s*?()!]/) {
+		$depends_simple{$page}{lc $pagespec} |= $deptype;
+		return 1;
+	}
+
+	# Add explicit dependencies for influences.
+	my $sub=pagespec_translate($pagespec);
+	return if $@;
+	foreach my $p (keys %pagesources) {
+		my $r=$sub->($p, location => $page);
+		my $i=$r->influences;
+		foreach my $k (keys %$i) {
+			$depends_simple{$page}{lc $k} |= $i->{$k};
 		}
+		last if $r->influences_static;
 	}
 
-	my $spec=join(' or ', @spec);
-	if (@skip) {
-		my $skip=join(' and ', @skip);
-		if (length $spec) {
-			$spec="$skip and ($spec)";
+	$depends{$page}{$pagespec} |= $deptype;
+	return 1;
+}
+
+sub deptype (@) {
+	my $deptype=0;
+	foreach my $type (@_) {
+		if ($type eq 'presence') {
+			$deptype |= $DEPEND_PRESENCE;
 		}
-		else {
-			$spec=$skip;
+		elsif ($type eq 'links') { 
+			$deptype |= $DEPEND_LINKS;
+		}
+		elsif ($type eq 'content') {
+			$deptype |= $DEPEND_CONTENT;
 		}
 	}
-	return $spec;
-} #}}}
-
-sub is_globlist ($) { #{{{
-	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 $pagespec=shift;
-	
-	return unless pagespec_valid($pagespec);
+	return $deptype;
+}
 
-	if (! exists $depends{$page}) {
-		$depends{$page}=$pagespec;
-	}
-	else {
-		$depends{$page}=pagespec_merge($depends{$page}, $pagespec);
+sub file_pruned ($;$) {
+	my $file=shift;
+	if (@_) {
+		require File::Spec;
+		$file=File::Spec->canonpath($file);
+		my $base=File::Spec->canonpath(shift);
+		return if $file eq $base;
+		$file =~ s#^\Q$base\E/+##;
 	}
 
-	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;
-} #}}}
+	return $file =~ m/$regexp/;
+}
 
-sub gettext { #{{{
-	# Only use gettext in the rare cases it's needed.
+sub define_gettext () {
+	# If translation is needed, redefine the gettext function to do it.
+	# Otherwise, it becomes a quick no-op.
+	no warnings 'redefine';
 	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{
+	    	*gettext=sub {
+			my $gettext_obj=eval q{
 				use Locale::gettext q{textdomain};
 				Locale::gettext->domain('ikiwiki')
 			};
-			if ($@) {
-				print STDERR "$@";
-				$gettext_obj=undef;
+
+			if ($gettext_obj) {
+				$gettext_obj->get(shift);
+			}
+			else {
 				return shift;
 			}
-		}
-		return $gettext_obj->get(shift);
+		};
 	}
 	else {
-		return shift;
+		*gettext=sub { return shift };
 	}
-} #}}}
+}
 
-sub yesno ($) { #{{{
+sub gettext {
+	define_gettext();
+	gettext(@_);
+}
+
+sub yesno ($) {
 	my $val=shift;
 
-	return (defined $val && lc($val) eq gettext("yes"));
-} #}}}
+	return (defined $val && (lc($val) eq gettext("yes") || lc($val) eq "yes" || $val eq "1"));
+}
 
-sub inject { #{{{
+sub inject {
 	# Injects a new function into the symbol table to replace an
 	# exported function.
 	my %params=@_;
@@ -1701,35 +1885,22 @@ sub inject { #{{{
 	}
 	use strict;
 	use warnings;
-} #}}}
-
-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);
-        }
+sub add_link ($$) {
+	my $page=shift;
+	my $link=shift;
 
-	return "($a) or ($b)";
-} #}}}
+	push @{$links{$page}}, $link
+		unless grep { $_ eq $link } @{$links{$page}};
+}
 
-sub pagespec_translate ($) { #{{{
+sub pagespec_translate ($) {
 	my $spec=shift;
 
-	# Support for old-style GlobLists.
-	if (is_globlist($spec)) {
-		$spec=globlist_to_pagespec($spec);
-	}
-
 	# Convert spec to perl code.
 	my $code="";
+	my @data;
 	while ($spec=~m{
 		\s*		# ignore whitespace
 		(		# 1: match a single word
@@ -1744,39 +1915,42 @@ sub pagespec_translate ($) { #{{{
 			[^\s()]+	# any other text
 		)
 		\s*		# ignore whitespace
-	}igx) {
+	}gx) {
 		my $word=$1;
 		if (lc $word eq 'and') {
-			$code.=' &&';
+			$code.=' &';
 		}
 		elsif (lc $word eq 'or') {
-			$code.=' ||';
+			$code.=' |';
 		}
 		elsif ($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).", \@_)";
+				push @data, $2;
+				$code.="IkiWiki::PageSpec::match_$1(\$page, \$data[$#data], \@_)";
 			}
 			else {
-				$code.=' 0';
+				push @data, qq{unknown function in pagespec "$word"};
+				$code.="IkiWiki::ErrorReason->new(\$data[$#data])";
 			}
 		}
 		else {
-			$code.=" IkiWiki::PageSpec::match_glob(\$page, ".safequote($word).", \@_)";
+			push @data, $word;
+			$code.=" IkiWiki::PageSpec::match_glob(\$page, \$data[$#data], \@_)";
 		}
 	}
 
 	if (! length $code) {
-		$code=0;
+		$code="IkiWiki::FailReason->new('empty pagespec')";
 	}
 
 	no warnings;
 	return eval 'sub { my $page=shift; '.$code.' }';
-} #}}}
+}
 
-sub pagespec_match ($$;@) { #{{{
+sub pagespec_match ($$;@) {
 	my $page=shift;
 	my $spec=shift;
 	my @params=@_;
@@ -1787,69 +1961,193 @@ sub pagespec_match ($$;@) { #{{{
 	}
 
 	my $sub=pagespec_translate($spec);
-	return IkiWiki::FailReason->new("syntax error in pagespec \"$spec\"") if $@;
+	return IkiWiki::ErrorReason->new("syntax error in pagespec \"$spec\"")
+		if $@ || ! defined $sub;
 	return $sub->($page, @params);
-} #}}}
+}
+
+sub pagespec_match_list ($$;@) {
+	my $page=shift;
+	my $pagespec=shift;
+	my %params=@_;
+
+	# Backwards compatability with old calling convention.
+	if (ref $page) {
+		print STDERR "warning: a plugin (".caller().") is using pagespec_match_list in an obsolete way, and needs to be updated\n";
+		$params{list}=$page;
+		$page=$params{location}; # ugh!
+	}
 
-sub pagespec_valid ($) { #{{{
+	my $sub=pagespec_translate($pagespec);
+	error "syntax error in pagespec \"$pagespec\""
+		if $@ || ! defined $sub;
+
+	my @candidates;
+	if (exists $params{list}) {
+		@candidates=exists $params{filter}
+			? grep { ! $params{filter}->($_) } @{$params{list}}
+			: @{$params{list}};
+	}
+	else {
+		@candidates=exists $params{filter}
+			? grep { ! $params{filter}->($_) } keys %pagesources
+			: keys %pagesources;
+	}
+
+	if (defined $params{sort}) {
+		my $f;
+		if ($params{sort} eq 'title') {
+			$f=sub { pagetitle(basename($a)) cmp pagetitle(basename($b)) };
+		}
+		elsif ($params{sort} eq 'title_natural') {
+			eval q{use Sort::Naturally};
+			if ($@) {
+				error(gettext("Sort::Naturally needed for title_natural sort"));
+			}
+			$f=sub { Sort::Naturally::ncmp(pagetitle(basename($a)), pagetitle(basename($b))) };
+                }
+		elsif ($params{sort} eq 'mtime') {
+			$f=sub { $pagemtime{$b} <=> $pagemtime{$a} };
+		}
+		elsif ($params{sort} eq 'age') {
+			$f=sub { $pagectime{$b} <=> $pagectime{$a} };
+		}
+		else {
+			error sprintf(gettext("unknown sort type %s"), $params{sort});
+		}
+		@candidates = sort { &$f } @candidates;
+	}
+
+	@candidates=reverse(@candidates) if $params{reverse};
+	
+	$depends{$page}{$pagespec} |= ($params{deptype} || $DEPEND_CONTENT);
+	
+	# clear params, remainder is passed to pagespec
+	my $num=$params{num};
+	delete @params{qw{num deptype reverse sort filter list}};
+	
+	my @matches;
+	my $firstfail;
+	my $count=0;
+	my $accum=IkiWiki::SuccessReason->new();
+	foreach my $p (@candidates) {
+		my $r=$sub->($p, %params, location => $page);
+		error(sprintf(gettext("cannot match pages: %s"), $r))
+			if $r->isa("IkiWiki::ErrorReason");
+		$accum |= $r;
+		if ($r) {
+			push @matches, $p;
+			last if defined $num && ++$count == $num;
+		}
+	}
+
+	# Add simple dependencies for accumulated influences.
+	my $i=$accum->influences;
+	foreach my $k (keys %$i) {
+		$depends_simple{$page}{lc $k} |= $i->{$k};
+	}
+
+	return @matches;
+}
+
+sub pagespec_valid ($) {
 	my $spec=shift;
 
 	my $sub=pagespec_translate($spec);
 	return ! $@;
-} #}}}
+}
 
-sub glob2re ($) { #{{{
+sub glob2re ($) {
 	my $re=quotemeta(shift);
 	$re=~s/\\\*/.*/g;
 	$re=~s/\\\?/./g;
 	return $re;
-} #}}}
+}
 
 package IkiWiki::FailReason;
 
-use overload ( #{{{
-	'""'	=> sub { ${$_[0]} },
+use overload (
+	'""'	=> sub { $_[0][0] },
 	'0+'	=> sub { 0 },
 	'!'	=> sub { bless $_[0], 'IkiWiki::SuccessReason'},
+	'&'	=> sub { $_[0]->merge_influences($_[1], 1); $_[0] },
+	'|'	=> sub { $_[1]->merge_influences($_[0]); $_[1] },
 	fallback => 1,
-); #}}}
+);
 
-sub new { #{{{
-	my $class = shift;
-	my $value = shift;
-	return bless \$value, $class;
-} #}}}
+our @ISA = 'IkiWiki::SuccessReason';
 
 package IkiWiki::SuccessReason;
 
-use overload ( #{{{
-	'""'	=> sub { ${$_[0]} },
+use overload (
+	'""'	=> sub { $_[0][0] },
 	'0+'	=> sub { 1 },
 	'!'	=> sub { bless $_[0], 'IkiWiki::FailReason'},
+	'&'	=> sub { $_[1]->merge_influences($_[0], 1); $_[1] },
+	'|'	=> sub { $_[0]->merge_influences($_[1]); $_[0] },
 	fallback => 1,
-); #}}}
+);
 
-sub new { #{{{
+sub new {
 	my $class = shift;
 	my $value = shift;
-	return bless \$value, $class;
-}; #}}}
+	return bless [$value, {@_}], $class;
+}
+
+sub influences {
+	my $this=shift;
+	$this->[1]={@_} if @_;
+	my %i=%{$this->[1]};
+	delete $i{""};
+	return \%i;
+}
+
+sub influences_static {
+	return ! $_[0][1]->{""};
+}
+
+sub merge_influences {
+	my $this=shift;
+	my $other=shift;
+	my $anded=shift;
+
+	if (! $anded || (($this || %{$this->[1]}) &&
+	                ($other || %{$other->[1]}))) {
+		foreach my $influence (keys %{$other->[1]}) {
+			$this->[1]{$influence} |= $other->[1]{$influence};
+		}
+	}
+	else {
+		# influence blocker
+		$this->[1]={};
+	}
+}
+
+package IkiWiki::ErrorReason;
+
+our @ISA = 'IkiWiki::FailReason';
 
 package IkiWiki::PageSpec;
 
-sub match_glob ($$;@) { #{{{
+sub derel ($$) {
+	my $path=shift;
+	my $from=shift;
+
+	if ($path =~ m!^\./!) {
+		$from=~s#/?[^/]+$## if defined $from;
+		$path=~s#^\./##;
+		$path="$from/$path" if length $from;
+	}
+
+	return $path;
+}
+
+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;
-	}
+	$glob=derel($glob, $params{location});
 
 	my $regexp=IkiWiki::glob2re($glob);
 	if ($page=~/^$regexp$/i) {
@@ -1863,114 +2161,121 @@ sub match_glob ($$;@) { #{{{
 	else {
 		return IkiWiki::FailReason->new("$glob does not match $page");
 	}
-} #}}}
+}
 
-sub match_internal ($$;@) { #{{{
+sub match_internal ($$;@) {
 	return match_glob($_[0], $_[1], @_, internal => 1)
-} #}}}
+}
 
-sub match_link ($$;@) { #{{{
+sub match_link ($$;@) {
 	my $page=shift;
 	my $link=lc(shift);
 	my %params=@_;
 
+	$link=derel($link, $params{location});
 	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};
+	return IkiWiki::FailReason->new("$page has no links", "" => 1)
+		unless $links && @{$links};
 	my $bestlink = IkiWiki::bestlink($from, $link);
 	foreach my $p (@{$links}) {
 		if (length $bestlink) {
-			return IkiWiki::SuccessReason->new("$page links to $link")
+			return IkiWiki::SuccessReason->new("$page links to $link", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
 				if $bestlink eq IkiWiki::bestlink($page, $p);
 		}
 		else {
-			return IkiWiki::SuccessReason->new("$page links to page $p matching $link")
+			return IkiWiki::SuccessReason->new("$page links to page $p matching $link", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
 				if match_glob($p, $link, %params);
+			my ($p_rel)=$p=~/^\/?(.*)/;
+			$link=~s/^\///;
+			return IkiWiki::SuccessReason->new("$page links to page $p_rel matching $link", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
+				if match_glob($p_rel, $link, %params);
 		}
 	}
-	return IkiWiki::FailReason->new("$page does not link to $link");
-} #}}}
+	return IkiWiki::FailReason->new("$page does not link to $link", "" => 1);
+}
 
-sub match_backlink ($$;@) { #{{{
-	return match_link($_[1], $_[0], @_);
-} #}}}
+sub match_backlink ($$;@) {
+	my $ret=match_link($_[1], $_[0], @_);
+	$ret->influences($_[1] => $IkiWiki::DEPEND_LINKS);
+	return $ret;
+}
 
-sub match_created_before ($$;@) { #{{{
+sub match_created_before ($$;@) {
 	my $page=shift;
 	my $testpage=shift;
+	my %params=@_;
+	
+	$testpage=derel($testpage, $params{location});
 
 	if (exists $IkiWiki::pagectime{$testpage}) {
 		if ($IkiWiki::pagectime{$page} < $IkiWiki::pagectime{$testpage}) {
-			return IkiWiki::SuccessReason->new("$page created before $testpage");
+			return IkiWiki::SuccessReason->new("$page created before $testpage", $testpage => $IkiWiki::DEPEND_PRESENCE);
 		}
 		else {
-			return IkiWiki::FailReason->new("$page not created before $testpage");
+			return IkiWiki::FailReason->new("$page not created before $testpage", $testpage => $IkiWiki::DEPEND_PRESENCE);
 		}
 	}
 	else {
-		return IkiWiki::FailReason->new("$testpage has no ctime");
+		return IkiWiki::ErrorReason->new("$testpage does not exist", $testpage => $IkiWiki::DEPEND_PRESENCE);
 	}
-} #}}}
+}
 
-sub match_created_after ($$;@) { #{{{
+sub match_created_after ($$;@) {
 	my $page=shift;
 	my $testpage=shift;
+	my %params=@_;
+	
+	$testpage=derel($testpage, $params{location});
 
 	if (exists $IkiWiki::pagectime{$testpage}) {
 		if ($IkiWiki::pagectime{$page} > $IkiWiki::pagectime{$testpage}) {
-			return IkiWiki::SuccessReason->new("$page created after $testpage");
+			return IkiWiki::SuccessReason->new("$page created after $testpage", $testpage => $IkiWiki::DEPEND_PRESENCE);
 		}
 		else {
-			return IkiWiki::FailReason->new("$page not created after $testpage");
+			return IkiWiki::FailReason->new("$page not created after $testpage", $testpage => $IkiWiki::DEPEND_PRESENCE);
 		}
 	}
 	else {
-		return IkiWiki::FailReason->new("$testpage has no ctime");
+		return IkiWiki::ErrorReason->new("$testpage does not exist", $testpage => $IkiWiki::DEPEND_PRESENCE);
 	}
-} #}}}
+}
 
-sub match_creation_day ($$;@) { #{{{
+sub match_creation_day ($$;@) {
 	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 ($$;@) { #{{{
+sub match_creation_month ($$;@) {
 	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 ($$;@) { #{{{
+sub match_creation_year ($$;@) {
 	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');
 	}
-} #}}}
+}
 
-sub match_user ($$;@) { #{{{
+sub match_user ($$;@) {
 	shift;
 	my $user=shift;
 	my %params=@_;
 	
 	if (! exists $params{user}) {
-		return IkiWiki::FailReason->new("no user specified");
+		return IkiWiki::ErrorReason->new("no user specified");
 	}
 
 	if (defined $params{user} && lc $params{user} eq lc $user) {
@@ -1982,15 +2287,15 @@ sub match_user ($$;@) { #{{{
 	else {
 		return IkiWiki::FailReason->new("user is $params{user}, not $user");
 	}
-} #}}}
+}
 
-sub match_admin ($$;@) { #{{{
+sub match_admin ($$;@) {
 	shift;
 	shift;
 	my %params=@_;
 	
 	if (! exists $params{user}) {
-		return IkiWiki::FailReason->new("no user specified");
+		return IkiWiki::ErrorReason->new("no user specified");
 	}
 
 	if (defined $params{user} && IkiWiki::is_admin($params{user})) {
@@ -2002,15 +2307,15 @@ sub match_admin ($$;@) { #{{{
 	else {
 		return IkiWiki::FailReason->new("user is not an admin");
 	}
-} #}}}
+}
 
-sub match_ip ($$;@) { #{{{
+sub match_ip ($$;@) {
 	shift;
 	my $ip=shift;
 	my %params=@_;
 	
 	if (! exists $params{ip}) {
-		return IkiWiki::FailReason->new("no IP specified");
+		return IkiWiki::ErrorReason->new("no IP specified");
 	}
 
 	if (defined $params{ip} && lc $params{ip} eq lc $ip) {
@@ -2019,6 +2324,6 @@ sub match_ip ($$;@) { #{{{
 	else {
 		return IkiWiki::FailReason->new("IP is $params{ip}, not $ip");
 	}
-} #}}}
+}
 
 1