X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/8805d6fff22878497cc72d69509b2008e77bd20d..2e15a490067991448c3b65323ad9ecdc774dbfe4:/IkiWiki.pm?ds=sidebyside

diff --git a/IkiWiki.pm b/IkiWiki.pm
index b9a419d1d..fa71f4791 100644
--- a/IkiWiki.pm
+++ b/IkiWiki.pm
@@ -5,26 +5,27 @@ package IkiWiki;
 use warnings;
 use strict;
 use Encode;
-use HTML::Entities;
+use Fcntl q{:flock};
 use URI::Escape q{uri_escape_utf8};
-use POSIX;
+use POSIX ();
 use Storable;
 use open qw{:utf8 :std};
 
 use vars qw{%config %links %oldlinks %pagemtime %pagectime %pagecase
-	    %pagestate %wikistate %renderedfiles %oldrenderedfiles
-	    %pagesources %destsources %depends %depends_simple %hooks
-	    %forcerebuild %loaded_plugins};
+	%pagestate %wikistate %renderedfiles %oldrenderedfiles
+	%pagesources %delpagesources %destsources %depends %depends_simple
+	@mass_depends %hooks %forcerebuild %loaded_plugins %typedlinks
+	%oldtypedlinks %autofiles @underlayfiles $lastrev $phase};
 
 use Exporter q{import};
-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 ngettext urlto targetpage
-		 add_underlay pagetitle titlepage linkpage newpagefile
-		 inject add_link
-                 %config %links %pagestate %wikistate %renderedfiles
-                 %pagesources %destsources);
+our @EXPORT = qw(hook debug error htmlpage template template_depends
+	deptype add_depends pagespec_match pagespec_match_list bestlink
+	htmllink readfile writefile pagetype srcfile pagename
+	displaytime strftime_utf8 will_render gettext ngettext urlto targetpage
+	add_underlay pagetitle titlepage linkpage newpagefile
+	inject add_link add_autofile useragent
+	%config %links %pagestate %wikistate %renderedfiles
+	%pagesources %destsources %typedlinks);
 our $VERSION = 3.00; # plugin interface version, next is ikiwiki version
 our $version='unknown'; # VERSION_AUTOREPLACE done by Makefile, DNE
 our $installdir='/usr'; # INSTALLDIR_AUTOREPLACE done by Makefile, DNE
@@ -34,9 +35,15 @@ our $DEPEND_CONTENT=1;
 our $DEPEND_PRESENCE=2;
 our $DEPEND_LINKS=4;
 
+# Phases of processing.
+sub PHASE_SCAN () { 0 }
+sub PHASE_RENDER () { 1 }
+$phase = PHASE_SCAN;
+
 # Optimisation.
 use Memoize;
 memoize("abs2rel");
+memoize("sortspec_translate");
 memoize("pagespec_translate");
 memoize("template_file");
 
@@ -102,6 +109,14 @@ sub getsetup () {
 		safe => 1,
 		rebuild => 1,
 	},
+	reverse_proxy => {
+		type => "boolean",
+		default => 0,
+		description => "do not adjust cgiurl if CGI is accessed via different URL",
+		advanced => 0,
+		safe => 1,
+		rebuild => 0, # only affects CGI requests
+	},
 	cgi_wrapper => {
 		type => "string",
 		default => '',
@@ -117,6 +132,29 @@ sub getsetup () {
 		safe => 0,
 		rebuild => 0,
 	},
+	cgi_overload_delay => {
+		type => "string",
+		default => '',
+		example => "10",
+		description => "number of seconds to delay CGI requests when overloaded",
+		safe => 1,
+		rebuild => 0,
+	},
+	cgi_overload_message => {
+		type => "string",
+		default => '',
+		example => "Please wait",
+		description => "message to display when overloaded (may contain html)",
+		safe => 1,
+		rebuild => 0,
+	},
+	only_committed_changes => {
+		type => "boolean",
+		default => 0,
+		description => "enable optimization of only refreshing committed changes?",
+		safe => 1,
+		rebuild => 0,
+	},
 	rcs => {
 		type => "string",
 		default => '',
@@ -128,7 +166,8 @@ sub getsetup () {
 		type => "internal",
 		default => [qw{mdwn link inline meta htmlscrubber passwordauth
 				openid signinedit lockedit conditional
-				recentchanges parentlinks editpage}],
+				recentchanges parentlinks editpage
+				templatebody}],
 		description => "plugins to enable by default",
 		safe => 0,
 		rebuild => 1,
@@ -150,18 +189,11 @@ sub getsetup () {
 	templatedir => {
 		type => "string",
 		default => "$installdir/share/ikiwiki/templates",
-		description => "location of template files",
+		description => "additional directory to search for template files",
 		advanced => 1,
 		safe => 0, # path
 		rebuild => 1,
 	},
-	templatedirs => {
-		type => "internal",
-		default => [],
-		description => "additional directories containing template files",
-		safe => 0,
-		rebuild => 0,
-	},
 	underlaydir => {
 		type => "string",
 		default => "$installdir/share/ikiwiki/basewiki",
@@ -240,6 +272,14 @@ sub getsetup () {
 		safe => 1,
 		rebuild => 1,
 	},
+	html5 => {
+		type => "boolean",
+		default => 0,
+		description => "use elements new in HTML5 like <section>?",
+		advanced => 0,
+		safe => 1,
+		rebuild => 1,
+	},
 	sslcookie => {
 		type => "boolean",
 		default => 0,
@@ -303,9 +343,9 @@ sub getsetup () {
 		rebuild => 0,
 	},
 	umask => {
-		type => "integer",
-		example => "022",
-		description => "force ikiwiki to use a particular umask",
+		type => "string",
+		example => "public",
+		description => "force ikiwiki to use a particular umask (keywords public, group or private, or a number)",
 		advanced => 1,
 		safe => 0, # paranoia
 		rebuild => 0,
@@ -318,11 +358,20 @@ sub getsetup () {
 		safe => 0, # paranoia
 		rebuild => 0,
 	},
+	libdirs => {
+		type => "string",
+		default => [],
+		example => ["$ENV{HOME}/.local/share/ikiwiki"],
+		description => "extra library and plugin directories",
+		advanced => 1,
+		safe => 0, # directory
+		rebuild => 0,
+	},
 	libdir => {
 		type => "string",
 		default => "",
 		example => "$ENV{HOME}/.ikiwiki/",
-		description => "extra library and plugin directory",
+		description => "extra library and plugin directory (searched after libdirs)",
 		advanced => 1,
 		safe => 0, # directory
 		rebuild => 0,
@@ -334,18 +383,35 @@ sub getsetup () {
 		safe => 0, # paranoia
 		rebuild => 0,
 	},
+	timezone => {
+		type => "string", 
+		default => "",
+		example => "US/Eastern",
+		description => "time zone name",
+		safe => 1,
+		rebuild => 1,
+	},
+	include => {
+		type => "string",
+		default => undef,
+		example => '^\.htaccess$',
+		description => "regexp of normally excluded files to include",
+		advanced => 1,
+		safe => 0, # regexp
+		rebuild => 1,
+	},
 	exclude => {
 		type => "string",
 		default => undef,
-		example => '\.wav$',
-		description => "regexp of source files to ignore",
+		example => '^(*\.private|Makefile)$',
+		description => "regexp of files that should be skipped",
 		advanced => 1,
 		safe => 0, # regexp
 		rebuild => 1,
 	},
 	wiki_file_prune_regexps => {
 		type => "internal",
-		default => [qr/(^|\/)\.\.(\/|$)/, qr/^\./, qr/\/\./,
+		default => [qr/(^|\/)\.\.(\/|$)/, qr/^\//, qr/^\./, qr/\/\./,
 			qr/\.x?html?$/, qr/\.ikiwiki-new$/,
 			qr/(^|\/).svn\//, qr/.arch-ids\//, qr/{arch}\//,
 			qr/(^|\/)_MTN\//, qr/(^|\/)_darcs\//,
@@ -409,6 +475,13 @@ sub getsetup () {
 		safe => 0,
 		rebuild => 0,
 	},
+	clean => {
+		type => "internal",
+		default => 0,
+		description => "running in clean mode",
+		safe => 0,
+		rebuild => 0,
+	},
 	refresh => {
 		type => "internal",
 		default => 0,
@@ -423,10 +496,16 @@ sub getsetup () {
 		safe => 0,
 		rebuild => 0,
 	},
-	getctime => {
+	wrapper_background_command => {
 		type => "internal",
-		default => 0,
-		description => "running in getctime mode",
+		default => '',
+		description => "background shell command to run",
+		safe => 0,
+		rebuild => 0,
+	},
+	gettime => {
+		type => "internal",
+		description => "running in gettime mode",
 		safe => 0,
 		rebuild => 0,
 	},
@@ -451,6 +530,13 @@ sub getsetup () {
 		safe => 0,
 		rebuild => 0,
 	},
+	setuptype => {
+		type => "internal",
+		default => "Yaml",
+		description => "perl class to use to dump setup file",
+		safe => 0,
+		rebuild => 0,
+	},
 	allow_symlinks_before_srcdir => {
 		type => "boolean",
 		default => 0,
@@ -458,6 +544,47 @@ sub getsetup () {
 		safe => 0,
 		rebuild => 0,
 	},
+	cookiejar => {
+		type => "string",
+		default => { file => "$ENV{HOME}/.ikiwiki/cookies" },
+		description => "cookie control",
+		safe => 0, # hooks into perl module internals
+		rebuild => 0,
+	},
+	useragent => {
+		type => "string",
+		default => "ikiwiki/$version",
+		example => "Wget/1.13.4 (linux-gnu)",
+		description => "set custom user agent string for outbound HTTP requests e.g. when fetching aggregated RSS feeds",
+		safe => 0,
+		rebuild => 0,
+	},
+	responsive_layout => {
+		type => "boolean",
+		default => 1,
+		description => "theme has a responsive layout? (mobile-optimized)",
+		safe => 1,
+		rebuild => 1,
+	},
+	deterministic => {
+		type => "boolean",
+		default => 0,
+		description => "try harder to produce deterministic output",
+		safe => 1,
+		rebuild => 1,
+		advanced => 1,
+	},
+}
+
+sub getlibdirs () {
+	my @libdirs;
+	if ($config{libdirs}) {
+		@libdirs = @{$config{libdirs}};
+	}
+	if (length $config{libdir}) {
+		push @libdirs, $config{libdir};
+	}
+	return @libdirs;
 }
 
 sub defaultconfig () {
@@ -466,10 +593,15 @@ sub defaultconfig () {
 	foreach my $key (keys %s) {
 		push @ret, $key, $s{$key}->{default};
 	}
-	use Data::Dumper;
 	return @ret;
 }
 
+# URL to top of wiki as a path starting with /, valid from any wiki page or
+# the CGI; if that's not possible, an absolute URL. Either way, it ends with /
+my $local_url;
+# URL to CGI script, similar to $local_url
+my $local_cgiurl;
+
 sub checkconfig () {
 	# locale stuff; avoid LC_ALL since it overrides everything
 	if (defined $ENV{LC_ALL}) {
@@ -492,6 +624,23 @@ sub checkconfig () {
 			$ENV{$val}=$config{ENV}{$val};
 		}
 	}
+	if (defined $config{timezone} && length $config{timezone}) {
+		$ENV{TZ}=$config{timezone};
+	}
+	elsif (defined $ENV{TZ} && length $ENV{TZ}) {
+		$config{timezone}=$ENV{TZ};
+	}
+	else {
+		eval q{use Config qw()};
+		error($@) if $@;
+
+		if ($Config::Config{d_gnulibc} && -e '/etc/localtime') {
+			$config{timezone}=$ENV{TZ}=':/etc/localtime';
+		}
+		else {
+			$config{timezone}=$ENV{TZ}='GMT';
+		}
+	}
 
 	if ($config{w3mmode}) {
 		eval q{use Cwd q{abs_path}};
@@ -506,12 +655,81 @@ sub checkconfig () {
 	if ($config{cgi} && ! length $config{url}) {
 		error(gettext("Must specify url to wiki with --url when using --cgi"));
 	}
-	
+
+	if (defined $config{url} && length $config{url}) {
+		eval q{use URI};
+		my $baseurl = URI->new($config{url});
+
+		$local_url = $baseurl->path . "/";
+		$local_cgiurl = undef;
+
+		if (length $config{cgiurl}) {
+			my $cgiurl = URI->new($config{cgiurl});
+
+			$local_cgiurl = $cgiurl->path;
+
+			if ($cgiurl->scheme eq 'https' &&
+				$baseurl->scheme eq 'http') {
+				# We assume that the same content is available
+				# over both http and https, because if it
+				# wasn't, accessing the static content
+				# from the CGI would be mixed-content,
+				# which would be a security flaw.
+
+				if ($cgiurl->authority ne $baseurl->authority) {
+					# use protocol-relative URL for
+					# static content
+					$local_url = "$config{url}/";
+					$local_url =~ s{^http://}{//};
+				}
+				# else use host-relative URL for static content
+
+				# either way, CGI needs to be absolute
+				$local_cgiurl = $config{cgiurl};
+			}
+			elsif ($cgiurl->scheme ne $baseurl->scheme) {
+				# too far apart, fall back to absolute URLs
+				$local_url = "$config{url}/";
+				$local_cgiurl = $config{cgiurl};
+			}
+			elsif ($cgiurl->authority ne $baseurl->authority) {
+				# slightly too far apart, fall back to
+				# protocol-relative URLs
+				$local_url = "$config{url}/";
+				$local_url =~ s{^https?://}{//};
+				$local_cgiurl = $config{cgiurl};
+				$local_cgiurl =~ s{^https?://}{//};
+			}
+			# else keep host-relative URLs
+		}
+
+		$local_url =~ s{//$}{/};
+	}
+	else {
+		$local_cgiurl = $config{cgiurl};
+	}
+
 	$config{wikistatedir}="$config{srcdir}/.ikiwiki"
 		unless exists $config{wikistatedir} && defined $config{wikistatedir};
 
 	if (defined $config{umask}) {
-		umask(possibly_foolish_untaint($config{umask}));
+		my $u = possibly_foolish_untaint($config{umask});
+
+		if ($u =~ m/^\d+$/) {
+			umask($u);
+		}
+		elsif ($u eq 'private') {
+			umask(077);
+		}
+		elsif ($u eq 'group') {
+			umask(027);
+		}
+		elsif ($u eq 'public') {
+			umask(022);
+		}
+		else {
+			error(sprintf(gettext("unsupported umask setting %s"), $u));
+		}
 	}
 
 	run_hooks(checkconfig => sub { shift->() });
@@ -522,14 +740,14 @@ sub checkconfig () {
 sub listplugins () {
 	my %ret;
 
-	foreach my $dir (@INC, $config{libdir}) {
+	foreach my $dir (@INC, getlibdirs()) {
 		next unless defined $dir && length $dir;
 		foreach my $file (glob("$dir/IkiWiki/Plugin/*.pm")) {
 			my ($plugin)=$file=~/.*\/(.*)\.pm$/;
 			$ret{$plugin}=1;
 		}
 	}
-	foreach my $dir ($config{libdir}, "$installdir/lib/ikiwiki") {
+	foreach my $dir (getlibdirs(), "$installdir/lib/ikiwiki") {
 		next unless defined $dir && length $dir;
 		foreach my $file (glob("$dir/plugins/*")) {
 			$ret{basename($file)}=1 if -x $file;
@@ -540,8 +758,8 @@ sub listplugins () {
 }
 
 sub loadplugins () {
-	if (defined $config{libdir} && length $config{libdir}) {
-		unshift @INC, possibly_foolish_untaint($config{libdir});
+	foreach my $dir (getlibdirs()) {
+		unshift @INC, possibly_foolish_untaint($dir);
 	}
 
 	foreach my $plugin (@{$config{default_plugins}}, @{$config{add_plugins}}) {
@@ -568,13 +786,14 @@ sub loadplugins () {
 	return 1;
 }
 
-sub loadplugin ($) {
+sub loadplugin ($;$) {
 	my $plugin=shift;
+	my $force=shift;
 
-	return if grep { $_ eq $plugin} @{$config{disable_plugins}};
+	return if ! $force && grep { $_ eq $plugin} @{$config{disable_plugins}};
 
-	foreach my $dir (defined $config{libdir} ? possibly_foolish_untaint($config{libdir}) : undef,
-	                 "$installdir/lib/ikiwiki") {
+	foreach my $possiblytainteddir (getlibdirs(), "$installdir/lib/ikiwiki") {
+		my $dir = possibly_foolish_untaint($possiblytainteddir);
 		if (defined $dir && -x "$dir/plugins/$plugin") {
 			eval { require IkiWiki::Plugin::external };
 			if ($@) {
@@ -612,6 +831,7 @@ sub debug ($) {
 }
 
 my $log_open=0;
+my $log_failed=0;
 sub log_message ($$) {
 	my $type=shift;
 
@@ -622,9 +842,17 @@ sub log_message ($$) {
 			Sys::Syslog::openlog('ikiwiki', '', 'user');
 			$log_open=1;
 		}
-		return eval {
-			Sys::Syslog::syslog($type, "[$config{wikiname}] %s", join(" ", @_));
+		eval {
+			my $message = "[$config{wikiname}] ".join(" ", @_);
+			utf8::encode($message);
+			Sys::Syslog::syslog($type, "%s", $message);
 		};
+                if ($@) {
+                    print STDERR "failed to syslog: $@" unless $log_failed;
+                    $log_failed=1;
+                    print STDERR "@_\n";
+                }
+                return $@;
 	}
 	elsif (! $config{cgi}) {
 		return print "@_\n";
@@ -685,7 +913,7 @@ sub pagename ($) {
 
 	my $type=pagetype($file);
 	my $page=$file;
- 	$page=~s/\Q.$type\E*$//
+	$page=~s/\Q.$type\E*$//
 		if defined $type && !$hooks{htmlize}{$type}{keepextension}
 			&& !$hooks{htmlize}{$type}{noextension};
 	if ($config{indexpages} && $page=~/(.*)\/index$/) {
@@ -746,17 +974,23 @@ sub srcfile ($;$) {
 	return (srcfile_stat(@_))[0];
 }
 
-sub add_underlay ($) {
+sub add_literal_underlay ($) {
 	my $dir=shift;
 
-	if ($dir !~ /^\//) {
-		$dir="$config{underlaydirbase}/$dir";
-	}
-
 	if (! grep { $_ eq $dir } @{$config{underlaydirs}}) {
 		unshift @{$config{underlaydirs}}, $dir;
 	}
+}
+
+sub add_underlay ($) {
+	my $dir = shift;
 
+	if ($dir !~ /^\//) {
+		$dir="$config{underlaydirbase}/$dir";
+	}
+
+	add_literal_underlay($dir);
+	# why does it return 1? we just don't know
 	return 1;
 }
 
@@ -791,6 +1025,17 @@ sub prep_writefile ($$) {
 		if (-l "$destdir/$test") {
 			error("cannot write to a symlink ($test)");
 		}
+		if (-f _ && $test ne $file) {
+			# Remove conflicting file.
+			foreach my $p (keys %renderedfiles, keys %oldrenderedfiles) {
+				foreach my $f (@{$renderedfiles{$p}}, @{$oldrenderedfiles{$p}}) {
+					if ($f eq $test) {
+						unlink("$destdir/$test");
+						last;
+					}
+				}
+			}
+		}
 		$test=dirname($test);
 	}
 
@@ -844,10 +1089,36 @@ sub will_render ($$;$) {
 	my $dest=shift;
 	my $clear=shift;
 
-	# Important security check.
+	# Important security check for independently created files.
 	if (-e "$config{destdir}/$dest" && ! $config{rebuild} &&
 	    ! grep { $_ eq $dest } (@{$renderedfiles{$page}}, @{$oldrenderedfiles{$page}}, @{$wikistate{editpage}{previews}})) {
-		error("$config{destdir}/$dest independently created, not overwriting with version from $page");
+		my $from_other_page=0;
+	    	# Expensive, but rarely runs.
+		foreach my $p (keys %renderedfiles, keys %oldrenderedfiles) {
+			if (grep {
+				$_ eq $dest ||
+				dirname($_) eq $dest
+			    } @{$renderedfiles{$p}}, @{$oldrenderedfiles{$p}}) {
+				$from_other_page=1;
+				last;
+			}
+		}
+
+		error("$config{destdir}/$dest independently created, not overwriting with version from $page")
+			unless $from_other_page;
+	}
+
+	# If $dest exists as a directory, remove conflicting files in it
+	# rendered from other pages.
+	if (-d _) {
+		foreach my $p (keys %renderedfiles, keys %oldrenderedfiles) {
+			foreach my $f (@{$renderedfiles{$p}}, @{$oldrenderedfiles{$p}}) {
+				if (dirname($f) eq $dest) {
+					unlink("$config{destdir}/$f");
+					rmdir(dirname("$config{destdir}/$f"));
+				}
+			}
+		}
 	}
 
 	if (! $clear || $cleared{$page}) {
@@ -906,7 +1177,7 @@ sub bestlink ($$) {
 sub isinlinableimage ($) {
 	my $file=shift;
 	
-	return $file =~ /\.(png|gif|jpg|jpeg)$/i;
+	return $file =~ /\.(png|gif|jpg|jpeg|svg)$/i;
 }
 
 sub pagetitle ($;$) {
@@ -941,19 +1212,30 @@ sub linkpage ($) {
 sub cgiurl (@) {
 	my %params=@_;
 
-	my $cgiurl=$config{cgiurl};
+	my $cgiurl=$local_cgiurl;
+
 	if (exists $params{cgiurl}) {
 		$cgiurl=$params{cgiurl};
 		delete $params{cgiurl};
 	}
+
+	unless (%params) {
+		return $cgiurl;
+	}
+
 	return $cgiurl."?".
-		join("&amp;", map $_."=".uri_escape_utf8($params{$_}), keys %params);
+		join("&amp;", map $_."=".uri_escape_utf8($params{$_}), sort(keys %params));
+}
+
+sub cgiurl_abs (@) {
+	eval q{use URI};
+	URI->new_abs(cgiurl(@_), $config{cgiurl});
 }
 
 sub baseurl (;$) {
 	my $page=shift;
 
-	return "$config{url}/" if ! defined $page;
+	return $local_url if ! defined $page;
 	
 	$page=htmlpage($page);
 	$page=~s/[^\/]+$//;
@@ -961,6 +1243,16 @@ sub baseurl (;$) {
 	return $page;
 }
 
+sub urlabs ($$) {
+	my $url=shift;
+	my $urlbase=shift;
+
+	return $url unless defined $urlbase && length $urlbase;
+
+	eval q{use URI};
+	URI->new_abs($url, $urlbase)->as_string;
+}
+
 sub abs2rel ($$) {
 	# Work around very innefficient behavior in File::Spec if abs2rel
 	# is passed two relative paths. It's much faster if paths are
@@ -974,10 +1266,18 @@ sub abs2rel ($$) {
 	return $ret;
 }
 
-sub displaytime ($;$) {
+sub displaytime ($;$$) {
 	# Plugins can override this function to mark up the time to
 	# display.
-	return '<span class="date">'.formattime(@_).'</span>';
+	my $time=formattime($_[0], $_[1]);
+	if ($config{html5}) {
+		return '<time datetime="'.date_3339($_[0]).'"'.
+			($_[2] ? ' pubdate="pubdate"' : '').
+			'>'.$time.'</time>';
+	}
+	else {
+		return '<span class="date">'.$time.'</span>';
+	}
 }
 
 sub formattime ($;$) {
@@ -988,9 +1288,29 @@ sub formattime ($;$) {
 		$format=$config{timeformat};
 	}
 
+	return strftime_utf8($format, localtime($time));
+}
+
+my $strftime_encoding;
+sub strftime_utf8 {
 	# strftime doesn't know about encodings, so make sure
-	# its output is properly treated as utf8
-	return decode_utf8(POSIX::strftime($format, localtime($time)));
+	# its output is properly treated as utf8.
+	# Note that this does not handle utf-8 in the format string.
+	($strftime_encoding) = POSIX::setlocale(&POSIX::LC_TIME) =~ m#\.([^@]+)#
+		unless defined $strftime_encoding;
+	$strftime_encoding
+		? Encode::decode($strftime_encoding, POSIX::strftime(@_))
+		: POSIX::strftime(@_);
+}
+
+sub date_3339 ($) {
+	my $time=shift;
+
+	my $lc_time=POSIX::setlocale(&POSIX::LC_TIME);
+	POSIX::setlocale(&POSIX::LC_TIME, "C");
+	my $ret=POSIX::strftime("%Y-%m-%dT%H:%M:%SZ", gmtime($time));
+	POSIX::setlocale(&POSIX::LC_TIME, $lc_time);
+	return $ret;
 }
 
 sub beautify_urlpath ($) {
@@ -1009,13 +1329,13 @@ sub beautify_urlpath ($) {
 	return $url;
 }
 
-sub urlto ($$;$) {
+sub urlto ($;$$) {
 	my $to=shift;
 	my $from=shift;
 	my $absolute=shift;
 	
 	if (! length $to) {
-		return beautify_urlpath(baseurl($from)."index.$config{htmlext}");
+		$to = 'index';
 	}
 
 	if (! $destsources{$to}) {
@@ -1026,11 +1346,26 @@ sub urlto ($$;$) {
 		return $config{url}.beautify_urlpath("/".$to);
 	}
 
+	if (! defined $from) {
+		my $u = $local_url || '';
+		$u =~ s{/$}{};
+		return $u.beautify_urlpath("/".$to);
+	}
+
 	my $link = abs2rel($to, dirname(htmlpage($from)));
 
 	return beautify_urlpath($link);
 }
 
+sub isselflink ($$) {
+	# Plugins can override this function to support special types
+	# of selflinks.
+	my $page=shift;
+	my $link=shift;
+
+	return $page eq $link;
+}
+
 sub htmllink ($$$;@) {
 	my $lpage=shift; # the page doing the linking
 	my $page=shift; # the page that will contain the link (different for inline)
@@ -1056,21 +1391,23 @@ sub htmllink ($$$;@) {
 	}
 	
 	return "<span class=\"selflink\">$linktext</span>"
-		if length $bestlink && $page eq $bestlink &&
+		if length $bestlink && isselflink($page, $bestlink) &&
 		   ! defined $opts{anchor};
 	
 	if (! $destsources{$bestlink}) {
 		$bestlink=htmlpage($bestlink);
 
 		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>"
+			my $cgilink = "";
+			if (length $config{cgiurl}) {
+				$cgilink = "<a href=\"".
+					cgiurl(
+						do => "create",
+						page => $link,
+						from => $lpage
+					)."\" rel=\"nofollow\">?</a>";
+			}
+			return "<span class=\"createlink\">$cgilink$linktext</span>"
 		}
 	}
 	
@@ -1100,10 +1437,11 @@ sub userpage ($) {
 	return length $config{userdir} ? "$config{userdir}/$user" : $user;
 }
 
+# Username to display for openid accounts.
 sub openiduser ($) {
 	my $user=shift;
 
-	if ($user =~ m!^https?://! &&
+	if (defined $user && $user =~ m!^https?://! &&
 	    eval q{use Net::OpenID::VerifiedIdentity; 1} && !$@) {
 		my $display;
 
@@ -1124,7 +1462,7 @@ sub openiduser ($) {
 		# Convert "http://somehost.com/user" to "user [somehost.com]".
 		# (also "https://somehost.com/user/")
 		if ($display !~ /\[/) {
-			$display=~s/^https?:\/\/(.+)\/([^\/]+)\/?$/$2 [$1]/;
+			$display=~s/^https?:\/\/(.+)\/([^\/#?]+)\/?(?:[#?].*)?$/$2 [$1]/;
 		}
 		$display=~s!^https?://!!; # make sure this is removed
 		eval q{use CGI 'escapeHTML'};
@@ -1134,6 +1472,36 @@ sub openiduser ($) {
 	return;
 }
 
+# Username to display for emailauth accounts. 
+sub emailuser ($) {
+	my $user=shift;
+	if (defined $user && $user =~ m/(.+)@/) {
+		my $nick=$1;
+		# remove any characters from not allowed in wiki files
+		# support use w/o %config set
+		my $chars = defined $config{wiki_file_chars} ? $config{wiki_file_chars} : "-[:alnum:]+/.:_";
+		$nick=~s/[^$chars]/_/g;
+		return $nick;
+	}
+	return;
+}
+
+# Some user information should not be exposed in commit metadata, etc.
+# This generates a cloaked form of such information.
+sub cloak ($) {
+	my $user=shift;
+	# cloak email address using http://xmlns.com/foaf/spec/#term_mbox_sha1sum
+	if ($user=~m/(.+)@/) {
+		my $nick=$1;
+		eval q{use Digest::SHA};
+		return $user if $@;
+		return $nick.'@'.Digest::SHA::sha1_hex("mailto:$user");
+	}
+	else {
+		return $user;
+	}
+}
+
 sub htmlize ($$$$) {
 	my $page=shift;
 	my $destpage=shift;
@@ -1141,7 +1509,7 @@ sub htmlize ($$$$) {
 	my $content=shift;
 	
 	my $oneline = $content !~ /\n/;
-
+	
 	if (exists $hooks{htmlize}{$type}) {
 		$content=$hooks{htmlize}{$type}{call}->(
 			page => $page,
@@ -1162,10 +1530,9 @@ sub htmlize ($$$$) {
 	
 	if ($oneline) {
 		# hack to get rid of enclosing junk added by markdown
-		# and other htmlizers
+		# and other htmlizers/sanitizers
 		$content=~s/^<p>//i;
-		$content=~s/<\/p>$//i;
-		chomp $content;
+		$content=~s/<\/p>\n*$//i;
 	}
 
 	return $content;
@@ -1216,16 +1583,21 @@ sub preprocess ($$$;$$) {
 			# consider it significant.
 			my @params;
 			while ($params =~ m{
-				(?:([-\w]+)=)?		# 1: named parameter key?
+				(?:([-.\w]+)=)?		# 1: named parameter key?
 				(?:
 					"""(.*?)"""	# 2: triple-quoted value
 				|
-					"([^"]+)"	# 3: single-quoted value
+					"([^"]*?)"	# 3: single-quoted value
+				|
+					'''(.*?)'''     # 4: triple-single-quote
 				|
-					(\S+)		# 4: unquoted value
+					<<([a-zA-Z]+)\n # 5: heredoc start
+					(.*?)\n\5	# 6: heredoc value
+				|
+					(\S+)		# 7: unquoted value
 				)
 				(?:\s+|$)		# delimiter to next param
-			}sgx) {
+			}msgx) {
 				my $key=$1;
 				my $val;
 				if (defined $2) {
@@ -1240,6 +1612,12 @@ sub preprocess ($$$;$$) {
 				elsif (defined $4) {
 					$val=$4;
 				}
+				elsif (defined $7) {
+					$val=$7;
+				}
+				elsif (defined $6) {
+					$val=$6;
+				}
 
 				if (defined $key) {
 					push @params, $key, $val;
@@ -1248,7 +1626,7 @@ sub preprocess ($$$;$$) {
 					push @params, $val, '';
 				}
 			}
-			if ($preprocessing{$page}++ > 3) {
+			if ($preprocessing{$page}++ > 8) {
 				# Avoid loops of preprocessed pages preprocessing
 				# other pages that preprocess them, etc.
 				return "[[!$command <span class=\"error\">".
@@ -1269,6 +1647,8 @@ sub preprocess ($$$;$$) {
 				if ($@) {
 					my $error=$@;
 					chomp $error;
+					eval q{use HTML::Entities};
+					$error = encode_entities($error);
 				 	$ret="[[!$command <span class=\"error\">".
 						gettext("Error").": $error"."</span>]]";
 				}
@@ -1302,11 +1682,16 @@ sub preprocess ($$$;$$) {
 			(		# 4: the parameters..
 				\s+	# Must have space if parameters present
 				(?:
-					(?:[-\w]+=)?		# named parameter key?
+					(?:[-.\w]+=)?		# named parameter key?
 					(?:
 						""".*?"""	# triple-quoted value
 						|
-						"[^"]+"		# single-quoted value
+						"[^"]*?"	# single-quoted value
+						|
+						'''.*?'''	# triple-single-quote
+						|
+						<<([a-zA-Z]+)\n # 5: heredoc start
+						(?:.*?)\n\5	# heredoc value
 						|
 						[^"\s\]]+	# unquoted value
 					)
@@ -1325,11 +1710,16 @@ sub preprocess ($$$;$$) {
 			\s+
 			(		# 4: the parameters..
 				(?:
-					(?:[-\w]+=)?		# named parameter key?
+					(?:[-.\w]+=)?		# named parameter key?
 					(?:
 						""".*?"""	# triple-quoted value
 						|
-						"[^"]+"		# single-quoted value
+						"[^"]*?"	# single-quoted value
+						|
+						'''.*?'''       # triple-single-quote
+						|
+						<<([a-zA-Z]+)\n # 5: heredoc start
+						(?:.*?)\n\5	# heredoc value
 						|
 						[^"\s\]]+	# unquoted value
 					)
@@ -1358,10 +1748,6 @@ sub filter ($$$) {
 	return $content;
 }
 
-sub indexlink () {
-	return "<a href=\"$config{url}\">$config{wikiname}</a>";
-}
-
 sub check_canedit ($$$;$) {
 	my $page=shift;
 	my $q=shift;
@@ -1426,6 +1812,69 @@ sub check_content (@) {
 	return defined $ok ? $ok : 1;
 }
 
+sub check_canchange (@) {
+	my %params = @_;
+	my $cgi = $params{cgi};
+	my $session = $params{session};
+	my @changes = @{$params{changes}};
+
+	my %newfiles;
+	foreach my $change (@changes) {
+		# This untaint is safe because we check file_pruned and
+		# wiki_file_regexp.
+		my ($file)=$change->{file}=~/$config{wiki_file_regexp}/;
+		$file=possibly_foolish_untaint($file);
+		if (! defined $file || ! length $file ||
+		    file_pruned($file)) {
+			error(gettext("bad file name %s"), $file);
+		}
+
+		my $type=pagetype($file);
+		my $page=pagename($file) if defined $type;
+
+		if ($change->{action} eq 'add') {
+			$newfiles{$file}=1;
+		}
+
+		if ($change->{action} eq 'change' ||
+		    $change->{action} eq 'add') {
+			if (defined $page) {
+				check_canedit($page, $cgi, $session);
+				next;
+			}
+			else {
+				if (IkiWiki::Plugin::attachment->can("check_canattach")) {
+					IkiWiki::Plugin::attachment::check_canattach($session, $file, $change->{path});
+					check_canedit($file, $cgi, $session);
+					next;
+				}
+			}
+		}
+		elsif ($change->{action} eq 'remove') {
+			# check_canremove tests to see if the file is present
+			# on disk. This will fail when a single commit adds a
+			# file and then removes it again. Avoid the problem
+			# by not testing the removal in such pairs of changes.
+			# (The add is still tested, just to make sure that
+			# no data is added to the repo that a web edit
+			# could not add.)
+			next if $newfiles{$file};
+
+			if (IkiWiki::Plugin::remove->can("check_canremove")) {
+				IkiWiki::Plugin::remove::check_canremove(defined $page ? $page : $file, $cgi, $session);
+				check_canedit(defined $page ? $page : $file, $cgi, $session);
+				next;
+			}
+		}
+		else {
+			error "unknown action ".$change->{action};
+		}
+
+		error sprintf(gettext("you are not allowed to change %s"), $file);
+	}
+}
+
+
 my $wikilock;
 
 sub lockwiki () {
@@ -1436,8 +1885,11 @@ sub lockwiki () {
 	}
 	open($wikilock, '>', "$config{wikistatedir}/lockfile") ||
 		error ("cannot write to $config{wikistatedir}/lockfile: $!");
-	if (! flock($wikilock, 2)) { # LOCK_EX
-		error("failed to get lock");
+	if (! flock($wikilock, LOCK_EX | LOCK_NB)) {
+		debug("failed to get lock; waiting...");
+		if (! flock($wikilock, LOCK_EX)) {
+			error("failed to get lock");
+		}
 	}
 	return 1;
 }
@@ -1477,10 +1929,11 @@ sub enable_commit_hook () {
 
 sub loadindex () {
 	%oldrenderedfiles=%pagectime=();
-	if (! $config{rebuild}) {
+	my $rebuild=$config{rebuild};
+	if (! $rebuild) {
 		%pagesources=%pagemtime=%oldlinks=%links=%depends=
 		%destsources=%renderedfiles=%pagecase=%pagestate=
-		%depends_simple=();
+		%depends_simple=%typedlinks=%oldtypedlinks=();
 	}
 	my $in;
 	if (! open ($in, "<", "$config{wikistatedir}/indexdb")) {
@@ -1489,6 +1942,8 @@ sub loadindex () {
 			open ($in, "<", "$config{wikistatedir}/indexdb") || return;
 		}
 		else {
+			# gettime on first build
+			$config{gettime}=1 unless defined $config{gettime};
 			return;
 		}
 	}
@@ -1502,6 +1957,12 @@ sub loadindex () {
 	if (exists $index->{version} && ! ref $index->{version}) {
 		$pages=$index->{page};
 		%wikistate=%{$index->{state}};
+		# Handle plugins that got disabled by loading a new setup.
+		if (exists $config{setupfile}) {
+			require IkiWiki::Setup;
+			IkiWiki::Setup::disabled_plugins(
+				grep { ! $loaded_plugins{$_} } keys %wikistate);
+		}
 	}
 	else {
 		$pages=$index;
@@ -1510,10 +1971,16 @@ sub loadindex () {
 
 	foreach my $src (keys %$pages) {
 		my $d=$pages->{$src};
-		my $page=pagename($src);
+		my $page;
+		if (exists $d->{page} && ! $rebuild) {
+			$page=$d->{page};
+		}
+		else {
+			$page=pagename($src);
+		}
 		$pagectime{$page}=$d->{ctime};
-		if (! $config{rebuild}) {
-			$pagesources{$page}=$src;
+		$pagesources{$page}=$src;
+		if (! $rebuild) {
 			$pagemtime{$page}=$d->{mtime};
 			$renderedfiles{$page}=$d->{dest};
 			if (exists $d->{links} && ref $d->{links}) {
@@ -1546,6 +2013,14 @@ sub loadindex () {
 			if (exists $d->{state}) {
 				$pagestate{$page}=$d->{state};
 			}
+			if (exists $d->{typedlinks}) {
+				$typedlinks{$page}=$d->{typedlinks};
+
+				while (my ($type, $links) = each %{$typedlinks{$page}}) {
+					next unless %$links;
+					$oldtypedlinks{$page}{$type} = {%$links};
+				}
+			}
 		}
 		$oldrenderedfiles{$page}=[@{$d->{dest}}];
 	}
@@ -1555,17 +2030,15 @@ sub loadindex () {
 	foreach my $page (keys %renderedfiles) {
 		$destsources{$_}=$page foreach @{$renderedfiles{$page}};
 	}
+	$lastrev=$index->{lastrev};
+	@underlayfiles=@{$index->{underlayfiles}} if ref $index->{underlayfiles};
 	return close($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;
+	my @plugins=keys %loaded_plugins;
 
 	if (! -d $config{wikistatedir}) {
 		mkdir($config{wikistatedir});
@@ -1580,6 +2053,7 @@ sub saveindex () {
 		my $src=$pagesources{$page};
 
 		$index{page}{$src}={
+			page => $page,
 			ctime => $pagectime{$page},
 			mtime => $pagemtime{$page},
 			dest => $renderedfiles{$page},
@@ -1594,22 +2068,26 @@ sub saveindex () {
 			$index{page}{$src}{depends_simple} = $depends_simple{$page};
 		}
 
+		if (exists $typedlinks{$page} && %{$typedlinks{$page}}) {
+			$index{page}{$src}{typedlinks} = $typedlinks{$page};
+		}
+
 		if (exists $pagestate{$page}) {
-			foreach my $id (@hookids) {
-				foreach my $key (keys %{$pagestate{$page}{$id}}) {
-					$index{page}{$src}{state}{$id}{$key}=$pagestate{$page}{$id}{$key};
-				}
-			}
+			$index{page}{$src}{state}=$pagestate{$page};
 		}
 	}
 
 	$index{state}={};
-	foreach my $id (@hookids) {
+	foreach my $id (@plugins) {
+		$index{state}{$id}={}; # used to detect disabled plugins
 		foreach my $key (keys %{$wikistate{$id}}) {
 			$index{state}{$id}{$key}=$wikistate{$id}{$key};
 		}
 	}
 	
+	$index{lastrev}=$lastrev;
+	$index{underlayfiles}=\@underlayfiles;
+
 	$index{version}="3";
 	my $ret=Storable::nstore_fd(\%index, $out);
 	return if ! defined $ret || ! $ret;
@@ -1621,58 +2099,103 @@ sub saveindex () {
 }
 
 sub template_file ($) {
-	my $template=shift;
+	my $name=shift;
+	
+	my $tpage=($name =~ s/^\///) ? $name : "templates/$name";
+	my $template;
+	if ($name !~ /\.tmpl$/ && exists $pagesources{$tpage}) {
+		$template=srcfile($pagesources{$tpage}, 1);
+		$name.=".tmpl";
+	}
+	else {
+		$template=srcfile($tpage, 1);
+	}
 
-	foreach my $dir ($config{templatedir}, @{$config{templatedirs}},
-	                 "$installdir/share/ikiwiki/templates") {
-		return "$dir/$template" if -e "$dir/$template";
+	if (defined $template) {
+		return $template, $tpage, 1 if wantarray;
+		return $template;
+	}
+	else {
+		$name=~s:/::; # avoid path traversal
+		foreach my $dir ($config{templatedir},
+		                 "$installdir/share/ikiwiki/templates") {
+			if (-e "$dir/$name") {
+				$template="$dir/$name";
+				last;
+			}
+		}
+		if (defined $template) {	
+			return $template, $tpage if wantarray;
+			return $template;
+		}
 	}
+
 	return;
 }
 
-sub template_params (@) {
-	my $filename=template_file(shift);
-
+sub template_depends ($$;@) {
+	my $name=shift;
+	my $page=shift;
+	
+	my ($filename, $tpage, $untrusted)=template_file($name);
 	if (! defined $filename) {
-		return if wantarray;
-		return "";
+		error(sprintf(gettext("template %s not found"), $name))
+	}
+
+	if (defined $page && defined $tpage) {
+		add_depends($page, $tpage);
 	}
 
-	my @ret=(
+	my @opts=(
 		filter => sub {
 			my $text_ref = shift;
 			${$text_ref} = decode_utf8(${$text_ref});
+			run_hooks(readtemplate => sub {
+				${$text_ref} = shift->(
+					id => $name,
+					page => $tpage,
+					content => ${$text_ref},
+					untrusted => $untrusted,
+				);
+			});
 		},
-		filename => $filename,
 		loop_context_vars => 1,
 		die_on_bad_params => 0,
-		@_
+		parent_global_vars => 1,
+		filename => $filename,
+		@_,
+		($untrusted ? (no_includes => 1) : ()),
 	);
-	return wantarray ? @ret : {@ret};
+	return @opts if wantarray;
+
+	require HTML::Template;
+	return HTML::Template->new(@opts);
 }
 
 sub template ($;@) {
-	require HTML::Template;
-	return HTML::Template->new(template_params(@_));
+	template_depends(shift, undef, @_);
 }
 
-sub misctemplate ($$;@) {
-	my $title=shift;
-	my $pagebody=shift;
-	
-	my $template=template("misc.tmpl");
-	$template->param(
-		title => $title,
-		indexlink => indexlink(),
-		wikiname => $config{wikiname},
-		pagebody => $pagebody,
-		baseurl => baseurl(),
-		@_,
-	);
-	run_hooks(pagetemplate => sub {
-		shift->(page => "", destpage => "", template => $template);
+sub templateactions ($$) {
+	my $template=shift;
+	my $page=shift;
+
+	my $have_actions=0;
+	my @actions;
+	run_hooks(pageactions => sub {
+		push @actions, map { { action => $_ } } 
+			grep { defined } shift->(page => $page);
 	});
-	return $template->output;
+	$template->param(actions => \@actions);
+
+	if ($config{cgiurl} && exists $hooks{auth}) {
+		$template->param(prefsurl => cgiurl(do => "prefs"));
+		$have_actions=1;
+	}
+
+	if ($have_actions || @actions) {
+		$template->param(have_actions => 1);
+	}
 }
 
 sub hook (@) {
@@ -1723,11 +2246,11 @@ 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}->(@_);
 }
 
@@ -1747,7 +2270,7 @@ sub rcs_recentchanges ($) {
 	$hooks{rcs}{rcs_recentchanges}{call}->(@_);
 }
 
-sub rcs_diff ($) {
+sub rcs_diff ($;$) {
 	$hooks{rcs}{rcs_diff}{call}->(@_);
 }
 
@@ -1755,6 +2278,10 @@ sub rcs_getctime ($) {
 	$hooks{rcs}{rcs_getctime}{call}->(@_);
 }
 
+sub rcs_getmtime ($) {
+	$hooks{rcs}{rcs_getmtime}{call}->(@_);
+}
+
 sub rcs_receive () {
 	$hooks{rcs}{rcs_receive}{call}->();
 }
@@ -1773,14 +2300,16 @@ sub add_depends ($$;$) {
 
 	# Add explicit dependencies for influences.
 	my $sub=pagespec_translate($pagespec);
-	return if $@;
+	return unless defined $sub;
 	foreach my $p (keys %pagesources) {
 		my $r=$sub->($p, location => $page);
 		my $i=$r->influences;
+		my $static=$r->influences_static;
 		foreach my $k (keys %$i) {
+			next unless $r || $static || $k eq $page;
 			$depends_simple{$page}{lc $k} |= $i->{$k};
 		}
-		last if $r->influences_static;
+		last if $static;
 	}
 
 	$depends{$page}{$pagespec} |= $deptype;
@@ -1803,18 +2332,19 @@ sub deptype (@) {
 	return $deptype;
 }
 
-sub file_pruned ($;$) {
+my $file_prune_regexp;
+sub file_pruned ($) {
 	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/+##;
+
+	if (defined $config{include} && length $config{include}) {
+		return 0 if $file =~ m/$config{include}/;
 	}
 
-	my $regexp='('.join('|', @{$config{wiki_file_prune_regexps}}).')';
-	return $file =~ m/$regexp/;
+	if (! defined $file_prune_regexp) {
+		$file_prune_regexp='('.join('|', @{$config{wiki_file_prune_regexps}}).')';
+		$file_prune_regexp=qr/$file_prune_regexp/;
+	}
+	return $file =~ m/$file_prune_regexp/;
 }
 
 sub define_gettext () {
@@ -1843,7 +2373,7 @@ sub define_gettext () {
 			return shift;
 		}
 	};
-  	*ngettext=sub {
+	*ngettext=sub {
 		$getobj->() if $getobj;
 		if ($gettext_obj) {
 			$gettext_obj->nget(@_);
@@ -1895,12 +2425,99 @@ sub inject {
 	use warnings;
 }
 
-sub add_link ($$) {
+sub add_link ($$;$) {
 	my $page=shift;
 	my $link=shift;
+	my $type=shift;
 
 	push @{$links{$page}}, $link
 		unless grep { $_ eq $link } @{$links{$page}};
+
+	if (defined $type) {
+		$typedlinks{$page}{$type}{$link} = 1;
+	}
+}
+
+sub add_autofile ($$$) {
+	my $file=shift;
+	my $plugin=shift;
+	my $generator=shift;
+	
+	$autofiles{$file}{plugin}=$plugin;
+	$autofiles{$file}{generator}=$generator;
+}
+
+sub useragent () {
+	return LWP::UserAgent->new(
+		cookie_jar => $config{cookiejar},
+		env_proxy => 1,		# respect proxy env vars
+		agent => $config{useragent},
+	);
+}
+
+sub sortspec_translate ($$) {
+	my $spec = shift;
+	my $reverse = shift;
+
+	my $code = "";
+	my @data;
+	while ($spec =~ m{
+		\s*
+		(-?)		# group 1: perhaps negated
+		\s*
+		(		# group 2: a word
+			\w+\([^\)]*\)	# command(params)
+			|
+			[^\s]+		# or anything else
+		)
+		\s*
+	}gx) {
+		my $negated = $1;
+		my $word = $2;
+		my $params = undef;
+
+		if ($word =~ m/^(\w+)\((.*)\)$/) {
+			# command with parameters
+			$params = $2;
+			$word = $1;
+		}
+		elsif ($word !~ m/^\w+$/) {
+			error(sprintf(gettext("invalid sort type %s"), $word));
+		}
+
+		if (length $code) {
+			$code .= " || ";
+		}
+
+		if ($negated) {
+			$code .= "-";
+		}
+
+		if (exists $IkiWiki::SortSpec::{"cmp_$word"}) {
+			if (defined $params) {
+				push @data, $params;
+				$code .= "IkiWiki::SortSpec::cmp_$word(\$data[$#data])";
+			}
+			else {
+				$code .= "IkiWiki::SortSpec::cmp_$word(undef)";
+			}
+		}
+		else {
+			error(sprintf(gettext("unknown sort type %s"), $word));
+		}
+	}
+
+	if (! length $code) {
+		# undefined sorting method... sort arbitrarily
+		return sub { 0 };
+	}
+
+	if ($reverse) {
+		$code="-($code)";
+	}
+
+	no warnings;
+	return eval 'sub { '.$code.' }';
 }
 
 sub pagespec_translate ($) {
@@ -1970,10 +2587,23 @@ sub pagespec_match ($$;@) {
 
 	my $sub=pagespec_translate($spec);
 	return IkiWiki::ErrorReason->new("syntax error in pagespec \"$spec\"")
-		if $@ || ! defined $sub;
+		if ! defined $sub;
 	return $sub->($page, @params);
 }
 
+# e.g. @pages = sort_pages("title", \@pages, reverse => "yes")
+#
+# Not exported yet, but could be in future if it is generally useful.
+# Note that this signature is not the same as IkiWiki::SortSpec::sort_pages,
+# which is "more internal".
+sub sort_pages ($$;@) {
+	my $sort = shift;
+	my $list = shift;
+	my %params = @_;
+	$sort = sortspec_translate($sort, $params{reverse});
+	return IkiWiki::SortSpec::sort_pages($sort, @$list);
+}
+
 sub pagespec_match_list ($$;@) {
 	my $page=shift;
 	my $pagespec=shift;
@@ -1988,7 +2618,9 @@ sub pagespec_match_list ($$;@) {
 
 	my $sub=pagespec_translate($pagespec);
 	error "syntax error in pagespec \"$pagespec\""
-		if $@ || ! defined $sub;
+		if ! defined $sub;
+	my $sort=sortspec_translate($params{sort}, $params{reverse})
+		if defined $params{sort};
 
 	my @candidates;
 	if (exists $params{list}) {
@@ -2001,39 +2633,19 @@ sub pagespec_match_list ($$;@) {
 			? 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
+	$depends{$page}{$pagespec} |= ($params{deptype} || $DEPEND_CONTENT);
 	my $num=$params{num};
 	delete @params{qw{num deptype reverse sort filter list}};
 	
+	# when only the top matches will be returned, it's efficient to
+	# sort before matching to pagespec,
+	if (defined $num && defined $sort) {
+		@candidates=IkiWiki::SortSpec::sort_pages(
+			$sort, @candidates);
+	}
+	
 	my @matches;
 	my $firstfail;
 	my $count=0;
@@ -2042,6 +2654,9 @@ sub pagespec_match_list ($$;@) {
 		my $r=$sub->($p, %params, location => $page);
 		error(sprintf(gettext("cannot match pages: %s"), $r))
 			if $r->isa("IkiWiki::ErrorReason");
+		unless ($r || $r->influences_static) {
+			$r->remove_influence($p);
+		}
 		$accum |= $r;
 		if ($r) {
 			push @matches, $p;
@@ -2055,21 +2670,28 @@ sub pagespec_match_list ($$;@) {
 		$depends_simple{$page}{lc $k} |= $i->{$k};
 	}
 
-	return @matches;
+	# when all matches will be returned, it's efficient to
+	# sort after matching
+	if (! defined $num && defined $sort) {
+		return IkiWiki::SortSpec::sort_pages(
+			$sort, @matches);
+	}
+	else {
+		return @matches;
+	}
 }
 
 sub pagespec_valid ($) {
 	my $spec=shift;
 
-	my $sub=pagespec_translate($spec);
-	return ! $@;
+	return defined pagespec_translate($spec);
 }
 
 sub glob2re ($) {
 	my $re=quotemeta(shift);
 	$re=~s/\\\*/.*/g;
 	$re=~s/\\\?/./g;
-	return $re;
+	return qr/^$re$/i;
 }
 
 package IkiWiki::FailReason;
@@ -2087,21 +2709,48 @@ our @ISA = 'IkiWiki::SuccessReason';
 
 package IkiWiki::SuccessReason;
 
+# A blessed array-ref:
+#
+# [0]: human-readable reason for success (or, in FailReason subclass, failure)
+# [1]{""}:
+#      - if absent or false, the influences of this evaluation are "static",
+#        see the influences_static method
+#      - if true, they are dynamic (not static)
+# [1]{any other key}:
+#      the dependency types of influences, as returned by the influences method
+
 use overload (
+	# in string context, it's the human-readable reason
 	'""'	=> sub { $_[0][0] },
+	# in boolean context, SuccessReason is 1 and FailReason is 0
 	'0+'	=> sub { 1 },
+	# negating a result gives the opposite result with the same influences
 	'!'	=> sub { bless $_[0], 'IkiWiki::FailReason'},
+	# A & B = (A ? B : A) with the influences of both
 	'&'	=> sub { $_[1]->merge_influences($_[0], 1); $_[1] },
+	# A | B = (A ? A : B) with the influences of both
 	'|'	=> sub { $_[0]->merge_influences($_[1]); $_[0] },
 	fallback => 1,
 );
 
+# SuccessReason->new("human-readable reason", page => deptype, ...)
+
 sub new {
 	my $class = shift;
 	my $value = shift;
 	return bless [$value, {@_}], $class;
 }
 
+# influences(): return a reference to a copy of the hash
+# { page => dependency type } describing the pages that indirectly influenced
+# this result, but would not cause a dependency through ikiwiki's core
+# dependency logic.
+#
+# See [[todo/dependency_types]] for extensive discussion of what this means.
+#
+# influences(page => deptype, ...): remove all influences, replace them
+# with the arguments, and return a reference to a copy of the new influences.
+
 sub influences {
 	my $this=shift;
 	$this->[1]={@_} if @_;
@@ -2110,17 +2759,48 @@ sub influences {
 	return \%i;
 }
 
+# True if this result has the same influences whichever page it matches,
+# For instance, whether bar matches backlink(foo) is influenced only by
+# the set of links in foo, so its only influence is { foo => DEPEND_LINKS },
+# which does not mention bar anywhere.
+#
+# False if this result would have different influences when matching
+# different pages. For instance, when testing whether link(foo) matches bar,
+# { bar => DEPEND_LINKS } is an influence on that result, because changing
+# bar's links could change the outcome; so its influences are not the same
+# as when testing whether link(foo) matches baz.
+#
+# Static influences are one of the things that make pagespec_match_list
+# more efficient than repeated calls to pagespec_match.
+
 sub influences_static {
 	return ! $_[0][1]->{""};
 }
 
+# Change the influences of $this to be the influences of "$this & $other"
+# or "$this | $other".
+#
+# If both $this and $other are either successful or have influences,
+# or this is an "or" operation, the result has all the influences from
+# either of the arguments. It has dynamic influences if either argument
+# has dynamic influences.
+#
+# If this is an "and" operation, and at least one argument is a
+# FailReason with no influences, the result has no influences, and they
+# are not dynamic. For instance, link(foo) matching bar is influenced
+# by bar, but enabled(ddate) has no influences. Suppose ddate is disabled;
+# then (link(foo) and enabled(ddate)) not matching bar is not influenced by
+# bar, because it would be false however often you edit bar.
+
 sub merge_influences {
 	my $this=shift;
 	my $other=shift;
 	my $anded=shift;
 
+	# This "if" is odd because it needs to avoid negating $this
+	# or $other, which would alter the objects in-place. Be careful.
 	if (! $anded || (($this || %{$this->[1]}) &&
-	                ($other || %{$other->[1]}))) {
+	                 ($other || %{$other->[1]}))) {
 		foreach my $influence (keys %{$other->[1]}) {
 			$this->[1]{$influence} |= $other->[1]{$influence};
 		}
@@ -2131,6 +2811,15 @@ sub merge_influences {
 	}
 }
 
+# Change $this so it is not considered to be influenced by $torm.
+
+sub remove_influence {
+	my $this=shift;
+	my $torm=shift;
+
+	delete $this->[1]{$torm};
+}
+
 package IkiWiki::ErrorReason;
 
 our @ISA = 'IkiWiki::FailReason';
@@ -2141,15 +2830,23 @@ sub derel ($$) {
 	my $path=shift;
 	my $from=shift;
 
-	if ($path =~ m!^\./!) {
-		$from=~s#/?[^/]+$## if defined $from;
-		$path=~s#^\./##;
-		$path="$from/$path" if length $from;
+	if ($path =~ m!^\.(/|$)!) {
+		if ($1) {
+			$from=~s#/?[^/]+$## if defined $from;
+			$path=~s#^\./##;
+			$path="$from/$path" if defined $from && length $from;
+		}
+		else {
+			$path = $from;
+			$path = "" unless defined $path;
+		}
 	}
 
 	return $path;
 }
 
+my %glob_cache;
+
 sub match_glob ($$;@) {
 	my $page=shift;
 	my $glob=shift;
@@ -2157,8 +2854,13 @@ sub match_glob ($$;@) {
 	
 	$glob=derel($glob, $params{location});
 
-	my $regexp=IkiWiki::glob2re($glob);
-	if ($page=~/^$regexp$/i) {
+	# Instead of converting the glob to a regex every time,
+	# cache the compiled regex to save time.
+	my $re=$glob_cache{$glob};
+	unless (defined $re) {
+		$glob_cache{$glob} = $re = IkiWiki::glob2re($glob);
+	}
+	if ($page =~ $re) {
 		if (! IkiWiki::isinternal($page) || $params{internal}) {
 			return IkiWiki::SuccessReason->new("$glob matches $page");
 		}
@@ -2172,7 +2874,22 @@ sub match_glob ($$;@) {
 }
 
 sub match_internal ($$;@) {
-	return match_glob($_[0], $_[1], @_, internal => 1)
+	return match_glob(shift, shift, @_, internal => 1)
+}
+
+sub match_page ($$;@) {
+	my $page=shift;
+	my $match=match_glob($page, shift, @_);
+	if ($match) {
+		my $source=exists $IkiWiki::pagesources{$page} ?
+			$IkiWiki::pagesources{$page} :
+			$IkiWiki::delpagesources{$page};
+		my $type=defined $source ? IkiWiki::pagetype($source) : undef;
+		if (! defined $type) {	
+			return IkiWiki::FailReason->new("$page is not a page");
+		}
+	}
+	return $match;
 }
 
 sub match_link ($$;@) {
@@ -2182,31 +2899,47 @@ sub match_link ($$;@) {
 
 	$link=derel($link, $params{location});
 	my $from=exists $params{location} ? $params{location} : '';
+	my $linktype=$params{linktype};
+	my $qualifier='';
+	if (defined $linktype) {
+		$qualifier=" with type $linktype";
+	}
 
 	my $links = $IkiWiki::links{$page};
-	return IkiWiki::FailReason->new("$page has no links", "" => 1)
+	return IkiWiki::FailReason->new("$page has no links", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
 		unless $links && @{$links};
 	my $bestlink = IkiWiki::bestlink($from, $link);
 	foreach my $p (@{$links}) {
+		next unless (! defined $linktype || exists $IkiWiki::typedlinks{$page}{$linktype}{$p});
+
 		if (length $bestlink) {
-			return IkiWiki::SuccessReason->new("$page links to $link", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
-				if $bestlink eq IkiWiki::bestlink($page, $p);
+			if ($bestlink eq IkiWiki::bestlink($page, $p)) {
+				return IkiWiki::SuccessReason->new("$page links to $link$qualifier", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
+			}
 		}
 		else {
-			return IkiWiki::SuccessReason->new("$page links to page $p matching $link", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
-				if match_glob($p, $link, %params);
+			if (match_glob($p, $link, %params)) {
+				return IkiWiki::SuccessReason->new("$page links to page $p$qualifier, matching $link", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
+			}
 			my ($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, $link, %params);
+			if (match_glob($p_rel, $link, %params)) {
+				return IkiWiki::SuccessReason->new("$page links to page $p_rel$qualifier, matching $link", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
+			}
 		}
 	}
-	return IkiWiki::FailReason->new("$page does not link to $link", "" => 1);
+	return IkiWiki::FailReason->new("$page does not link to $link$qualifier", $page => $IkiWiki::DEPEND_LINKS, "" => 1);
 }
 
 sub match_backlink ($$;@) {
-	my $ret=match_link($_[1], $_[0], @_);
-	$ret->influences($_[1] => $IkiWiki::DEPEND_LINKS);
+	my $page=shift;
+	my $testpage=shift;
+	my %params=@_;
+	if ($testpage eq '.') {
+		$testpage = $params{'location'}
+	}
+	my $ret=match_link($testpage, $page, @_);
+	$ret->influences($testpage => $IkiWiki::DEPEND_LINKS);
 	return $ret;
 }
 
@@ -2251,7 +2984,12 @@ sub match_created_after ($$;@) {
 }
 
 sub match_creation_day ($$;@) {
-	if ((gmtime($IkiWiki::pagectime{shift()}))[3] == shift) {
+	my $page=shift;
+	my $d=shift;
+	if ($d !~ /^\d+$/) {
+		return IkiWiki::ErrorReason->new("invalid day $d");
+	}
+	if ((localtime($IkiWiki::pagectime{$page}))[3] == $d) {
 		return IkiWiki::SuccessReason->new('creation_day matched');
 	}
 	else {
@@ -2260,7 +2998,12 @@ sub match_creation_day ($$;@) {
 }
 
 sub match_creation_month ($$;@) {
-	if ((gmtime($IkiWiki::pagectime{shift()}))[4] + 1 == shift) {
+	my $page=shift;
+	my $m=shift;
+	if ($m !~ /^\d+$/) {
+		return IkiWiki::ErrorReason->new("invalid month $m");
+	}
+	if ((localtime($IkiWiki::pagectime{$page}))[4] + 1 == $m) {
 		return IkiWiki::SuccessReason->new('creation_month matched');
 	}
 	else {
@@ -2269,7 +3012,12 @@ sub match_creation_month ($$;@) {
 }
 
 sub match_creation_year ($$;@) {
-	if ((gmtime($IkiWiki::pagectime{shift()}))[5] + 1900 == shift) {
+	my $page=shift;
+	my $y=shift;
+	if ($y !~ /^\d+$/) {
+		return IkiWiki::ErrorReason->new("invalid year $y");
+	}
+	if ((localtime($IkiWiki::pagectime{$page}))[5] + 1900 == $y) {
 		return IkiWiki::SuccessReason->new('creation_year matched');
 	}
 	else {
@@ -2282,13 +3030,13 @@ sub match_user ($$;@) {
 	my $user=shift;
 	my %params=@_;
 	
-	my $regexp=IkiWiki::glob2re($user);
-	
 	if (! exists $params{user}) {
 		return IkiWiki::ErrorReason->new("no user specified");
 	}
 
-	if (defined $params{user} && $params{user}=~/^$regexp$/i) {
+	my $regexp=IkiWiki::glob2re($user);
+	
+	if (defined $params{user} && $params{user}=~$regexp) {
 		return IkiWiki::SuccessReason->new("user is $user");
 	}
 	elsif (! defined $params{user}) {
@@ -2327,8 +3075,10 @@ sub match_ip ($$;@) {
 	if (! exists $params{ip}) {
 		return IkiWiki::ErrorReason->new("no IP specified");
 	}
+	
+	my $regexp=IkiWiki::glob2re(lc $ip);
 
-	if (defined $params{ip} && lc $params{ip} eq lc $ip) {
+	if (defined $params{ip} && lc $params{ip}=~$regexp) {
 		return IkiWiki::SuccessReason->new("IP is $ip");
 	}
 	else {
@@ -2336,4 +3086,23 @@ sub match_ip ($$;@) {
 	}
 }
 
+package IkiWiki::SortSpec;
+
+# This is in the SortSpec namespace so that the $a and $b that sort() uses
+# are easily available in this namespace, for cmp functions to use them.
+sub sort_pages {
+	my $f=shift;
+	sort $f @_
+}
+
+sub cmp_title {
+	IkiWiki::pagetitle(IkiWiki::basename($a))
+	cmp
+	IkiWiki::pagetitle(IkiWiki::basename($b))
+}
+
+sub cmp_path { IkiWiki::pagetitle($a) cmp IkiWiki::pagetitle($b) }
+sub cmp_mtime { $IkiWiki::pagemtime{$b} <=> $IkiWiki::pagemtime{$a} }
+sub cmp_age { $IkiWiki::pagectime{$b} <=> $IkiWiki::pagectime{$a} }
+
 1