X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/b3d65aee1822cce5d8612f05c972d8db32721bee..136846d442ea25a79203cdefe1eafbbce37197b1:/IkiWiki.pm

diff --git a/IkiWiki.pm b/IkiWiki.pm
index 5563a03af..8136a7c4b 100644
--- a/IkiWiki.pm
+++ b/IkiWiki.pm
@@ -5,34 +5,41 @@ package IkiWiki;
 use warnings;
 use strict;
 use Encode;
-use HTML::Entities;
 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 %hooks %forcerebuild
-	    %loaded_plugins};
+	%pagestate %wikistate %renderedfiles %oldrenderedfiles
+	%pagesources %delpagesources %destsources %depends %depends_simple
+	@mass_depends %hooks %forcerebuild %loaded_plugins %typedlinks
+	%oldtypedlinks %autofiles};
 
 use Exporter q{import};
-our @EXPORT = qw(hook debug error template htmlpage 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 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 will_render gettext ngettext urlto targetpage
+	add_underlay pagetitle titlepage linkpage newpagefile
+	inject add_link add_autofile
+	%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
 
+# Page dependency types.
+our $DEPEND_CONTENT=1;
+our $DEPEND_PRESENCE=2;
+our $DEPEND_LINKS=4;
+
 # Optimisation.
 use Memoize;
 memoize("abs2rel");
+memoize("sortspec_translate");
 memoize("pagespec_translate");
-memoize("file_pruned");
+memoize("template_file");
 
 sub getsetup () {
 	wikiname => {
@@ -144,7 +151,7 @@ sub getsetup () {
 	templatedir => {
 		type => "string",
 		default => "$installdir/share/ikiwiki/templates",
-		description => "location of template files",
+		description => "additional directory to search for template files",
 		advanced => 1,
 		safe => 0, # path
 		rebuild => 1,
@@ -227,6 +234,14 @@ sub getsetup () {
 		safe => 1,
 		rebuild => 1,
 	},
+	html5 => {
+		type => "boolean",
+		default => 0,
+		description => "generate HTML5? (experimental)",
+		advanced => 1,
+		safe => 1,
+		rebuild => 1,
+	},
 	sslcookie => {
 		type => "boolean",
 		default => 0,
@@ -321,22 +336,39 @@ sub getsetup () {
 		safe => 0, # paranoia
 		rebuild => 0,
 	},
+	timezone => {
+		type => "string", 
+		default => "",
+		example => "US/Eastern",
+		description => "time zone name",
+		safe => 1,
+		rebuild => 1,
+	},
+	include => {
+		type => "string",
+		default => undef,
+		example => '^\.htaccess$',
+		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\//,
-			qr/\.dpkg-tmp$/],
+			qr/(^|\/)CVS\//, qr/\.dpkg-tmp$/],
 		description => "regexps of source files to ignore",
 		safe => 0,
 		rebuild => 1,
@@ -356,7 +388,7 @@ 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,
@@ -396,6 +428,13 @@ 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,
@@ -410,10 +449,16 @@ 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,
 	},
@@ -438,6 +483,13 @@ 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,
@@ -453,10 +505,15 @@ 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}) {
@@ -479,6 +536,12 @@ sub checkconfig () {
 			$ENV{$val}=$config{ENV}{$val};
 		}
 	}
+	if (defined $config{timezone} && length $config{timezone}) {
+		$ENV{TZ}=$config{timezone};
+	}
+	else {
+		$config{timezone}=$ENV{TZ};
+	}
 
 	if ($config{w3mmode}) {
 		eval q{use Cwd q{abs_path}};
@@ -493,7 +556,33 @@ sub checkconfig () {
 	if ($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 ne $baseurl->scheme or
+				$cgiurl->authority ne $baseurl->authority) {
+				# too far apart, fall back to absolute URLs
+				$local_url = "$config{url}/";
+				$local_cgiurl = $config{cgiurl};
+			}
+		}
+
+		$local_url =~ s{//$}{/};
+	}
+	else {
+		$local_cgiurl = $config{cgiurl};
+	}
+
 	$config{wikistatedir}="$config{srcdir}/.ikiwiki"
 		unless exists $config{wikistatedir} && defined $config{wikistatedir};
 
@@ -536,12 +625,12 @@ 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");
 	}
 
@@ -555,10 +644,11 @@ 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,
 	                 "$installdir/lib/ikiwiki") {
@@ -672,7 +762,7 @@ sub pagename ($) {
 
 	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} && $page=~/(.*)\/index$/) {
@@ -733,17 +823,23 @@ 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;
 }
 
@@ -778,6 +874,17 @@ 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);
 	}
 
@@ -831,10 +938,36 @@ 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}) {
@@ -868,7 +1001,7 @@ sub bestlink ($$) {
 		$l.="/" if length $l;
 		$l.=$link;
 
-		if (exists $links{$l}) {
+		if (exists $pagesources{$l}) {
 			return $l;
 		}
 		elsif (exists $pagecase{lc $l}) {
@@ -878,7 +1011,7 @@ 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 $l}) {
@@ -928,14 +1061,25 @@ sub linkpage ($) {
 sub cgiurl (@) {
 	my %params=@_;
 
-	return $config{cgiurl}."?".
+	my $cgiurl=$local_cgiurl;
+
+	if (exists $params{cgiurl}) {
+		$cgiurl=$params{cgiurl};
+		delete $params{cgiurl};
+	}
+
+	unless (%params) {
+		return $cgiurl;
+	}
+
+	return $cgiurl."?".
 		join("&", map $_."=".uri_escape_utf8($params{$_}), keys %params);
 }
 
 sub baseurl (;$) {
 	my $page=shift;
 
-	return "$config{url}/" if ! defined $page;
+	return $local_url if ! defined $page;
 	
 	$page=htmlpage($page);
 	$page=~s/[^\/]+$//;
@@ -943,6 +1087,16 @@ 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
@@ -956,10 +1110,18 @@ 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 ($;$) {
@@ -975,6 +1137,16 @@ sub formattime ($;$) {
 	return decode_utf8(POSIX::strftime($format, localtime($time)));
 }
 
+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 $ret;
+}
+
 sub beautify_urlpath ($) {
 	my $url=shift;
 
@@ -991,13 +1163,13 @@ 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}) {
@@ -1008,11 +1180,26 @@ 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)
@@ -1038,21 +1225,23 @@ 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}) {
+				$cgilink = "<a href=\"".
+					cgiurl(
+						do => "create",
+						page => lc($link),
+						from => $lpage
+					)."\" rel=\"nofollow\">?</a>";
+			}
+			return "<span class=\"createlink\">$cgilink$linktext</span>"
 		}
 	}
 	
@@ -1068,29 +1257,32 @@ 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 userpage ($) {
+	my $user=shift;
+	return length $config{userdir} ? "$config{userdir}/$user" : $user;
+}
+
 sub openiduser ($) {
 	my $user=shift;
 
-	if ($user =~ m!^https?://! &&
+	if (defined $user && $user =~ m!^https?://! &&
 	    eval q{use Net::OpenID::VerifiedIdentity; 1} && !$@) {
 		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
+			# backcompat with old version
 			my $oid=Net::OpenID::VerifiedIdentity->new(identity => $user);
 			$display=$oid->display;
 		}
@@ -1103,7 +1295,7 @@ 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]/;
 		}
 		$display=~s!^https?://!!; # make sure this is removed
 		eval q{use CGI 'escapeHTML'};
@@ -1113,23 +1305,6 @@ sub openiduser ($) {
 	return;
 }
 
-sub userlink ($) {
-	my $user=shift;
-
-	my $oiduser=eval { openiduser($user) };
-	if (defined $oiduser) {
-		return "<a href=\"$user\">$oiduser</a>";
-	}
-	else {
-		eval q{use CGI 'escapeHTML'};
-		error($@) if $@;
-
-		return htmllink("", "", escapeHTML(
-			length $config{userdir} ? $config{userdir}."/".$user : $user
-		), noimageinline => 1);
-	}
-}
-
 sub htmlize ($$$$) {
 	my $page=shift;
 	my $destpage=shift;
@@ -1137,7 +1312,7 @@ sub htmlize ($$$$) {
 	my $content=shift;
 	
 	my $oneline = $content !~ /\n/;
-
+	
 	if (exists $hooks{htmlize}{$type}) {
 		$content=$hooks{htmlize}{$type}{call}->(
 			page => $page,
@@ -1158,10 +1333,9 @@ 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;
@@ -1216,12 +1390,16 @@ sub preprocess ($$$;$$) {
 				(?:
 					"""(.*?)"""	# 2: triple-quoted value
 				|
-					"([^"]+)"	# 3: single-quoted value
+					"([^"]*?)"	# 3: single-quoted value
+				|
+					'''(.*?)'''     # 4: triple-single-quote
+				|
+					<<(?<start>[a-zA-Z]+)\n(?<heredoc>.*?)\n\k<start> # 5, 6: heredoc'd value.
 				|
-					(\S+)		# 4: unquoted value
+					(\S+)		# 7: unquoted value
 				)
 				(?:\s+|$)		# delimiter to next param
-			}sgx) {
+			}msgx) {
 				my $key=$1;
 				my $val;
 				if (defined $2) {
@@ -1236,6 +1414,12 @@ sub preprocess ($$$;$$) {
 				elsif (defined $4) {
 					$val=$4;
 				}
+				elsif (defined $7) {
+					$val=$7;
+				}
+				elsif (defined $+{heredoc}) {
+					$val=$+{heredoc};
+				}
 
 				if (defined $key) {
 					push @params, $key, $val;
@@ -1302,7 +1486,11 @@ sub preprocess ($$$;$$) {
 					(?:
 						""".*?"""	# triple-quoted value
 						|
-						"[^"]+"		# single-quoted value
+						"[^"]*?"	# single-quoted value
+						|
+						<<(?<start>[a-zA-Z]+)\n(?<heredoc>.*?)\n\k<start> # heredoc'd value.
+						|
+						'''.*?''' # triple-single-quoted value
 						|
 						[^"\s\]]+	# unquoted value
 					)
@@ -1325,7 +1513,11 @@ sub preprocess ($$$;$$) {
 					(?:
 						""".*?"""	# triple-quoted value
 						|
-						"[^"]+"		# single-quoted value
+						"[^"]*?"	# single-quoted value
+						|
+						'''.*?'''       # triple-single-quoted value
+						|
+						<<(?<start>[a-zA-Z]+)\n(?<heredoc>.*?)\n\k<start> # heredoc'd value.
 						|
 						[^"\s\]]+	# unquoted value
 					)
@@ -1354,10 +1546,6 @@ sub filter ($$$) {
 	return $content;
 }
 
-sub indexlink () {
-	return "<a href=\"$config{url}\">$config{wikiname}</a>";
-}
-
 sub check_canedit ($$$;$) {
 	my $page=shift;
 	my $q=shift;
@@ -1395,7 +1583,7 @@ sub check_content (@) {
 		my %old=map { $_ => 1 }
 		        split("\n", readfile(srcfile($pagesources{$params{page}})));
 		foreach my $line (split("\n", $params{content})) {
-			push @diff, $line if ! exists $old{$_};
+			push @diff, $line if ! exists $old{$line};
 		}
 		$params{diff}=join("\n", @diff);
 	}
@@ -1422,6 +1610,69 @@ 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 () {
@@ -1475,7 +1726,8 @@ sub loadindex () {
 	%oldrenderedfiles=%pagectime=();
 	if (! $config{rebuild}) {
 		%pagesources=%pagemtime=%oldlinks=%links=%depends=
-		%destsources=%renderedfiles=%pagecase=%pagestate=();
+		%destsources=%renderedfiles=%pagecase=%pagestate=
+		%depends_simple=%typedlinks=%oldtypedlinks=();
 	}
 	my $in;
 	if (! open ($in, "<", "$config{wikistatedir}/indexdb")) {
@@ -1484,6 +1736,7 @@ sub loadindex () {
 			open ($in, "<", "$config{wikistatedir}/indexdb") || return;
 		}
 		else {
+			$config{gettime}=1; # first build
 			return;
 		}
 	}
@@ -1497,6 +1750,12 @@ 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;
@@ -1507,25 +1766,48 @@ sub loadindex () {
 		my $d=$pages->{$src};
 		my $page=pagename($src);
 		$pagectime{$page}=$d->{ctime};
+		$pagesources{$page}=$src;
 		if (! $config{rebuild}) {
-			$pagesources{$page}=$src;
 			$pagemtime{$page}=$d->{mtime};
 			$renderedfiles{$page}=$d->{dest};
 			if (exists $d->{links} && ref $d->{links}) {
 				$links{$page}=$d->{links};
 				$oldlinks{$page}=[@{$d->{links}}];
 			}
+			if (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 { $_ => 1 } @{$d->{dependslist}}
+					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} => 1};
+				$depends{$page}=$d->{depends};
 			}
 			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}}];
 	}
@@ -1541,11 +1823,7 @@ sub loadindex () {
 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});
@@ -1567,11 +1845,19 @@ sub saveindex () {
 		};
 
 		if (exists $depends{$page}) {
-			$index{page}{$src}{dependslist} = [ keys %{$depends{$page}} ];
+			$index{page}{$src}{depends} = $depends{$page};
+		}
+
+		if (exists $depends_simple{$page}) {
+			$index{page}{$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 $id (@plugins) {
 				foreach my $key (keys %{$pagestate{$page}{$id}}) {
 					$index{page}{$src}{state}{$id}{$key}=$pagestate{$page}{$id}{$key};
 				}
@@ -1580,7 +1866,8 @@ sub saveindex () {
 	}
 
 	$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};
 		}
@@ -1597,57 +1884,95 @@ 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}, "$installdir/share/ikiwiki/templates") {
-		return "$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))
 	}
 
-	my @ret=(
+	if (defined $page && defined $tpage) {
+		add_depends($page, $tpage);
+	}
+	
+	my @opts=(
 		filter => sub {
 			my $text_ref = shift;
 			${$text_ref} = decode_utf8(${$text_ref});
 		},
-		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 (@) {
@@ -1698,11 +2023,11 @@ 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}->(@_);
 }
 
@@ -1722,7 +2047,7 @@ sub rcs_recentchanges ($) {
 	$hooks{rcs}{rcs_recentchanges}{call}->(@_);
 }
 
-sub rcs_diff ($) {
+sub rcs_diff ($;$) {
 	$hooks{rcs}{rcs_diff}{call}->(@_);
 }
 
@@ -1730,54 +2055,110 @@ sub rcs_getctime ($) {
 	$hooks{rcs}{rcs_getctime}{call}->(@_);
 }
 
+sub rcs_getmtime ($) {
+	$hooks{rcs}{rcs_getmtime}{call}->(@_);
+}
+
 sub rcs_receive () {
 	$hooks{rcs}{rcs_receive}{call}->();
 }
 
-sub add_depends ($$) {
+sub add_depends ($$;$) {
 	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 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 $static;
+	}
 
-	return unless pagespec_valid($pagespec);
-
-	$depends{$page}{$pagespec} = 1;
+	$depends{$page}{$pagespec} |= $deptype;
 	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/+##;
+sub deptype (@) {
+	my $deptype=0;
+	foreach my $type (@_) {
+		if ($type eq 'presence') {
+			$deptype |= $DEPEND_PRESENCE;
+		}
+		elsif ($type eq 'links') { 
+			$deptype |= $DEPEND_LINKS;
+		}
+		elsif ($type eq 'content') {
+			$deptype |= $DEPEND_CONTENT;
+		}
+	}
+	return $deptype;
+}
 
-	my $regexp='('.join('|', @{$config{wiki_file_prune_regexps}}).')';
-	return $file =~ m/$regexp/ && $file ne $base;
+my $file_prune_regexp;
+sub file_pruned ($) {
+	my $file=shift;
+
+	if (defined $config{include} && length $config{include}) {
+		return 0 if $file =~ m/$config{include}/;
+	}
+
+	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 () {
 	# If translation is needed, redefine the gettext function to do it.
 	# Otherwise, it becomes a quick no-op.
-	no warnings 'redefine';
+	my $gettext_obj;
+	my $getobj;
 	if ((exists $ENV{LANG} && length $ENV{LANG}) ||
 	    (exists $ENV{LC_ALL} && length $ENV{LC_ALL}) ||
 	    (exists $ENV{LC_MESSAGES} && length $ENV{LC_MESSAGES})) {
-	    	*gettext=sub {
-			my $gettext_obj=eval q{
+	    	$getobj=sub {
+			$gettext_obj=eval q{
 				use Locale::gettext q{textdomain};
 				Locale::gettext->domain('ikiwiki')
 			};
-
-			if ($gettext_obj) {
-				$gettext_obj->get(shift);
-			}
-			else {
-				return shift;
-			}
 		};
 	}
-	else {
-		*gettext=sub { return shift };
-	}
+
+	no warnings 'redefine';
+	*gettext=sub {
+		$getobj->() if $getobj;
+		if ($gettext_obj) {
+			$gettext_obj->get(shift);
+		}
+		else {
+			return shift;
+		}
+	};
+	*ngettext=sub {
+		$getobj->() if $getobj;
+		if ($gettext_obj) {
+			$gettext_obj->nget(@_);
+		}
+		else {
+			return ($_[2] == 1 ? $_[0] : $_[1])
+		}
+	};
 }
 
 sub gettext {
@@ -1785,6 +2166,11 @@ sub gettext {
 	gettext(@_);
 }
 
+sub ngettext {
+	define_gettext();
+	ngettext(@_);
+}
+
 sub yesno ($) {
 	my $val=shift;
 
@@ -1816,12 +2202,91 @@ 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 ($$$) {
+	my $file=shift;
+	my $plugin=shift;
+	my $generator=shift;
+	
+	$autofiles{$file}{plugin}=$plugin;
+	$autofiles{$file}{generator}=$generator;
+}
+
+sub sortspec_translate ($$) {
+	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 ($) {
@@ -1844,13 +2309,13 @@ sub pagespec_translate ($) {
 			[^\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;
@@ -1891,81 +2356,169 @@ 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);
 }
 
 sub pagespec_match_list ($$;@) {
-	my $pages=shift;
-	my $spec=shift;
-	my @params=@_;
+	my $page=shift;
+	my $pagespec=shift;
+	my %params=@_;
 
-	my $sub=pagespec_translate($spec);
-	error "syntax error in pagespec \"$spec\""
-		if $@ || ! defined $sub;
+	# 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!
+	}
+
+	my $sub=pagespec_translate($pagespec);
+	error "syntax error in pagespec \"$pagespec\""
+		if ! defined $sub;
+	my $sort=sortspec_translate($params{sort}, $params{reverse})
+		if defined $params{sort};
+
+	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;
+	}
 	
-	my @ret;
-	my $r;
-	foreach my $page (@$pages) {
-		$r=$sub->($page, @params);
-		push @ret, $page if $r;
+	# 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;
+	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 $r->isa("IkiWiki::ErrorReason");
+		unless ($r || $r->influences_static) {
+			$r->remove_influence($p);
+		}
+		$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};
 	}
 
-	if (! @ret && defined $r && $r->isa("IkiWiki::ErrorReason")) {
-		error(sprintf(gettext("cannot match pages: %s"), $r));
+	# 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 @ret;
+		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;
 
 use overload (
-	'""'	=> sub { ${$_[0]} },
+	'""'	=> 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;
-}
-
-package IkiWiki::ErrorReason;
-
-our @ISA = 'IkiWiki::FailReason';
+our @ISA = 'IkiWiki::SuccessReason';
 
 package IkiWiki::SuccessReason;
 
 use overload (
-	'""'	=> sub { ${$_[0]} },
+	'""'	=> 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 {
 	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]={};
+	}
+}
+
+sub remove_influence {
+	my $this=shift;
+	my $torm=shift;
+
+	delete $this->[1]{$torm};
+}
+
+package IkiWiki::ErrorReason;
+
+our @ISA = 'IkiWiki::FailReason';
 
 package IkiWiki::PageSpec;
 
@@ -1973,15 +2526,23 @@ 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 ($$;@) {
 	my $page=shift;
 	my $glob=shift;
@@ -1989,8 +2550,13 @@ sub match_glob ($$;@) {
 	
 	$glob=derel($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");
 		}
@@ -2004,7 +2570,22 @@ 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 ($$;@) {
@@ -2014,29 +2595,42 @@ sub match_link ($$;@) {
 
 	$link=derel($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") unless $links && @{$links};
+	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")
-				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 $link")
-				if match_glob($p, $link, %params);
-			$p=~s/^\///;
+			if (match_glob($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 matching $link")
-				if match_glob($p, $link, %params);
+			if (match_glob($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 $link");
+	return IkiWiki::FailReason->new("$page does not link to $link$qualifier", $page => $IkiWiki::DEPEND_LINKS, "" => 1);
 }
 
 sub match_backlink ($$;@) {
-	return match_link($_[1], $_[0], @_);
+	my $ret=match_link($_[1], $_[0], @_);
+	$ret->influences($_[1] => $IkiWiki::DEPEND_LINKS);
+	return $ret;
 }
 
 sub match_created_before ($$;@) {
@@ -2048,14 +2642,14 @@ sub match_created_before ($$;@) {
 
 	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 => $IkiWiki::DEPEND_PRESENCE);
 		}
 	}
 	else {
-		return IkiWiki::ErrorReason->new("$testpage does not exist");
+		return IkiWiki::ErrorReason->new("$testpage does not exist", $testpage => $IkiWiki::DEPEND_PRESENCE);
 	}
 }
 
@@ -2068,19 +2662,24 @@ sub match_created_after ($$;@) {
 
 	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 => $IkiWiki::DEPEND_PRESENCE);
 		}
 	}
 	else {
-		return IkiWiki::ErrorReason->new("$testpage does not exist");
+		return IkiWiki::ErrorReason->new("$testpage does not exist", $testpage => $IkiWiki::DEPEND_PRESENCE);
 	}
 }
 
 sub match_creation_day ($$;@) {
-	if ((gmtime($IkiWiki::pagectime{shift()}))[3] == shift) {
+	my $page=shift;
+	my $d=shift;
+	if ($d !~ /^\d+$/) {
+		return IkiWiki::ErrorReason->new("invalid day $d");
+	}
+	if ((localtime($IkiWiki::pagectime{$page}))[3] == $d) {
 		return IkiWiki::SuccessReason->new('creation_day matched');
 	}
 	else {
@@ -2089,7 +2688,12 @@ sub match_creation_day ($$;@) {
 }
 
 sub match_creation_month ($$;@) {
-	if ((gmtime($IkiWiki::pagectime{shift()}))[4] + 1 == shift) {
+	my $page=shift;
+	my $m=shift;
+	if ($m !~ /^\d+$/) {
+		return IkiWiki::ErrorReason->new("invalid month $m");
+	}
+	if ((localtime($IkiWiki::pagectime{$page}))[4] + 1 == $m) {
 		return IkiWiki::SuccessReason->new('creation_month matched');
 	}
 	else {
@@ -2098,7 +2702,12 @@ sub match_creation_month ($$;@) {
 }
 
 sub match_creation_year ($$;@) {
-	if ((gmtime($IkiWiki::pagectime{shift()}))[5] + 1900 == shift) {
+	my $page=shift;
+	my $y=shift;
+	if ($y !~ /^\d+$/) {
+		return IkiWiki::ErrorReason->new("invalid year $y");
+	}
+	if ((localtime($IkiWiki::pagectime{$page}))[5] + 1900 == $y) {
 		return IkiWiki::SuccessReason->new('creation_year matched');
 	}
 	else {
@@ -2111,11 +2720,13 @@ sub match_user ($$;@) {
 	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} && lc $params{user} eq lc $user) {
+	if (defined $params{user} && $params{user}=~$regexp) {
 		return IkiWiki::SuccessReason->new("user is $user");
 	}
 	elsif (! defined $params{user}) {
@@ -2163,4 +2774,22 @@ 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_mtime { $IkiWiki::pagemtime{$b} <=> $IkiWiki::pagemtime{$a} }
+sub cmp_age { $IkiWiki::pagectime{$b} <=> $IkiWiki::pagectime{$a} }
+
 1