X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/66cb6baf4e205886bfbac8d90d1adc2b791102a2..450ce26d683f1152f3c0b3fbc08f60637c0dbf38:/IkiWiki.pm

diff --git a/IkiWiki.pm b/IkiWiki.pm
index 8143f5256..0c1df8b47 100644
--- a/IkiWiki.pm
+++ b/IkiWiki.pm
@@ -11,12 +11,13 @@ use open qw{:utf8 :std};
 
 use vars qw{%config %links %oldlinks %pagemtime %pagectime %pagecase
             %renderedfiles %oldrenderedfiles %pagesources %destsources
-	    %depends %hooks %forcerebuild $gettext_obj};
+            %depends %hooks %forcerebuild $gettext_obj};
 
 use Exporter q{import};
 our @EXPORT = qw(hook debug error template htmlpage add_depends pagespec_match
                  bestlink htmllink readfile writefile pagetype srcfile pagename
                  displaytime will_render gettext urlto targetpage
+		 add_underlay
                  %config %links %renderedfiles %pagesources %destsources);
 our $VERSION = 2.00; # plugin interface version, next is ikiwiki version
 our $version='unknown'; # VERSION_AUTOREPLACE done by Makefile, DNE
@@ -29,17 +30,34 @@ memoize("pagespec_translate");
 memoize("file_pruned");
 
 sub defaultconfig () { #{{{
+	return
 	wiki_file_prune_regexps => [qr/\.\./, qr/^\./, qr/\/\./,
 		qr/\.x?html?$/, qr/\.ikiwiki-new$/,
 		qr/(^|\/).svn\//, qr/.arch-ids\//, qr/{arch}\//,
+		qr/(^|\/)_MTN\//,
 		qr/\.dpkg-tmp$/],
-	wiki_link_regexp => qr/\[\[(?:([^\]\|]+)\|)?([^\s\]#]+)(?:#([^\s\]]+))?\]\]/,
+	wiki_link_regexp => qr{
+		\[\[                    # beginning of link
+		(?:
+			([^\]\|\n]+)    # 1: link text
+			\|              # followed by '|'
+		)?                      # optional
+		
+		([^\s\]#]+)             # 2: page to link to
+		(?:
+			\#              # '#', beginning of anchor
+			([^\s\]]+)      # 3: anchor text
+		)?                      # optional
+		
+		\]\]                    # end of link
+	}x,
 	wiki_file_regexp => qr/(^[-[:alnum:]_.:\/+]+$)/,
 	web_commit_regexp => qr/^web commit (by (.*?(?=: |$))|from (\d+\.\d+\.\d+\.\d+)):?(.*)/,
 	verbose => 0,
 	syslog => 0,
 	wikiname => "wiki",
 	default_pageext => "mdwn",
+	htmlext => "html",
 	cgi => 0,
 	post_commit => 0,
 	rcs => '',
@@ -66,11 +84,13 @@ sub defaultconfig () { #{{{
 	pingurl => [],
 	templatedir => "$installdir/share/ikiwiki/templates",
 	underlaydir => "$installdir/share/ikiwiki/basewiki",
+	underlaydirs => [],
 	setup => undef,
 	adminuser => undef,
 	adminemail => undef,
 	plugin => [qw{mdwn inline htmlscrubber passwordauth openid signinedit
 	              lockedit conditional}],
+	libdir => undef,
 	timeformat => '%c',
 	locale => undef,
 	sslcookie => 0,
@@ -80,7 +100,7 @@ sub defaultconfig () { #{{{
 	numbacklinks => 10,
 	account_creation_password => "",
 } #}}}
-   
+
 sub checkconfig () { #{{{
 	# locale stuff; avoid LC_ALL since it overrides everything
 	if (defined $ENV{LC_ALL}) {
@@ -112,7 +132,7 @@ sub checkconfig () { #{{{
 		unless exists $config{wikistatedir};
 	
 	if ($config{rcs}) {
-		eval qq{require IkiWiki::Rcs::$config{rcs}};
+		eval qq{use IkiWiki::Rcs::$config{rcs}};
 		if ($@) {
 			error("Failed to load RCS module IkiWiki::Rcs::$config{rcs}: $@");
 		}
@@ -122,17 +142,25 @@ sub checkconfig () { #{{{
 	}
 
 	run_hooks(checkconfig => sub { shift->() });
+
+	return 1;
 } #}}}
 
 sub loadplugins () { #{{{
+	if (defined $config{libdir}) {
+		unshift @INC, possibly_foolish_untaint($config{libdir});
+	}
+
 	loadplugin($_) foreach @{$config{plugin}};
-	
+
 	run_hooks(getopt => sub { shift->() });
 	if (grep /^-/, @ARGV) {
 		print STDERR "Unknown option: $_\n"
 			foreach grep /^-/, @ARGV;
 		usage();
 	}
+
+	return 1;
 } #}}}
 
 sub loadplugin ($) { #{{{
@@ -140,11 +168,21 @@ sub loadplugin ($) { #{{{
 
 	return if grep { $_ eq $plugin} @{$config{disable_plugins}};
 
+	foreach my $dir (defined $config{libdir} ? possibly_foolish_untaint($config{libdir}) : undef,
+	                 "$installdir/lib/ikiwiki") {
+		if (defined $dir && -x "$dir/plugins/$plugin") {
+			require IkiWiki::Plugin::external;
+			import IkiWiki::Plugin::external "$dir/plugins/$plugin";
+			return 1;
+		}
+	}
+
 	my $mod="IkiWiki::Plugin::".possibly_foolish_untaint($plugin);
 	eval qq{use $mod};
 	if ($@) {
 		error("Failed to load plugin $mod: $@");
 	}
+	return 1;
 } #}}}
 
 sub error ($;$) { #{{{
@@ -164,7 +202,7 @@ sub error ($;$) { #{{{
 
 sub debug ($) { #{{{
 	return unless $config{verbose};
-	log_message(debug => @_);
+	return log_message(debug => @_);
 } #}}}
 
 my $log_open=0;
@@ -173,26 +211,26 @@ sub log_message ($$) { #{{{
 
 	if ($config{syslog}) {
 		require Sys::Syslog;
-		unless ($log_open) {
+		if (! $log_open) {
 			Sys::Syslog::setlogsock('unix');
 			Sys::Syslog::openlog('ikiwiki', '', 'user');
 			$log_open=1;
 		}
-		eval {
+		return eval {
 			Sys::Syslog::syslog($type, "[$config{wikiname}] %s", join(" ", @_));
 		};
 	}
 	elsif (! $config{cgi}) {
-		print "@_\n";
+		return print "@_\n";
 	}
 	else {
-		print STDERR "@_\n";
+		return print STDERR "@_\n";
 	}
 } #}}}
 
 sub possibly_foolish_untaint ($) { #{{{
 	my $tainted=shift;
-	my ($untainted)=$tainted=~/(.*)/;
+	my ($untainted)=$tainted=~/(.*)/s;
 	return $untainted;
 } #}}}
 
@@ -216,7 +254,7 @@ sub pagetype ($) { #{{{
 	if ($page =~ /\.([^.]+)$/) {
 		return $1 if exists $hooks{htmlize}{$1};
 	}
-	return undef;
+	return;
 } #}}}
 
 sub pagename ($) { #{{{
@@ -242,15 +280,31 @@ sub targetpage ($$) { #{{{
 sub htmlpage ($) { #{{{
 	my $page=shift;
 	
-	return targetpage($page, "html");
+	return targetpage($page, $config{htmlext});
 } #}}}
 
 sub srcfile ($) { #{{{
 	my $file=shift;
 
 	return "$config{srcdir}/$file" if -e "$config{srcdir}/$file";
-	return "$config{underlaydir}/$file" if -e "$config{underlaydir}/$file";
-	error("internal error: $file cannot be found in $config{srcdir} or $config{underlaydir}");
+	foreach my $dir (@{$config{underlaydirs}}, $config{underlaydir}) {
+		return "$dir/$file" if -e "$dir/$file";
+	}
+	error("internal error: $file cannot be found in $config{srcdir} or underlay");
+	return;
+} #}}}
+
+sub add_underlay ($) { #{{{
+	my $dir=shift;
+
+	if ($dir=~/^\//) {
+		unshift @{$config{underlaydirs}}, $dir;
+	}
+	else {
+		unshift @{$config{underlaydirs}}, "$config{underlaydir}/../$dir";
+	}
+
+	return 1;
 } #}}}
 
 sub readfile ($;$$) { #{{{
@@ -263,11 +317,11 @@ sub readfile ($;$$) { #{{{
 	}
 	
 	local $/=undef;
-	open (IN, $file) || error("failed to read $file: $!");
-	binmode(IN) if ($binary);
-	return \*IN if $wantfd;
-	my $ret=<IN>;
-	close IN || error("failed to read $file: $!");
+	open (my $in, "<", $file) || error("failed to read $file: $!");
+	binmode($in) if ($binary);
+	return \*$in if $wantfd;
+	my $ret=<$in>;
+	close $in || error("failed to read $file: $!");
 	return $ret;
 } #}}}
 
@@ -302,17 +356,19 @@ sub writefile ($$$;$$) { #{{{
 	}
 
 	my $cleanup = sub { unlink($newfile) };
-	open (OUT, ">$newfile") || error("failed to write $newfile: $!", $cleanup);
-	binmode(OUT) if ($binary);
+	open (my $out, '>', $newfile) || error("failed to write $newfile: $!", $cleanup);
+	binmode($out) if ($binary);
 	if ($writer) {
-		$writer->(\*OUT, $cleanup);
+		$writer->(\*$out, $cleanup);
 	}
 	else {
-		print OUT $content or error("failed writing to $newfile: $!", $cleanup);
+		print $out $content or error("failed writing to $newfile: $!", $cleanup);
 	}
-	close OUT || error("failed saving $newfile: $!", $cleanup);
+	close $out || error("failed saving $newfile: $!", $cleanup);
 	rename($newfile, "$destdir/$file") || 
 		error("failed renaming $newfile to $destdir/$file: $!", $cleanup);
+
+	return 1;
 } #}}}
 
 my %cleared;
@@ -338,6 +394,8 @@ sub will_render ($$;$) { #{{{
 		$cleared{$page}=1;
 	}
 	$destsources{$dest}=$page;
+
+	return 1;
 } #}}}
 
 sub bestlink ($$) { #{{{
@@ -380,7 +438,7 @@ sub bestlink ($$) { #{{{
 sub isinlinableimage ($) { #{{{
 	my $file=shift;
 	
-	$file=~/\.(png|gif|jpg|jpeg)$/i;
+	return $file =~ /\.(png|gif|jpg|jpeg)$/i;
 } #}}}
 
 sub pagetitle ($;$) { #{{{
@@ -452,7 +510,7 @@ sub displaytime ($) { #{{{
 sub beautify_url ($) { #{{{
 	my $url=shift;
 
-	$url =~ s!/index.html$!/!;
+	$url =~ s!/index.$config{htmlext}$!/!;
 	$url =~ s!^$!./!; # Browsers don't like empty links...
 
 	return $url;
@@ -526,7 +584,12 @@ sub htmllink ($$$;@) { #{{{
 		$bestlink.="#".$opts{anchor};
 	}
 
-	return "<a href=\"$bestlink\">$linktext</a>";
+	my @attrs;
+	if (defined $opts{rel}) {
+		push @attrs, ' rel="'.$opts{rel}.'"';
+	}
+
+	return "<a href=\"$bestlink\"@attrs>$linktext</a>";
 } #}}}
 
 sub htmlize ($$$) { #{{{
@@ -599,7 +662,17 @@ sub preprocess ($$$;$$) { #{{{
 			# Note: preserve order of params, some plugins may
 			# consider it significant.
 			my @params;
-			while ($params =~ /(?:(\w+)=)?(?:"""(.*?)"""|"([^"]+)"|(\S+))(?:\s+|$)/sg) {
+			while ($params =~ m{
+				(?:(\w+)=)?		# 1: named parameter key?
+				(?:
+					"""(.*?)"""	# 2: triple-quoted value
+				|
+					"([^"]+)"	# 3: single-quoted value
+				|
+					(\S+)		# 4: unquoted value
+				)
+				(?:\s+|$)		# delimiter to next param
+			}sgx) {
 				my $key=$1;
 				my $val;
 				if (defined $2) {
@@ -643,11 +716,31 @@ sub preprocess ($$$;$$) { #{{{
 			return $ret;
 		}
 		else {
-			return "\\[[$command $params]]";
+			return "[[$command $params]]";
 		}
 	};
 	
-	$content =~ s{(\\?)\[\[(\w+)\s+((?:(?:\w+=)?(?:""".*?"""|"[^"]+"|[^\s\]]+)\s*)*)\]\]}{$handle->($1, $2, $3)}seg;
+	$content =~ s{
+		(\\?)		# 1: escape?
+		\[\[		# directive open
+		(\w+)		# 2: command
+		\s+
+		(		# 3: the parameters..
+			(?:
+				(?:\w+=)?		# named parameter key?
+				(?:
+					""".*?"""	# triple-quoted value
+					|
+					"[^"]+"		# single-quoted value
+					|
+					[^\s\]]+	# unquoted value
+				)
+				\s*			# whitespace or end
+							# of directive
+			)
+		*)		# 0 or more parameters
+		\]\]		# directive closed
+	}{$handle->($1, $2, $3)}sexg;
 	return $content;
 } #}}}
 
@@ -668,6 +761,8 @@ sub indexlink () { #{{{
 	return "<a href=\"$config{url}\">$config{wikiname}</a>";
 } #}}}
 
+my $wikilock;
+
 sub lockwiki (;$) { #{{{
 	my $wait=@_ ? shift : 1;
 	# Take an exclusive lock on the wiki to prevent multiple concurrent
@@ -675,15 +770,15 @@ sub lockwiki (;$) { #{{{
 	if (! -d $config{wikistatedir}) {
 		mkdir($config{wikistatedir});
 	}
-	open(WIKILOCK, ">$config{wikistatedir}/lockfile") ||
+	open($wikilock, '>', "$config{wikistatedir}/lockfile") ||
 		error ("cannot write to $config{wikistatedir}/lockfile: $!");
-	if (! flock(WIKILOCK, 2 | 4)) { # LOCK_EX | LOCK_NB
+	if (! flock($wikilock, 2 | 4)) { # LOCK_EX | LOCK_NB
 		if ($wait) {
 			debug("wiki seems to be locked, waiting for lock");
 			my $wait=600; # arbitrary, but don't hang forever to 
 			              # prevent process pileup
 			for (1..$wait) {
-				return if flock(WIKILOCK, 2 | 4);
+				return if flock($wikilock, 2 | 4);
 				sleep 1;
 			}
 			error("wiki is locked; waited $wait seconds without lock being freed (possible stuck process or stale lock?)");
@@ -696,35 +791,40 @@ sub lockwiki (;$) { #{{{
 } #}}}
 
 sub unlockwiki () { #{{{
-	close WIKILOCK;
+	return close($wikilock) if $wikilock;
+	return;
 } #}}}
 
+my $commitlock;
+
 sub commit_hook_enabled () { #{{{
-	open(COMMITLOCK, "+>$config{wikistatedir}/commitlock") ||
-		error ("cannot write to $config{wikistatedir}/commitlock: $!");
-	if (! flock(COMMITLOCK, 1 | 4)) { # LOCK_SH | LOCK_NB to test
-		close COMMITLOCK;
+	open($commitlock, '+>', "$config{wikistatedir}/commitlock") ||
+		error("cannot write to $config{wikistatedir}/commitlock: $!");
+	if (! flock($commitlock, 1 | 4)) { # LOCK_SH | LOCK_NB to test
+		close($commitlock) || error("failed closing commitlock: $!");
 		return 0;
 	}
-	close COMMITLOCK;
+	close($commitlock) || error("failed closing commitlock: $!");
 	return 1;
 } #}}}
 
 sub disable_commit_hook () { #{{{
-	open(COMMITLOCK, ">$config{wikistatedir}/commitlock") ||
-		error ("cannot write to $config{wikistatedir}/commitlock: $!");
-	if (! flock(COMMITLOCK, 2)) { # LOCK_EX
+	open($commitlock, '>', "$config{wikistatedir}/commitlock") ||
+		error("cannot write to $config{wikistatedir}/commitlock: $!");
+	if (! flock($commitlock, 2)) { # LOCK_EX
 		error("failed to get commit lock");
 	}
+	return 1;
 } #}}}
 
 sub enable_commit_hook () { #{{{
-	close COMMITLOCK;
+	return close($commitlock) if $commitlock;
+	return;
 } #}}}
 
 sub loadindex () { #{{{
-	open (IN, "$config{wikistatedir}/index") || return;
-	while (<IN>) {
+	open (my $in, "<", "$config{wikistatedir}/index") || return;
+	while (<$in>) {
 		$_=possibly_foolish_untaint($_);
 		chomp;
 		my %items;
@@ -751,7 +851,7 @@ sub loadindex () { #{{{
 		$oldrenderedfiles{$page}=[@{$items{dest}}];
 		$pagectime{$page}=$items{ctime}[0];
 	}
-	close IN;
+	return close($in);
 } #}}}
 
 sub saveindex () { #{{{
@@ -762,7 +862,7 @@ sub saveindex () { #{{{
 	}
 	my $newfile="$config{wikistatedir}/index.new";
 	my $cleanup = sub { unlink($newfile) };
-	open (OUT, ">$newfile") || error("cannot write to $newfile: $!", $cleanup);
+	open (my $out, '>', $newfile) || error("cannot write to $newfile: $!", $cleanup);
 	foreach my $page (keys %pagemtime) {
 		next unless $pagemtime{$page};
 		my $line="mtime=$pagemtime{$page} ".
@@ -774,11 +874,13 @@ sub saveindex () { #{{{
 		if (exists $depends{$page}) {
 			$line.=" depends=".encode_entities($depends{$page}, " \t\n");
 		}
-		print OUT $line."\n" || error("failed writing to $newfile: $!", $cleanup);
+		print $out $line."\n" || error("failed writing to $newfile: $!", $cleanup);
 	}
-	close OUT || error("failed saving to $newfile: $!", $cleanup);
+	close $out || error("failed saving to $newfile: $!", $cleanup);
 	rename($newfile, "$config{wikistatedir}/index") ||
 		error("failed renaming $newfile to $config{wikistatedir}/index", $cleanup);
+	
+	return 1;
 } #}}}
 
 sub template_file ($) { #{{{
@@ -787,7 +889,7 @@ sub template_file ($) { #{{{
 	foreach my $dir ($config{templatedir}, "$installdir/share/ikiwiki/templates") {
 		return "$dir/$template" if -e "$dir/$template";
 	}
-	return undef;
+	return;
 } #}}}
 
 sub template_params (@) { #{{{
@@ -798,11 +900,10 @@ sub template_params (@) { #{{{
 		return "";
 	}
 
-	require HTML::Template;
 	my @ret=(
 		filter => sub {
 			my $text_ref = shift;
-			$$text_ref=&Encode::decode_utf8($$text_ref);
+			${$text_ref} = Encode::decode_utf8(${$text_ref});
 		},
 		filename => $filename,
 		loop_context_vars => 1,
@@ -813,7 +914,8 @@ sub template_params (@) { #{{{
 } #}}}
 
 sub template ($;@) { #{{{
-	HTML::Template->new(template_params(@_));
+	require HTML::Template;
+	return HTML::Template->new(template_params(@_));
 } #}}}
 
 sub misctemplate ($$;@) { #{{{
@@ -839,12 +941,13 @@ sub hook (@) { # {{{
 	my %param=@_;
 	
 	if (! exists $param{type} || ! ref $param{call} || ! exists $param{id}) {
-		error "hook requires type, call, and id parameters";
+		error 'hook requires type, call, and id parameters';
 	}
 
 	return if $param{no_override} && exists $hooks{$param{type}}{$param{id}};
 	
 	$hooks{$param{type}}{$param{id}}=\%param;
+	return 1;
 } # }}}
 
 sub run_hooks ($$) { # {{{
@@ -866,6 +969,8 @@ sub run_hooks ($$) { # {{{
 			$sub->($hooks{$type}{$id}{call});
 		}
 	}
+
+	return 1;
 } #}}}
 
 sub globlist_to_pagespec ($) { #{{{
@@ -881,9 +986,9 @@ sub globlist_to_pagespec ($) { #{{{
 		}
 	}
 
-	my $spec=join(" or ", @spec);
+	my $spec=join(' or ', @spec);
 	if (@skip) {
-		my $skip=join(" and ", @skip);
+		my $skip=join(' and ', @skip);
 		if (length $spec) {
 			$spec="$skip and ($spec)";
 		}
@@ -896,7 +1001,7 @@ sub globlist_to_pagespec ($) { #{{{
 
 sub is_globlist ($) { #{{{
 	my $s=shift;
-	$s=~/[^\s]+\s+([^\s]+)/ && $1 ne "and" && $1 ne "or";
+	return ( $s =~ /[^\s]+\s+([^\s]+)/ && $1 ne "and" && $1 ne "or" );
 } #}}}
 
 sub safequote ($) { #{{{
@@ -915,21 +1020,25 @@ sub add_depends ($$) { #{{{
 	else {
 		$depends{$page}=pagespec_merge($depends{$page}, $pagespec);
 	}
+
+	return 1;
 } # }}}
 
 sub file_pruned ($$) { #{{{
 	require File::Spec;
 	my $file=File::Spec->canonpath(shift);
 	my $base=File::Spec->canonpath(shift);
-	$file=~s#^\Q$base\E/*##;
+	$file =~ s#^\Q$base\E/*##;
 
 	my $regexp='('.join('|', @{$config{wiki_file_prune_regexps}}).')';
-	$file =~ m/$regexp/;
+	return $file =~ m/$regexp/;
 } #}}}
 
 sub gettext { #{{{
 	# Only use gettext in the rare cases it's needed.
-	if (exists $ENV{LANG} || exists $ENV{LC_ALL} || exists $ENV{LC_MESSAGES}) {
+	if ((exists $ENV{LANG} && length $ENV{LANG}) ||
+	    (exists $ENV{LC_ALL} && length $ENV{LC_ALL}) ||
+	    (exists $ENV{LC_MESSAGES} && length $ENV{LC_MESSAGES})) {
 		if (! $gettext_obj) {
 			$gettext_obj=eval q{
 				use Locale::gettext q{textdomain};
@@ -977,23 +1086,37 @@ sub pagespec_translate ($) { #{{{
 
 	# Convert spec to perl code.
 	my $code="";
-	while ($spec=~m/\s*(\!|\(|\)|\w+\([^\)]+\)|[^\s()]+)\s*/ig) {
+	while ($spec=~m{
+		\s*		# ignore whitespace
+		(		# 1: match a single word
+			\!		# !
+		|
+			\(		# (
+		|
+			\)		# )
+		|
+			\w+\([^\)]*\)	# command(params)
+		|
+			[^\s()]+	# any other text
+		)
+		\s*		# ignore whitespace
+	}igx) {
 		my $word=$1;
-		if (lc $word eq "and") {
-			$code.=" &&";
+		if (lc $word eq 'and') {
+			$code.=' &&';
 		}
-		elsif (lc $word eq "or") {
-			$code.=" ||";
+		elsif (lc $word eq 'or') {
+			$code.=' ||';
 		}
 		elsif ($word eq "(" || $word eq ")" || $word eq "!") {
-			$code.=" ".$word;
+			$code.=' '.$word;
 		}
 		elsif ($word =~ /^(\w+)\((.*)\)$/) {
 			if (exists $IkiWiki::PageSpec::{"match_$1"}) {
 				$code.="IkiWiki::PageSpec::match_$1(\$page, ".safequote($2).", \@params)";
 			}
 			else {
-				$code.=" 0";
+				$code.=' 0';
 			}
 		}
 		else {
@@ -1011,11 +1134,11 @@ sub pagespec_match ($$;@) { #{{{
 
 	# Backwards compatability with old calling convention.
 	if (@params == 1) {
-		unshift @params, "location";
+		unshift @params, 'location';
 	}
 
 	my $ret=eval pagespec_translate($spec);
-	return IkiWiki::FailReason->new("syntax error") if $@;
+	return IkiWiki::FailReason->new('syntax error') if $@;
 	return $ret;
 } #}}}
 
@@ -1029,7 +1152,7 @@ use overload ( #{{{
 ); #}}}
 
 sub new { #{{{
-	bless \$_[1], $_[0];
+	return bless \$_[1], $_[0];
 } #}}}
 
 package IkiWiki::SuccessReason;
@@ -1042,7 +1165,7 @@ use overload ( #{{{
 ); #}}}
 
 sub new { #{{{
-	bless \$_[1], $_[0];
+	return bless \$_[1], $_[0];
 }; #}}}
 
 package IkiWiki::PageSpec;
@@ -1052,7 +1175,7 @@ sub match_glob ($$;@) { #{{{
 	my $glob=shift;
 	my %params=@_;
 	
-	my $from=exists $params{location} ? $params{location} : "";
+	my $from=exists $params{location} ? $params{location} : '';
 	
 	# relative matching
 	if ($glob =~ m!^\./!) {
@@ -1079,7 +1202,7 @@ sub match_link ($$;@) { #{{{
 	my $link=lc(shift);
 	my %params=@_;
 
-	my $from=exists $params{location} ? $params{location} : "";
+	my $from=exists $params{location} ? $params{location} : '';
 
 	# relative matching
 	if ($link =~ m!^\.! && defined $from) {
@@ -1088,10 +1211,10 @@ sub match_link ($$;@) { #{{{
 		$link="$from/$link" if length $from;
 	}
 
-	my $links = $IkiWiki::links{$page} or return undef;
-	return IkiWiki::FailReason->new("$page has no links") unless @$links;
+	my $links = $IkiWiki::links{$page};
+	return IkiWiki::FailReason->new("$page has no links") unless $links && @{$links};
 	my $bestlink = IkiWiki::bestlink($from, $link);
-	foreach my $p (@$links) {
+	foreach my $p (@{$links}) {
 		if (length $bestlink) {
 			return IkiWiki::SuccessReason->new("$page links to $link")
 				if $bestlink eq IkiWiki::bestlink($page, $p);
@@ -1105,7 +1228,7 @@ sub match_link ($$;@) { #{{{
 } #}}}
 
 sub match_backlink ($$;@) { #{{{
-	match_link($_[1], $_[0], @_);
+	return match_link($_[1], $_[0], @_);
 } #}}}
 
 sub match_created_before ($$;@) { #{{{
@@ -1114,10 +1237,10 @@ sub match_created_before ($$;@) { #{{{
 
 	if (exists $IkiWiki::pagectime{$testpage}) {
 		if ($IkiWiki::pagectime{$page} < $IkiWiki::pagectime{$testpage}) {
-			IkiWiki::SuccessReason->new("$page created before $testpage");
+			return IkiWiki::SuccessReason->new("$page created before $testpage");
 		}
 		else {
-			IkiWiki::FailReason->new("$page not created before $testpage");
+			return IkiWiki::FailReason->new("$page not created before $testpage");
 		}
 	}
 	else {
@@ -1131,10 +1254,10 @@ sub match_created_after ($$;@) { #{{{
 
 	if (exists $IkiWiki::pagectime{$testpage}) {
 		if ($IkiWiki::pagectime{$page} > $IkiWiki::pagectime{$testpage}) {
-			IkiWiki::SuccessReason->new("$page created after $testpage");
+			return IkiWiki::SuccessReason->new("$page created after $testpage");
 		}
 		else {
-			IkiWiki::FailReason->new("$page not created after $testpage");
+			return IkiWiki::FailReason->new("$page not created after $testpage");
 		}
 	}
 	else {
@@ -1144,28 +1267,28 @@ sub match_created_after ($$;@) { #{{{
 
 sub match_creation_day ($$;@) { #{{{
 	if ((gmtime($IkiWiki::pagectime{shift()}))[3] == shift) {
-		return IkiWiki::SuccessReason->new("creation_day matched");
+		return IkiWiki::SuccessReason->new('creation_day matched');
 	}
 	else {
-		return IkiWiki::FailReason->new("creation_day did not match");
+		return IkiWiki::FailReason->new('creation_day did not match');
 	}
 } #}}}
 
 sub match_creation_month ($$;@) { #{{{
 	if ((gmtime($IkiWiki::pagectime{shift()}))[4] + 1 == shift) {
-		return IkiWiki::SuccessReason->new("creation_month matched");
+		return IkiWiki::SuccessReason->new('creation_month matched');
 	}
 	else {
-		return IkiWiki::FailReason->new("creation_month did not match");
+		return IkiWiki::FailReason->new('creation_month did not match');
 	}
 } #}}}
 
 sub match_creation_year ($$;@) { #{{{
 	if ((gmtime($IkiWiki::pagectime{shift()}))[5] + 1900 == shift) {
-		return IkiWiki::SuccessReason->new("creation_year matched");
+		return IkiWiki::SuccessReason->new('creation_year matched');
 	}
 	else {
-		return IkiWiki::FailReason->new("creation_year did not match");
+		return IkiWiki::FailReason->new('creation_year did not match');
 	}
 } #}}}
 
@@ -1174,7 +1297,8 @@ sub match_user ($$;@) { #{{{
 	my $user=shift;
 	my %params=@_;
 
-	return IkiWiki::FailReason->new("cannot match user") unless exists $params{user};
+	return IkiWiki::FailReason->new('cannot match user')
+		unless exists $params{user};
 	if ($user eq $params{user}) {
 		return IkiWiki::SuccessReason->new("user is $user")
 	}