systemd-systemctl-native: handle ALIAS tag

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>

meta-systemd/recipes-core/systemd/systemd-systemctl-native/systemctl

@@ -96,6 +96,23 @@ for service in $services; do
 		fi
 	done
 
+	# create the required symbolic 'Alias' links
+	alias=$(grep Alias $ROOT/$service_file \
+		        | sed 's,Alias=,,g' \
+		        | tr ',' '\n' \
+		        | grep '\.service$')
+
+	for r in $alias; do
+		if [ "$action" = "enable" ]; then
+			mkdir -p $ROOT/etc/systemd/system
+			ln -s $service_file $ROOT/etc/systemd/system/$r
+			echo "Enabled $service for $alias."
+		else
+			rm -f $ROOT/etc/systemd/system/$r
+			echo "Disabled $service for $alias."
+		fi
+	done
+
 	# call us for the other required scripts
 	also=$(grep Also $ROOT/$service_file \
 		   | sed 's,Also=,,g' \