leave networking alone on 'weave launch' unless we start container

weaver/weave

@@ -117,15 +117,6 @@ case "$COMMAND" in
         [ $# -gt 0 ] || usage
         IPADDR=$1
         shift 1
-        create_bridge
-        setup_masquerading $IPADDR
-        # We set the router name to the bridge mac since that is
-        # stable across re-creations of the containers.
-        #
-        # TODO use the mac of one of the physical host interfaces
-        # (eth0, wlan0, etc) so the name becomes stable across host
-        # restarts.
-        MACADDR=`cat /sys/class/net/$BRIDGE/address`
         case $(docker inspect --format '{{ .State.Running }} {{ .Config.Image }}' weave 2>/dev/null) in
             "true zettio/weave")
                 echo "Weave is already running." >&2
@@ -143,6 +134,15 @@ case "$COMMAND" in
                 exit 1
                 ;;
         esac
+        create_bridge
+        setup_masquerading $IPADDR
+        # We set the router name to the bridge mac since that is
+        # stable across re-creations of the containers.
+        #
+        # TODO use the mac of one of the physical host interfaces
+        # (eth0, wlan0, etc) so the name becomes stable across host
+        # restarts.
+        MACADDR=`cat /sys/class/net/$BRIDGE/address`
         CONTAINER=$(docker run --privileged -d --name=weave -p 6783:6783/tcp -p 6783:6783/udp $WEAVE_DOCKER_ARGS zettio/weave -name $MACADDR "$@")
         configure_container_networking $CONTAINER $IPADDR eth0
         echo $CONTAINER