_aufs_n_command(){ 
    COMPREPLY=()
    _get_comp_words_by_ref cur prev words cword
	if [[ "$cword" = 1 ]] ; then
		COMPREPLY=( $(compgen -W '--raw --help' -- ${cur}) )
    elif echo ${words[@]} |grep '\-\-raw' ; then
		COMPREPLY=( $(compgen -W '\$bundle \$source \$n \$bname_source \$dname_source \$bname_bundle \$dname_bundle' -- ${cur}) ) 
    fi
}
complete -F _aufs_n_command aufs-n
