_magnum_opts="" # lazy init
_magnum_flags="" # lazy init
_magnum_opts_exp="" # lazy init
_magnum()
{
        local cur prev nbc cflags
        COMPREPLY=()
        cur="${COMP_WORDS[COMP_CWORD]}"
        prev="${COMP_WORDS[COMP_CWORD-1]}"

        if [ "x$_magnum_opts" == "x" ] ; then
                nbc="`magnum bash-completion | sed -e "s/  *-h  */ /" -e "s/  *-i  */ /"`"
                _magnum_opts="`echo "$nbc" | sed -e "s/--[a-z0-9_-]*//g" -e "s/  */ /g"`"
                _magnum_flags="`echo " $nbc" | sed -e "s/ [^-][^-][a-z0-9_-]*//g" -e "s/  */ /g"`"
                _magnum_opts_exp="`echo "$_magnum_opts" | tr ' ' '|'`"
        fi

        if [[ " ${COMP_WORDS[@]} " =~ " "($_magnum_opts_exp)" " && "$prev" != "help" ]] ; then
                COMPLETION_CACHE=~/.magnumclient/*/*-cache
                cflags="$_magnum_flags "$(cat $COMPLETION_CACHE 2> /dev/null | tr '\n' ' ')
                COMPREPLY=($(compgen -W "${cflags}" -- ${cur}))
        else
                COMPREPLY=($(compgen -W "${_magnum_opts}" -- ${cur}))
        fi
        return 0
}
complete -F _magnum magnum