function menu {
    if [ "${1}" ] ; then
        menu_load "${1}" "${menus}/${1}.sh"
    else
        menu_load 'main' "${menus}/main.sh"
    fi
}

function menu_color {
    menu_item \
    'black'     'blue'          'green'       'cyan' \
    'red'       'magenta'       'brown'       'light-gray' \
    'dark-gray' 'light-blue'    'light-green' 'light-cyan' \
    'light-red' 'light-magenta' 'yellow'      'white'
}

function menu_init {
    if [ "${1}" ] ; then
        menuentry "→ ${menu} → ${1}" { nop }
    else
        menuentry "→ ${menu}" { nop }
    fi
    menu_split
    default=2
}

function menu_item {
    eval "default=\"id_\${${menu}}\""
    for item in "${@}" ; do
        menuentry "${item}" "${menu}" --id "id_${item}" {
            eval "${2}=\"${1}\""
            menu
        }
    done
    unset item
}

function menu_load {
    menu="${1}"
    export menu nav
    # env_export
    var_export
    configfile "${2}"
}

function menu_split {
    menuentry '' { nop }
}