dialog to change current kubectl context

chcluster.sh

#!/bin/bash

set -e

selected=$(
    dialog --radiolist "Choose cluster" 0 0 0 $(
        kubectl config get-contexts | sed -e 's/^ /off/' -e 's/^\*/on/' -e 1d | awk '{print $2,$3,$1 }'
    ) 2>&1 > /dev/tty 
)

if [ "x${selected}" != "x" ]; then
    echo Changing to context ${selected}
    kubectl config use-context ${selected}
fi