Switch between kubectl contexts

kctx

kctx() {
	local CLUSTER_NAME=${1}
	if [[ -z $CLUSTER_NAME ]]; then
		local OPTIONS=$(kubectl config get-contexts -o name)
		OPTIONS+=' EXIT'

		local CTX=$(kubectl config current-context)
		local NS=$(kubectl config view -o jsonpath="{.contexts[?(@.name=='$CTX')].context.namespace}")
		if [[ -z $NS ]]; then
			NS="default"
		fi

		echo "Current ctx/ns: $CTX/$NS"
		echo "Switch to which context? (or EXIT)"

		select opt in $OPTIONS; do
			if [ "$opt" = "EXIT" ]; then
				echo "Staying in the current context"
			else
				kubectl config use-context "$opt"
			fi
			break
		done
	else
		kubectl config use-context "$CLUSTER_NAME"
	fi
	CTX=$(kubectl config current-context)
	NS=$(kubectl config view -o jsonpath="{.contexts[?(@.name=='$CTX')].context.namespace}")
	if [[ -z $NS ]]; then
		NS="default"
	fi
	echo "Current ctx/ns: $CTX/$NS"
}