#!/bin/bash

LAST=/tmp/last_kube_context
CURR="$(kubectl config current-context)"
[[ -z "$1" ]] && kubectl config get-contexts && exit
[ ! -f $LAST ] && echo "$CURR" >$LAST
[[ "$1" == "-" ]] && USE="$(cat $LAST)" || USE="$1"
[[ "$CURR" != "$USE" ]] && echo "$CURR" >$LAST
kubectl config use-context "$USE"