dot-bashrc set kubernetes kubeconfig on login

dotbashrc.sh

#!/bin/bash
# add this to users .bashrc file -- remove the #!/bin/bash
#
# script that prompts user on login to select a kubernetes cluster as their current
#
#   - we set an alias for kubectl which is kubectl --kubeconfig=<some config>
#   - we create a different kubeconfig file in .kube for each context
#

declare -a KUBE_CONFIG_FILES

# these are filenames in ~/.kube -- make 'em descriptive -- change to match your files in ~/.kube
KUBE_CONFIG_FILES[1]="dev-cluster-kubeconfig"
KUBE_CONFIG_FILES[2]="int-cluster-kubeconfig"
KUBE_CONFIG_FILES[3]="prod-cluster-kubeconfig"

# I put this in here to FORCE it
# kubectl without choosing will FAIL
rm ~/.kube/config

# lock 'em in until they choose or ctrl-C out (breaking kubectl for them)
while :
do
  echo "Please Choose Kubernetes Cluster"
  for i in "${!KUBE_CONFIG_FILES[@]}"; do
    echo "${i}) ${KUBE_CONFIG_FILES[$i]}"
  done
  echo
  echo "Please select [1 - ${#KUBE_CONFIG_FILES[@]}]"
  echo

  read clusterchoice

  if [ "$clusterchoice" -ge 1 -a "$clusterchoice" -le ${#KUBE_CONFIG_FILES[@]} ];then
    break
  fi
done

alias kubectl="/usr/local/bin/kubectl --kubeconfig=${HOME}/.kube/${KUBE_CONFIG_FILES[${clusterchoice}]}"