oh-my-zsh/plugins/kube/kube.plugin.zsh

export KUBE_HOME=~/.kube

function kgp {
  echo $KUBECONFIG
}

function ksp {
  local rprompt=${RPROMPT/<k8s:$(kgp)>/}

  export KUBE_PROFILE=$1
  export KUBECONFIG=$KUBE_HOME/$1-config

  export RPROMPT="<kube:$KUBE_PROFILE>$rprompt"
}

function kube_profiles {
  reply=($(ls $KUBE_HOME/*-config |
	       awk -F'/' '{print $5}' |
	       sed "s/-config$/ /g" |
	       tr -d '\n'))
}

compctl -K kube_profiles ksp