gistfile1.txt

#!/bin/bash

set -e

if [ "$#" -lt 4 ]; then
    >&2 echo "Not all expected arguments set."
    exit 1
fi

PROJECT_ID=$1
CREDENTIALS=$2
LOCATION=$3
CLUSTER_NAME=$4

shift 4

export CLOUDSDK_AUTH_CREDENTIAL_FILE_OVERRIDE=$CREDENTIALS

RANDOM_ID="${RANDOM}_${RANDOM}"
export TMPDIR="/tmp/kube_auth_wrapper_${CLUSTER_NAME}_${RANDOM_ID}"

function cleanup {
    rm -rf ${TMPDIR}
    echo "CLEANUP"
}
trap cleanup EXIT

mkdir ${TMPDIR}

export KUBECONFIG="${TMPDIR}/config"

gcloud --project="${PROJECT_ID}" container clusters --zone="${LOCATION}" get-credentials ${CLUSTER_NAME}

"$@"