#!/bin/bash

set -xeou pipefail

KUBECTL_VERSION=${1}
KUBECTL_DOWNLOAD_URL="https://dl.k8s.io/release/v${KUBECTL_VERSION}/bin/linux/amd64"

apt-get update
apt-get -y install curl

curl -fsSL "${KUBECTL_DOWNLOAD_URL}/kubectl" -o kubectl
curl -fsSL "${KUBECTL_DOWNLOAD_URL}/kubectl.sha256" -o kubectl.sha256
echo "$(cat kubectl.sha256)  kubectl" | sha256sum -c -

chmod +x kubectl
mv kubectl /usr/local/bin/kubectl

rm kubectl.sha256
apt-get -yq autoremove
apt-get clean -yqq
rm -rf /var/lib/apt/lists/*