#!/usr/bin/env bash

# Copyright 2020 The WebRoot, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# This is based on existing work:
# https://github.com/morvencao/kube-mutating-webhook-tutorial/blob/master/deployment/webhook-patch-ca-bundle.sh

ROOT=$(cd $(dirname $0)/../../; pwd)

set -o errexit
set -o nounset
set -o pipefail

export CA_BUNDLE=$(kubectl get configmap -n kube-system extension-apiserver-authentication -o=jsonpath='{.data.client-ca-file}' | base64 | tr -d '\n')

if command -v envsubst >/dev/null 2>&1; then
    envsubst
else
    sed -e "s|==CA_BUNDLE==|${CA_BUNDLE}|g"
fi