#!/bin/bash -e

# Copyright 2018 Google LLC
#
# 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
#
#     https://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.

# "---------------------------------------------------------"
# "-                                                       -"
# "-  Common commands for all scripts                      -"
# "-                                                       -"
# "---------------------------------------------------------"

# gcloud and kubectl are required for this POC
command -v gcloud >/dev/null 2>&1 || { \
 echo >&2 "I require gcloud but it's not installed.  Aborting."; exit 1; }

command -v kubectl >/dev/null 2>&1 || { \
 echo >&2 "I require kubectl but it's not installed.  Aborting."; exit 1; }

# Get the default zone and use it or die
ZONE=$(gcloud config get-value compute/zone)
if [ -z "${ZONE}" ]; then
    echo "gcloud cli must be configured with a default zone." 1>&2
    echo "run 'gcloud config set compute/zone ZONE'." 1>&2
    echo "replace 'ZONE' with the zone name like us-west1-a." 1>&2
    exit 1;
fi

#Get the default region and use it or die
REGION=$(gcloud config get-value compute/region)
if [ -z "${REGION}" ]; then
    echo "gcloud cli must be configured with a default region." 1>&2
    echo "run 'gcloud config set compute/region REGION'." 1>&2
    echo "replace 'REGION' with the region name like us-west1." 1>&2
    exit 1;
fi
