upgrade-terraform.sh

#!/bin/bash

set -u

LATEST_RELEASE=$(curl https://api.github.com/repos/hashicorp/terraform/releases/latest | jq --raw-output '.tag_name' | cut -c 2-)
CURRENT_RELEASE=$(terraform version | grep -oP 'Terraform v\K[\d\.]+')
if [ "${LATEST_RELEASE}" == "${CURRENT_RELEASE}" ]; then
   echo "Latest Terraform already installed."
   exit 0
fi

echo "Installing Terraform ${LATEST_RELEASE}..."
TMPDIR=$(mktemp -d --suffix=.tf-update)
cd $TMPDIR
curl --output terraform.zip https://releases.hashicorp.com/terraform/${LATEST_RELEASE}/terraform_${LATEST_RELEASE}_linux_amd64.zip
unzip terraform.zip
sudo mv terraform /usr/local/bin/
rm -rf $TMPDIR