Automatic terraform upgrade

terraform-upgrade.sh

#!/usr/bin/env bash

# Upgrade an existing terraform installation.

currentVersion=$(terraform version | head -n1 | awk '{print $2}' | cut -c 2-)
installPath=$(which terraform)

echo "Checking latest release..."
LATEST_RELEASE=$(curl -# https://api.github.com/repos/hashicorp/terraform/releases/latest | jq --raw-output '.tag_name' | cut -c 2-)

if [ "$LATEST_RELEASE" == "$currentVersion" ]; then
    echo "Latest Terraform already installed."
else
    echo "Upgrading to Terraform ${LATEST_RELEASE}..."
    wget https://releases.hashicorp.com/terraform/${LATEST_RELEASE}/terraform_${LATEST_RELEASE}_linux_amd64.zip
    unzip terraform_${LATEST_RELEASE}_linux_amd64.zip
    mv terraform $installPath
    rm terraform_${LATEST_RELEASE}_linux_amd64.zip
fi