Terraform Version Switcher for MacOS

use-terraform.sh

#!/bin/bash

#######################################
# Terraform version switcher for MacOS
# Usage: use-terraform 0.12.29
#######################################

set -e

die () {
    echo >&2 "$@"
    exit 1
}

[ "$#" -eq 1 ] || die "1 argument required, $# provided"

version=$1
remote_file=terraform_${version}_darwin_amd64.zip
remote_path=https://releases.hashicorp.com/terraform/$version/${remote_file}
local_versioned_bin_path=/usr/local/bin/terraform-v${version}
local_bin_path=/usr/local/bin/terraform
local_tmp_path=/tmp/${remote_file}

if [ ! -f ${local_versioned_bin_path} ]; then
  echo "Downloading ${remote_path} 🚚"
  curl ${remote_path} > ${local_tmp_path}
  unzip -p ${local_tmp_path} > ${local_versioned_bin_path}
  echo "Unarchiving to ${local_versioned_bin_path} 🎁"
  chmod +x ${local_versioned_bin_path}
fi

if [ -f ${local_bin_path} ]; then
  rm ${local_bin_path}
fi

cp ${local_versioned_bin_path} ${local_bin_path}
echo "Copied ${local_versioned_bin_path} to ${local_bin_path}. Done ✅"