ZSH function for switching ec2 regions

region.zsh

region () {
  local _uri
  if [[ ! -f ~/.ec2-regions || =ec2-describe-regions -nt ~/.ec2-regions ]]; then
    ec2-describe-regions > ~/.ec2-regions
  fi
  _uri=$(awk -v region="${1}" '$0 ~ region { print $NF }' ~/.ec2-regions)
  if [[ -n "${_uri}" ]]; then
    eval "export EC2_URL=https://${_uri}"
  else
    echo "region \"${1}\" not found" >&2
  fi
}