message: Return error code on failure
diff: @@ -36,7 +36,7 @@ function abort_if_var_unset {
  var_value=${2}
  if [[ ! -n ${var_value} ]]; then
  prompt_msg "Error ${var_name} not set. Aborting"
  - exit 0
  + exit 1
  fi
  echo ${var_name} set to ${var_value}
  }
  