mpx

defmodule Mpx.Config do
  @moduledoc """
  Catch all module to hold config functions
  """

  @doc """
  Given the result of the configuration, convert it to the actual value.
  It mainly exists to support `{:system, ENV_VAR}` values.
  """
  @spec from_config(atom(), term() | nil) :: no_return | String.t
  def from_config(config_param, nil), do: raise "#{config_param} is a required configuration parameter"
  def from_config(config_param, {:system, env_var}), do: from_config(config_param, System.get_env(env_var))
  def from_config(_config_param, any_val), do: any_val
end