Quick and dirty Elixir .env file loader

env_loader.ex

defmodule EnvLoader do
  def load_env_file!, do: get_env_file() |> set_file_env_vars()

  defp set_file_env_vars(nil), do: :ok

  defp set_file_env_vars(file_name) do
    File.read!(file_name)
    |> String.split()
    |> Enum.map(fn kvp -> String.split(kvp, "=") |> List.to_tuple() end)
    |> System.put_env()
  end

  defp get_env_file do
    File.ls!()
    |> Enum.find(fn file_name ->
      case Mix.env() do
        :prod -> String.equivalent?(file_name, ".env")
        env -> String.equivalent?(file_name, ".env.#{env}")
      end
    end)
  end
end