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lambda_base

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Base library to create Elixir AWS Lambda

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lambda_base lib lambda_base util lambda_config.ex
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lib/lambda_base/util/lambda_config.ex 

defmodule LambdaBase.Util.LambdaConfig do

  @moduledoc """

  A Config for AWS Lambda.



  store `config/release.exs`

  """



  use Agent



  @type on_start() :: {:ok, pid()} | {:error, {:already_started, pid()} | term()}

  @external_resource config_file = "../../config/lambda.exs"

  config = if (File.exists?(config_file)), do: Config.Reader.read!(config_file), else: []



  @doc """

  Start Config.



  """

  @spec start_link() :: on_start()

  def start_link(), do: start_link([])

  def start_link(_initial_value) do

    Agent.start_link(fn -> unquote(config) end, name: __MODULE__)

  end



  @doc """

  Get configration.

  """

  def get(keys), do: get(keys, nil)

  def get(keys, default), do: Agent.get(__MODULE__, & &1) |> get_value(keys, default)



  defp get_value(nil, _, default), do: default

  defp get_value(config, [], _default), do: config

  defp get_value(config, [key | keys], default), do: get_value(config |> Keyword.get(key), keys, default)

end