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snakebridge

0.8.0
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Compile-time generator for type-safe Elixir bindings to Python libraries

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snakebridge lib snakebridge script_options.ex
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lib/snakebridge/script_options.ex 

defmodule SnakeBridge.ScriptOptions do

  @moduledoc false



  @legacy_truthy ["1", "true", "yes", "y", "on"]



  @spec resolve(keyword(), map()) :: keyword()

  def resolve(opts, env \\ System.get_env()) when is_list(opts) and is_map(env) do

    opts

    |> maybe_put_exit_mode(env)

    |> Keyword.put_new(:stop_mode, :if_started)

  end



  defp maybe_put_exit_mode(opts, env) do

    cond do

      Keyword.has_key?(opts, :exit_mode) ->

        opts



      Keyword.has_key?(opts, :halt) ->

        opts



      exit_env_set?(env) ->

        opts



      true ->

        Keyword.put(opts, :exit_mode, :auto)

    end

  end



  defp exit_env_set?(env) do

    case Map.get(env, "SNAKEPIT_SCRIPT_EXIT") do

      nil ->

        legacy_halt_truthy?(env)



      value ->

        String.trim(value) != ""

    end

  end



  defp legacy_halt_truthy?(env) do

    case Map.get(env, "SNAKEPIT_SCRIPT_HALT") do

      nil -> false

      value -> String.downcase(String.trim(value)) in @legacy_truthy

    end

  end

end