Enviable - Robust environment variable conversion

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I just released Enviable v1.5, which is mostly a bugfix release, but added a couple of minor features.

I’m not sure when (or if) Enviable 2 will be released, but when it does, the default behaviour of boolean conversion will be to be case-insensitive. To make that transition easier, I added a compile-time option (:enviable, :boolean_downcase) that can be set to :default to match the eventual default and keep your fetch_env_as_boolean! calls simpler).

Although get_env_as_json and related functions documented that the default engine could be configured with :enviable, :json_engine, the code supporting that was incorrect in two ways: it was being evaluated at runtime, not at compile time, and it was using :enviable, :json instead of :enviable, :json_engine. This has been fixed and specifying the JSON engine now allows for an MFA tuple either as a parameter or as a compile configuration.

Changelog

  • Fixed a bug with list conversion for get_env_as_list and get_env_as where support for a :default value was not included.

  • Fixed a bug with :downcase conversions and nil values.

  • Added a compile-time configuration option to change the default boolean :downcase option. The default value is currently false (do not downcase). The next major version of Enviable will change this to :default, as it should not matter whether the matched value is true, TRUE, or True for boolean tests.

  • Added :upcase option to atom and safe_atom conversions.

  • Fixed :json_engine configuration so that it is properly compile-time and referenced. The JSON parsing code was looking this up at runtime under the wrong key.

  • Added support for {m, f, a} specification for :json_engine configuration or the :engine parameter for JSON conversion.

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