Angostura Dependency Gem

Angostura adds an easy way to setup component dependencies inspired by rails engine setup guides.

Angostura expands upon the basic idea of using a mattr_accessor adding validation to ensure using stringified class names during setup, ensure that dependencies were set, and provide default values.

The simplest usage just sets a few dependencies by including angostura and using the dependendency hook with an arg or two.

module GreatComponent
  include Angostura::Dependencies

  dependency :user, :authorizer
end

With this GreatComponent now responds to GreatComponent.user returning the setup string and GreatComponent.user_class returning the class object.

GreatComponent also now has an available setup method to be used in an initializer.

GreatComponent.setup do |config|
  config.user = 'PoorChoices'
end

Config expects stringified class names, angostura will dynamically define a dependency_class method for you which returns the constantized class.

The dependency hook also allows you to set defaults for the dependency by passing keyword arguments. For example dependency :house, car: 'Mazerati', a dependency with a default can still of course be overriden in the setup block.