Config initializers allow you to hook early into the Lono boot process. This provides a way of customizing Lono beyond the config/app.rb options. Generally, recommend using config options when possible and reaching for config initializers for advanced usage.

Here’s a simple example:


Lono::Layering.module_eval do
  def pre_layers

This example customizes Lono layering processing. More info: Custom Layering.

Config initializers are a generalized system, so the way you use it really depends on what you’re trying to do.