dry-system collapse directory

Support dry-system
1

How does one go about using dry-system with or without Zeitwerk to collapse directories?

2

Directory collapsing is a standard feature of zeitwerk, so you need to define your own loader.

require "bundler/setup"
require "dry/system/container"
require "zeitwerk"

module Bookshelf
  # Adapt zeitwerk inflector interface to dry-inflector
  class Inflector
    def camelize(basename, _abspath)
      Application.inflector.camelize(basename)
    end
  end

  def self.autoloader
    @autoloader ||= Zeitwerk::Loader.new.tap do |loader|
      loader.inflector = Inflector.new
      loader.push_dir Application.config.root.join("app").realpath, namespace: Bookshelf
      # configuration for collapsed directories goes here
      loader.enable_reloading
      loader.setup
    end
  end

  class Application < Dry::System::Container
    configure do |config|
      require "dry/inflector"

      config.root = Pathname(__dir__).parent.expand_path
      config.inflector = Dry::Inflector.new
    end

    def self.inflector = config.inflector

    use :zeitwerk, loader: Bookshelf.autoloader
  end
end

The order of operations to make sure things get initialized in the right order is a little tricky. This is adapted from how I did it.

It is important that your inflector is initialized first before the autoloader. This allows you to configure acronyms for your constants.