Convenient helper to load application middleware into Rails

config initializers middleware.rb

# frozen_string_literal: true

# Convenient helper to load application middleware into Rails.
#
# @example app/middleware/health_middleware.rb
#   class HealthMiddleware; end
#
Pathname.glob(Rails.root.join("app/middleware/*.rb")).each do |path|
  require path

  # Unfold the path into something useful.
  middleware = path.basename(path.extname).to_path.classify.constantize

  Rails.configuration.middleware.use(middleware)
end