Eager load application classes

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# Eager load application classes
def load_application_classes
  return if $rails_rake_task
  if configuration.cache_classes
    configuration.eager_load_paths.each do |load_path|
      matcher = /\A#{Regexp.escape(load_path)}(.*)\.rb\Z/
      Dir.glob("#{load_path}/**/*.rb").sort.each do |file|
        require_dependency file.sub(matcher, '\1')
      end
    end
  end
end