class Middleman::CoreExtensions::ExternalHelpers

def after_configuration
  helpers_path = File.join(app.root, app.config[:helpers_dir])
  return unless File.exist?(helpers_path)
  glob = File.join(helpers_path, app.config[:helpers_filename_glob])
  ::Middleman::Util.glob_directory(glob).each do |filename|
    module_name = app.config[:helpers_filename_to_module_name_proc].call(filename)
    next unless module_name
    require filename
    next unless Object.const_defined?(module_name.to_sym)
    app.template_context_class.send :include, Object.const_get(module_name.to_sym)
  end
end