# File lib/railroad/controllers_diagram.rb, line 19
  def generate
    STDERR.print "Generating controllers diagram\n" if @options.verbose

    files = Dir.glob("app/controllers/**/*_controller.rb") - @options.exclude
    files << 'app/controllers/application.rb'
    files.each do |f|
      class_name = extract_class_name(f)
      # ApplicationController's file is 'application.rb'
      class_name += 'Controller' if class_name == 'Application'
      process_class class_name.constantize
    end 
  end