class RuboCop::CLI::Command::AutoGenerateConfig

def run_line_length_cop

parameter.
depend on Layout/LineLength:Max get the correct value for that
Do an initial run with only Layout/LineLength so that cops that

def run_line_length_cop
  puts Rainbow(PHASE_1).yellow
  @options[:only] = ['Layout/LineLength']
  execute_runner
  @options.delete(:only)
  @config_store = ConfigStore.new
  # Save the todo configuration of the LineLength cop.
  IO.read(AUTO_GENERATED_FILE)
    .lines
    .drop_while { |line| line.start_with?('#') }
    .join
end

Instance Methods