class Puma::DSL

def warn_if_in_single_mode(hook_name)
  return if @options[:silence_fork_callback_warning]
  # user_options (CLI) have precedence over config file
  workers_val = @config.options.user_options[:workers] || @options[:workers] ||
    @config.puma_default_options[:workers] || 0
  if workers_val == 0
    log_string =
      "Warning: You specified code to run in a `#{hook_name}` block, " \
      "but Puma is not configured to run in cluster mode (worker count > 0 ), " \
      "so your `#{hook_name}` block did not run"
    LogWriter.stdio.log(log_string)
  end
end