gistfile1.txt

require "logger"

module MyLogger
  def self.logger
    @logger ||= setup_logger
  end

  def self.setup_logger
    log = Logging.logger.new("test")
    log.level = :info
    log.add_appenders(
      Logging.appenders.stdout,
      Logging.appenders.file("test.log")
    )
    log
  end

  def self.info(message)
    logger.info(message)
  end
end

module Test
  extend MyLogger

  def self.hello
    info "hello"
  end
end

Test.hello