require "logger"

module GLogger
  SIZE_1_MB = 1048576

  def initialize_logger log_file
    return unless log_file
    @logger =
      if log_file == "-"
        Logger.new($stdout)
      else
        Logger.new(log_file, 1, SIZE_1_MB)
      end
    @logger.datetime_format = "%Y-%m-%d %H:%M:%S "
  end

  def log text
    @logger.info(text) if @logger
  end

  def log_error text
    @logger.error(text) if @logger
  end
end