module OS
  def OS.windows?
    (/cygwin|mswin|mingw|bccwin|wince|emx/ =~ RUBY_PLATFORM) != nil
  end

  def OS.mac?
    (/darwin/ =~ RUBY_PLATFORM) != nil
  end

  def OS.unix?
    !OS.windows?
  end

  def OS.linux?
    OS.unix? and not OS.mac?
  end

  def OS.debian?
    linux? and os_name_debian?
  end

  def self.os_name_debian?
    os_name = 'not_found'
    file_name = '/etc/os-release'
    if File.exist?(file_name)
      File.foreach(file_name).each do |line|
        if line.start_with?('ID=')
          os_name = line.split('=')[1].strip
        end
      end
    else
      logger.info('Unknown linux distribution detected')
    end
    os_name == 'debian' ? true : false
  rescue StandardError => e
    log.error "Unable to detect debian platform due to: #{e.message}"
    false
  end
end