Class: MacWifi::Main

Inherits:
Object
  • Object
show all
Defined in:
lib/mac-wifi/main.rb

Instance Method Summary collapse

Instance Method Details

#assert_os_is_mac_os ⇒ Object 



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# File 'lib/mac-wifi/main.rb', line 12

def assert_os_is_mac_os
  host_os = RbConfig::CONFIG["host_os"]
  unless /darwin/.match(host_os)  # e.g. "darwin16.4.0"
    raise "This program currently works only on Mac OS. Platform is '#{host_os}'."
  end
end

#call ⇒ Object 



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# File 'lib/mac-wifi/main.rb', line 61

def call
  assert_os_is_mac_os

  options = parse_command_line

  MacWifi::CommandLineInterface.new(options).call
end

#parse_command_line ⇒ Object

Parses the command line with Ruby’s internal ‘optparse’. Looks for “-v” flag to set verbosity to true. optparse removes what it processes from ARGV, which simplifies our command parsing.



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# File 'lib/mac-wifi/main.rb', line 23

def parse_command_line
  options = OpenStruct.new
  OptionParser.new do |parser|
    parser.on("-v", "--[no-]verbose", "Run verbosely") do |v|
      options.verbose = v
    end

    parser.on("-s", "--shell", "Start interactive shell") do |v|
      options.interactive_mode = true
    end

    parser.on("-o", "--output_format FORMAT", "Format output data") do |v|

      transformers = {
          'i' => ->(object) { object.inspect },
          'j' => ->(object) { JSON.pretty_generate(object) },
          'p' => ->(object) { sio = StringIO.new; sio.puts(object); sio.string },
          'y' => ->(object) { object.to_yaml }
      }

      choice = v[0].downcase

      unless transformers.keys.include?(choice)
        raise %Q{Output format "#{choice}" not in list of available formats} +
                  " (#{transformers.keys.inspect})."
      end

      options.post_processor = transformers[choice]
    end

    parser.on("-h", "--help", "Show help") do |_help_requested|
      ARGV << 'h' # pass on the request to the command processor
    end
  end.parse!
  options
end