Class: ImageOptim::TrueFalseNil

Inherits:

Object

• Object
• ImageOptim::TrueFalseNil

Defined in:

lib/image_optim/true_false_nil.rb

Overview

Denote ternary value (‘true`/`false`/`nil`) for worker option

Class Method Summary

• .add_to_option_parser(option_parser) ⇒ Object

  Add handling of ternary value in OptionParser instance, maps ‘nil` and `’nil’‘ to `nil`.

• .convert(v) ⇒ Object

  Convert everything truthy to ‘true`, leave `false` and `nil` as is.

Class Method Details

.add_to_option_parser(option_parser) ⇒ Object

Add handling of ternary value in OptionParser instance, maps ‘nil` and `’nil’‘ to `nil`

# File 'lib/image_optim/true_false_nil.rb', line 6

def self.add_to_option_parser(option_parser)
  completing = OptionParser.top.atype[TrueClass][0].merge('nil' => nil)
  option_parser.accept(self, completing){ |_arg, val| val }
end

.convert(v) ⇒ Object

Convert everything truthy to ‘true`, leave `false` and `nil` as is

# File 'lib/image_optim/true_false_nil.rb', line 12

def self.convert(v)
  v && true
end