Class: Samovar::Option

Inherits:
Object
  • Object
show all
Defined in:
lib/samovar/options.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(flags, description, key: nil, default: nil, value: nil, type: nil, &block) ⇒ Option

Returns a new instance of Option.



25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
 
# File 'lib/samovar/options.rb', line 25

def initialize(flags, description, key: nil, default: nil, value: nil, type: nil, &block)
	@flags = Flags.new(flags)
	@description = description
	
	if key
		@key = key
	else
		@key = @flags.first.key
	end
	
	@default = default
	
	# If the value is given, it overrides the user specified input.
	@value = value
	@value ||= true if @flags.boolean?
	
	@type = type
	@block = block
end

Instance Attribute Details

#default ⇒ Object (readonly)

Returns the value of attribute default.



49
50
51
 
# File 'lib/samovar/options.rb', line 49

def default
  @default
end

#description ⇒ Object (readonly)

Returns the value of attribute description.



46
47
48
 
# File 'lib/samovar/options.rb', line 46

def description
  @description
end

#flags ⇒ Object (readonly)

Returns the value of attribute flags.



45
46
47
 
# File 'lib/samovar/options.rb', line 45

def flags
  @flags
end

#key ⇒ Object (readonly)

Returns the value of attribute key.



51
52
53
 
# File 'lib/samovar/options.rb', line 51

def key
  @key
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



47
48
49
 
# File 'lib/samovar/options.rb', line 47

def type
  @type
end

Instance Method Details

#coerce(result) ⇒ Object 



65
66
67
68
69
70
71
72
73
74
75
 
# File 'lib/samovar/options.rb', line 65

def coerce(result)
	if @type
		result = coerce_type(result)
	end
	
	if @block
		result = @block.call(result)
	end
	
	return result
end

#coerce_type(result) ⇒ Object 



53
54
55
56
57
58
59
60
61
62
63
 
# File 'lib/samovar/options.rb', line 53

def coerce_type(result)
	if @type == Integer
		Integer(result)
	elsif @type == Float
		Float(result)
	elsif @type.respond_to? :call
		@type.call(result)
	elsif @type.respond_to? :new
		@type.new(result)
	end
end

#parse(input, default = @default) ⇒ Object 



77
78
79
80
81
 
# File 'lib/samovar/options.rb', line 77

def parse(input, default = @default)
	if result = @flags.parse(input)
		@value.nil? ? coerce(result) : @value
	end || default
end

#to_a ⇒ Object 



87
88
89
90
91
92
93
 
# File 'lib/samovar/options.rb', line 87

def to_a
	unless @default.nil?
		[@flags, @description, "Default: #{@default}"]
	else
		[@flags, @description]
	end
end

#to_s ⇒ Object 



83
84
85
 
# File 'lib/samovar/options.rb', line 83

def to_s
	@flags
end