class Thor::Option

:nodoc:

def self.parse(key, value)


By default all options are optional, unless :required is given.

string (--foo=value) or booleans (just --foo).
is given a default type is assumed. This default type accepts arguments as
The valid types are :boolean, :numeric, :hash, :array and :string. If none

#=> Option foo with default value true and type boolean
parse :foo => true

#=> Option foo without default value and type numeric
parse :foo => :numeric

#=> Option foo with default value 2 and type numeric
parse :foo => 2

#=> Required option foo without default value
parse :foo => :required

#=> Option foo with default value bar and alias :baz
parse [:foo, :baz] => "bar"

#=> Option foo with default value bar
parse :foo => "bar"

assumptions, but you can be more specific using the option method.
This parse quick options given as method_options. It makes several 
def self.parse(key, value)
  if key.is_a?(Array)
    name, *aliases = key
  else
    name, aliases = key, []
  end
  name    = name.to_s
  default = value
  type = case value
    when Symbol
      default  = nil
      if VALID_TYPES.include?(value)
        value
      elsif required = (value == :required)
        :string
      elsif value == :optional
        # TODO Remove this warning in the future.
        warn "Optional type is deprecated. Choose :boolean or :string instead. Assumed to be :boolean."
        :boolean
      end
    when TrueClass, FalseClass
      :boolean
    when Numeric
      :numeric
    when Hash, Array, String
      value.class.name.downcase.to_sym
  end
  self.new(name.to_s, nil, required, type, default, nil, nil, aliases)
end

def dasherize(str) 

def dasherize(str)
  (str.length > 1 ? "--" : "-") + str.gsub('_', '-')
end

def dasherized? 

def dasherized?
  name.index('-') == 0
end

def human_name 

def human_name
  @human_name ||= dasherized? ? undasherize(name) : name
end

def initialize(name, description=nil, required=nil, type=nil, default=nil, banner=nil, group=nil, aliases=nil) 

def initialize(name, description=nil, required=nil, type=nil, default=nil, banner=nil, group=nil, aliases=nil)
  super(name, description, required, type, default, banner)
  @aliases = [*aliases].compact
  @group   = group.to_s.capitalize if group
end

def method_missing(method, *args, &block)


Allow some type predicates as: boolean?, string? and etc. 
def method_missing(method, *args, &block)
  given = method.to_s.sub(/\?$/, '').to_sym
  if valid_type?(given)
    self.type == given
  else
    super
  end
end

def switch_name 

def switch_name
  @switch_name ||= dasherized? ? name : dasherize(name)
end

def undasherize(str) 

def undasherize(str)
  str.sub(/^-{1,2}/, '')
end

def usage(padding=0) 

def usage(padding=0)
  sample = if banner && !banner.to_s.empty?
    "#{switch_name}=#{banner}"
  else
    switch_name
  end
  sample = "[#{sample}]" unless required?
  if aliases.empty?
    (" " * padding) << sample
  else
    "#{aliases.join(', ')}, #{sample}"
  end
end

def valid_type?(type) 

def valid_type?(type)
  VALID_TYPES.include?(type.to_sym)
end

def validate! 

def validate!
  raise ArgumentError, "An option cannot be boolean and required." if boolean? && required?
end