Class: Optimist::Option

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

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Option 



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# File 'lib/optimist_with_insert_blanks.rb', line 690

def initialize
  @long = nil
  @short = nil
  @name = nil
  @multi_given = false
  @hidden = false
  @default = nil
  @optshash = {}
end

Instance Attribute Details

#default ⇒ Object

Returns the value of attribute default.



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# File 'lib/optimist_with_insert_blanks.rb', line 687

def default
  @default
end

#long ⇒ Object

Returns the value of attribute long.



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# File 'lib/optimist_with_insert_blanks.rb', line 687

def long
  @long
end

#multi_given=(value) ⇒ Object (writeonly)

Sets the attribute multi_given



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# File 'lib/optimist_with_insert_blanks.rb', line 688

def multi_given=(value)
  @multi_given = value
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/optimist_with_insert_blanks.rb', line 687

def name
  @name
end

#short ⇒ Object

Returns the value of attribute short.



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# File 'lib/optimist_with_insert_blanks.rb', line 687

def short
  @short
end

Class Method Details

.create(name, _desc = '', opts = {}, _settings = {}) ⇒ Object

Determines which type of object to create based on arguments passed to Optimist::opt. This is trickier in Optimist, than other cmdline parsers (e.g. Slop) because we allow the default: to be able to set the option's type.



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# File 'lib/optimist_with_insert_blanks.rb', line 792

def self.create(name, _desc = '', opts = {}, _settings = {})
  opttype = Optimist::Parser.registry_getopttype(opts[:type])
  opttype_from_default = get_klass_from_default(opts, opttype)

  if opttype && opttype_from_default && (opttype.class != opttype_from_default.class)
    raise ArgumentError,
          ":type specification and default type don't match (default type is #{opttype_from_default.class})"
  end

  opt_inst = opttype || opttype_from_default || Optimist::BooleanOption.new

  ## fill in :long
  opt_inst.long = handle_long_opt(opts[:long], name)

  ## fill in :short
  opt_inst.short = handle_short_opt(opts[:short])

  ## fill in :multi
  multi_given = opts[:multi] || false
  opt_inst.multi_given = multi_given

  ## fill in :default for flags
  defvalue = opts[:default] || opt_inst.default

  ## autobox :default for :multi (multi-occurrence) arguments
  defvalue = [defvalue] if defvalue && multi_given && !defvalue.is_a?(Array)
  opt_inst.default = defvalue
  opt_inst.name = name
  opt_inst.opts = opts
  opt_inst
end

.get_klass_from_default(opts, opttype) ⇒ Object 



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# File 'lib/optimist_with_insert_blanks.rb', line 837

def self.get_klass_from_default(opts, opttype)
  ## for options with :multi => true, an array default doesn't imply
  ## a multi-valued argument. for that you have to specify a :type
  ## as well. (this is how we disambiguate an ambiguous situation;
  ## see the docs for Parser#opt for details.)

  disambiguated_default = if opts[:multi] && opts[:default].is_a?(Array) && opttype.nil?
                            opts[:default].first
                          else
                            opts[:default]
                          end

  return nil if disambiguated_default.nil?

  type_from_default = get_type_from_disdef(opts[:default], opttype, disambiguated_default)
  Optimist::Parser.registry_getopttype(type_from_default)
end

.get_type_from_disdef(optdef, opttype, disambiguated_default) ⇒ Object 



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# File 'lib/optimist_with_insert_blanks.rb', line 824

def self.get_type_from_disdef(optdef, opttype, disambiguated_default)
  if disambiguated_default.is_a? Array
    return(optdef.first.class.name.downcase + 's') unless optdef.empty?

    raise ArgumentError, 'multiple argument type cannot be deduced from an empty array' unless opttype
    raise ArgumentError, 'multiple argument type must be plural' unless opttype.multi_arg?

    return nil

  end
  disambiguated_default.class.name.downcase
end

.handle_long_opt(lopt, name) ⇒ Object 



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# File 'lib/optimist_with_insert_blanks.rb', line 855

def self.handle_long_opt(lopt, name)
  lopt = lopt ? lopt.to_s : name.to_s.gsub('_', '-')
  lopt = case lopt
         when /^--([^-].*)$/ then ::Regexp.last_match(1)
         when /^[^-]/        then lopt
         else                     raise ArgumentError, "invalid long option name #{lopt.inspect}"
         end
end

.handle_short_opt(sopt) ⇒ Object 



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# File 'lib/optimist_with_insert_blanks.rb', line 864

def self.handle_short_opt(sopt)
  sopt = sopt.to_s if sopt && sopt != :none
  sopt = case sopt
         when /^-(.)$/          then ::Regexp.last_match(1)
         when nil, :none, /^.$/ then sopt
         else                   raise ArgumentError, "invalid short option name '#{sopt.inspect}'"
         end

  if sopt && (sopt =~ ::Optimist::Parser::INVALID_SHORT_ARG_REGEX)
    raise ArgumentError,
          "a short option name can't be a number or a dash"
  end
  sopt
end

.register_alias(*alias_keys) ⇒ Object

Provide a way to register symbol aliases to the Parser



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# File 'lib/optimist_with_insert_blanks.rb', line 779

def self.register_alias(*alias_keys)
  alias_keys.each do |alias_key|
    # pass in the alias-key and the class
    Parser.register(alias_key, self)
  end
end

Instance Method Details

#array_default? ⇒ Boolean

note: Option-Types with both multi_arg? and flag? false are single-parameter (normal) options.



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# File 'lib/optimist_with_insert_blanks.rb', line 728

def array_default?
  default.is_a?(Array)
end

#callback ⇒ Object 



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# File 'lib/optimist_with_insert_blanks.rb', line 736

def callback
  opts(:callback)
end

#desc ⇒ Object 



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# File 'lib/optimist_with_insert_blanks.rb', line 740

def desc
  opts(:desc)
end

#description_with_default ⇒ Object

Format the educate-line description including the default-value(s)



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# File 'lib/optimist_with_insert_blanks.rb', line 762

def description_with_default
  return desc unless default

  default_s = case default
              when $stdout   then '<stdout>'
              when $stdin    then '<stdin>'
              when $stderr   then '<stderr>'
              when Array
                default.join(', ')
              else
                default.to_s
              end
  defword = desc.end_with?('.') ? 'Default' : 'default'
  "#{desc} (#{defword}: #{default_s})"
end

#educate ⇒ Object 



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# File 'lib/optimist_with_insert_blanks.rb', line 757

def educate
  (short? ? "-#{short}, " : '') + "--#{long}" + type_format + (flag? && default ? ", --no-#{long}" : '')
end

#flag? ⇒ Boolean

Indicates a flag option, which is an option without an argument



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# File 'lib/optimist_with_insert_blanks.rb', line 709

def flag?
  false
end

#multi ⇒ Object Also known as: multi? 



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# File 'lib/optimist_with_insert_blanks.rb', line 717

def multi
  @multi_given
end

#multi_arg? ⇒ Boolean

Indicates that this is a multivalued (Array type) argument



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# File 'lib/optimist_with_insert_blanks.rb', line 723

def multi_arg?
  false
end

#opts(key) ⇒ Object 



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# File 'lib/optimist_with_insert_blanks.rb', line 700

def opts(key)
  @optshash[key]
end

#opts=(o) ⇒ Object 



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# File 'lib/optimist_with_insert_blanks.rb', line 704

def opts=(o)
  @optshash = o
end

#parse(_paramlist, _neg_given) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/optimist_with_insert_blanks.rb', line 748

def parse(_paramlist, _neg_given)
  raise NotImplementedError, 'parse must be overridden for newly registered type'
end

#required? ⇒ Boolean 



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# File 'lib/optimist_with_insert_blanks.rb', line 744

def required?
  opts(:required)
end

#short? ⇒ Boolean 



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# File 'lib/optimist_with_insert_blanks.rb', line 732

def short?
  short && short != :none
end

#single_arg? ⇒ Boolean 



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# File 'lib/optimist_with_insert_blanks.rb', line 713

def single_arg?
  !multi_arg? && !flag?
end

#type_format ⇒ Object

provide type-format string. default to empty, but user should probably override it



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# File 'lib/optimist_with_insert_blanks.rb', line 753

def type_format
  ''
end