Method: Main::Parameter::List#parse_options

Defined in:

lib/main/parameter.rb

#parse_options(argv, params = nil) ⇒ Object

# File 'lib/main/parameter.rb', line 358

def parse_options argv, params = nil
  params ||= options

  spec, h, s = [], {}, {}

  params.each do |p|
    head, *tail = p.names
    long = "--#{ head }"
    shorts = tail.map{|t| "-#{ t }"}
    type =
      if p.argument_required? then GetoptLong::REQUIRED_ARGUMENT
      elsif p.argument_optional? then GetoptLong::OPTIONAL_ARGUMENT
      else GetoptLong::NO_ARGUMENT
      end
    a = [ long, shorts, type ].flatten
    spec << a
    h[long] = p
    s[long] = a
  end

  begin
    GetoptLong.new(argv, *spec).each do |long, value|
      value =
        case s[long].last
          when GetoptLong::NO_ARGUMENT
            value.empty? ? true : value
          when GetoptLong::OPTIONAL_ARGUMENT
            value.empty? ? true : value
          when GetoptLong::REQUIRED_ARGUMENT
            value
        end
      p = h[long]
      p.add_value value
    end
  rescue GetoptLong::AmbigousOption, GetoptLong::NeedlessArgument,
         GetoptLong::MissingArgument, GetoptLong::InvalidOption => e
    c = Parameter.const_get e.class.name.split(/::/).last
    ex = c.new e.message
    ex.set_backtrace e.backtrace
    ex.extend Softspoken
    raise ex
  end
end