Method: CommandLine::OptionParser#to_s

Defined in:

lib/commandline/optionparser/optionparser.rb

#to_s(sep = "\n") ⇒ Object

# File 'lib/commandline/optionparser/optionparser.rb', line 454

def to_s(sep="\n")
  return "" if @options.empty?

  require 'text/format'
  @f = Text::Format.new
  @f.columns = @columns
  @f.first_indent  = 4
  @f.body_indent   = 8
  @f.tag_paragraph = false

  header = ["OPTIONS\n"]
  s = []
  @options.each { |opt|
    opt_str = []
    if block_given?
      result = yield(opt.names, opt.opt_description, opt.arg_description) 
      if result.kind_of?(String)
        opt_str << result unless result.empty?
      elsif result.nil?
        opt_str << format_option(opt.names, opt.opt_description, opt.arg_description) 
      elsif result.kind_of?(Array) && 3 == result.size
        opt_str << format_option(*result)
      else
        raise "Invalid return value #{result.inspect} from yield block "+
              "attached to #to_s."
      end
    else
      opt_str << format_option(opt.names, opt.opt_description, opt.arg_description)
    end
    s << opt_str.join unless opt_str.empty?
  }
  #s.collect! { |i| i.kind_of?(Array) && /\n+/ =~ i[0] ? i.join : f.paragraphs(i) }
  [header, s].flatten.join(sep)
end