module Mixlib::CLI

def parse_options(argv=ARGV)
  argv = argv.dup
  @opt_parser = OptionParser.new do |opts|
    # Set the banner
    opts.banner = banner
    # Create new options
    options.sort { |a, b| a[0].to_s <=> b[0].to_s }.each do |opt_key, opt_val|
      opt_args = build_option_arguments(opt_val)
      opt_method = case opt_val[:on]
        when :on
          :on
        when :tail
          :on_tail
        when :head
          :on_head
        else
          raise ArgumentError, "You must pass :on, :tail, or :head to :on"
        end
      parse_block =
        Proc.new() do |c|
          config[opt_key] = (opt_val[:proc] && opt_val[:proc].call(c)) || c
          puts opts if opt_val[:show_options]
          exit opt_val[:exit] if opt_val[:exit]
        end
      full_opt = [ opt_method ]
      opt_args.inject(full_opt) { |memo, arg| memo << arg; memo }
      full_opt << parse_block
      opts.send(*full_opt)
    end
  end
  @opt_parser.parse!(argv)
  # Deal with any required values
  options.each do |opt_key, opt_value|
    if opt_value[:required] && !config.has_key?(opt_key)
      reqarg = opt_value[:short] || opt_value[:long]
      puts "You must supply #{reqarg}!"
      puts @opt_parser
      exit 2
    end
  end
  argv
end