You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: pattern_create.rb
    path of file: ./repos/metasploit-framework/tools/exploit
    
    the code of the file until where you have to start completion: #!/usr/bin/env ruby

##
#
    
    def self.parse(args)
      options = {}
      parser = OptionParser.new do |opt|
        opt.banner = "Usage: #{__FILE__} [options]\nExample: #{__FILE__} -l 50 -s ABC,def,123\nAd1Ad2Ad3Ae1Ae2Ae3Af1Af2Af3Bd1Bd2Bd3Be1Be2Be3Bf1Bf"
        opt.separator ''
        opt.separator 'Options:'
        opt.on('-l', '--length <length>', Integer, "The length of the pattern") do |len|
          options[:length] = len
        end

        opt.on('-s', '--sets <ABC,def,123>', Array, "Custom Pattern Sets") do |sets|
          options[:sets] = sets
        end

        opt.on_tail('-h', '--help', 'Show this message') do
          $stdout.puts opt
          exit
        end
      end

      parser.parse!(args)

      if options.empty?
        raise OptionParser::MissingArgument, 'No options set, try -h for usage'
      elsif options[:length].nil? && options[:sets]
        raise OptionParser::MissingArgument, '-l <length> is required'
      end