def parse_options
      @options = {}
      @option_parser = OptionParser.new do |opts|
        opts.on "-p", "--prefix PREFIX", "url prefix for the export command" do |prefix|
          @prefix = "#{prefix}"
        end
      end
      @option_parser.banner = BANNER
      @option_parser.parse! ARGV
    end
def parse_options
      @options = {}
      @option_parser = OptionParser.new do |opts|
        opts.on "-p", "--prefix PREFIX", "url prefix for the export command" do |prefix|
          @prefix = "#{prefix}"
        end
      end
      @option_parser.banner = BANNER
      @option_parser.parse! ARGV
    end
Option parsing