    # File lib/chef/shef.rb, line 289
        def parse_opts
          remainder = parse_options
          environment = remainder.first
          # We have to nuke ARGV to make sure irb's option parser never sees it.
          # otherwise, IRB complains about command line switches it doesn't recognize.
          ARGV.clear
          config[:config_file] = config_file_for_shef_mode(environment)
          config_msg = config[:config_file] || "none (standalone shef session)"
          puts "loading configuration: #{config_msg}"
          Chef::Config.from_file(config[:config_file]) if !config[:config_file].nil? && File.exists?(config[:config_file]) && File.readable?(config[:config_file])
          Chef::Config.merge!(config)
        end