def checkArgs()

in core/src/main/scala/kafka/admin/AclCommand.scala [616:650]
24 lines of code
21 McCabe index (conditional complexity)

    def checkArgs(): Unit = {
      if (options.has(bootstrapServerOpt) && options.has(authorizerOpt))
        CommandLineUtils.printUsageAndDie(parser, "Only one of --bootstrap-server or --authorizer must be specified")

      if (!options.has(bootstrapServerOpt))
        CommandLineUtils.checkRequiredArgs(parser, options, authorizerPropertiesOpt)

      if (options.has(commandConfigOpt) && !options.has(bootstrapServerOpt))
        CommandLineUtils.printUsageAndDie(parser, "The --command-config option can only be used with --bootstrap-server option")

      if (options.has(authorizerPropertiesOpt) && options.has(bootstrapServerOpt))
        CommandLineUtils.printUsageAndDie(parser, "The --authorizer-properties option can only be used with --authorizer option")

      val actions = Seq(addOpt, removeOpt, listOpt).count(options.has)
      if (actions != 1)
        CommandLineUtils.printUsageAndDie(parser, "Command must include exactly one action: --list, --add, --remove. ")

      CommandLineUtils.checkInvalidArgs(parser, options, listOpt, Set(producerOpt, consumerOpt, allowHostsOpt, allowPrincipalsOpt, denyHostsOpt, denyPrincipalsOpt))

      //when --producer or --consumer is specified , user should not specify operations as they are inferred and we also disallow --deny-principals and --deny-hosts.
      CommandLineUtils.checkInvalidArgs(parser, options, producerOpt, Set(operationsOpt, denyPrincipalsOpt, denyHostsOpt))
      CommandLineUtils.checkInvalidArgs(parser, options, consumerOpt, Set(operationsOpt, denyPrincipalsOpt, denyHostsOpt))

      if (options.has(listPrincipalsOpt) && !options.has(listOpt))
        CommandLineUtils.printUsageAndDie(parser, "The --principal option is only available if --list is set")

      if (options.has(producerOpt) && !options.has(topicOpt))
        CommandLineUtils.printUsageAndDie(parser, "With --producer you must specify a --topic")

      if (options.has(idempotentOpt) && !options.has(producerOpt))
        CommandLineUtils.printUsageAndDie(parser, "The --idempotent option is only available if --producer is set")

      if (options.has(consumerOpt) && (!options.has(topicOpt) || !options.has(groupOpt) || (!options.has(producerOpt) && (options.has(clusterOpt) || options.has(transactionalIdOpt)))))
        CommandLineUtils.printUsageAndDie(parser, "With --consumer you must specify a --topic and a --group and no --cluster or --transactional-id option should be specified.")
    }