Parse command line arguments.

def parse_args(self):
        """Parse command line arguments."""
        args = self.init_args().parse_args()

        # Load the configuration file, if it exists
        self.config = Config(args.conf_file)

        # Debug mode
        if args.debug:
            from logging import DEBUG
            logger.setLevel(DEBUG)
        else:
            from warnings import simplefilter
            simplefilter("ignore")

        # Plugins disable/enable
        if args.disable_plugin is not None:
            for p in args.disable_plugin.split(','):
                disable(args, p)
        else:
            # Allow users to disable plugins from the glances.conf (issue #1378)
            for s in self.config.sections():
                if self.config.has_section(s) \
                   and (self.config.get_bool_value(s, 'disable', False)):
                    disable(args, s)
                    logger.debug('{} disabled by the configuration file'.format(s))

        # Exporters activation
        if args.export is not None:
            for p in args.export.split(','):
                setattr(args, 'export_' + p, True)

        # Client/server Port
        if args.port is None:
            if args.webserver:
                args.port = self.web_server_port
            else:
                args.port = self.server_port
        # Port in the -c URI #996
        if args.client is not None:
            args.client, args.port = (x if x else y for (x, y) in zip(args.client.partition(':')[::2], (args.client, args.port)))

        # Autodiscover
        if args.disable_autodiscover:
            logger.info("Auto discover mode is disabled")

        # By default Windows is started in Web mode
        if WINDOWS:
            args.webserver = True

        # In web server mode, default refresh time: 5 sec
        if args.webserver:
            args.time = 5
            args.process_short_name = True

        # Server or client login/password
        if args.username_prompt:
            # Every username needs a password
            args.password_prompt = True
            # Prompt username
            if args.server:
                args.username = self.__get_username(
                    description='Define the Glances server username: ')
            elif args.webserver:
                args.username = self.__get_username(
                    description='Define the Glances webserver username: ')
            elif args.client:
                args.username = self.__get_username(
                    description='Enter the Glances server username: ')
        else:
            if args.username_used:
                # A username has been set using the -u option ?
                args.username = args.username_used
            else:
                # Default user name is 'glances'
                args.username = self.username

        if args.password_prompt or args.username_used:
            # Interactive or file password
            if args.server:
                args.password = self.__get_password(
                    description='Define the Glances server password ({} username): '.format(
                        args.username),
                    confirm=True,
                    username=args.username)
            elif args.webserver:
                args.password = self.__get_password(
                    description='Define the Glances webserver password ({} username): '.format(
                        args.username),
                    confirm=True,
                    username=args.username)
            elif args.client:
                args.password = self.__get_password(
                    description='Enter the Glances server password ({} username): '.format(
                        args.username),
                    clear=True,
                    username=args.username)
        else:
            # Default is no password
            args.password = self.password

        # By default help is hidden
        args.help_tag = False

        # Display Rx and Tx, not the sum for the network
        args.network_sum = False
        args.network_cumul = False

        # Manage light mode
        if args.enable_light:
            logger.info("Light mode is on")
            args.disable_left_sidebar = True
            disable(args, 'process')
            disable(args, 'alert')
            disable(args, 'amps')
            disable(args, 'docker')

        # Manage full quicklook option
        if args.full_quicklook:
            logger.info("Full quicklook mode")
            enable(args, 'quicklook')
            disable(args, 'cpu')
            disable(args, 'mem')
            disable(args, 'memswap')
            enable(args, 'load')

        # Manage disable_top option
        if args.disable_top:
            logger.info("Disable top menu")
            disable(args, 'quicklook')
            disable(args, 'cpu')
            disable(args, 'mem')
            disable(args, 'memswap')
            disable(args, 'load')

        # Init the generate_graph tag
        # Should be set to True to generate graphs
        args.generate_graph = False

        # Control parameter and exit if it is not OK
        self.args = args

        # Export is only available in standalone or client mode (issue #614)
        export_tag = self.args.export is not None and any(self.args.export)
        if WINDOWS and export_tag:
            # On Windows, export is possible but only in quiet mode
            # See issue #1038
            logger.info("On Windows OS, export disable the Web interface")
            self.args.quiet = True
            self.args.webserver = False
        elif not (self.is_standalone() or self.is_client()) and export_tag:
            logger.critical("Export is only available in standalone or client mode")
            sys.exit(2)

        # Filter is only available in standalone mode
        if args.process_filter is not None and not self.is_standalone():
            logger.critical(
                "Process filter is only available in standalone mode")
            sys.exit(2)

        # Disable HDDTemp if sensors are disabled
        if getattr(args, 'disable_sensors', False):
            disable(args, 'hddtemp')
            logger.debug("Sensors and HDDTemp are disabled")

        return args