Method main

awscli/clidriver.py:577–614

:param args: List of arguments, with the 'aws' removed. For example, the command "aws s3 list-objects --bucket foo" will have an args list of ``['s3', 'list-objects', '--bucket', 'foo']``.

(self, args=None)

        return parser

    def main(self, args=None):
        """

        :param args: List of arguments, with the 'aws' removed.  For example,
            the command "aws s3 list-objects --bucket foo" will have an
            args list of ``['s3', 'list-objects', '--bucket', 'foo']``.

        """
        if args is None:
            args = sys.argv[1:]
        command_table = self._get_command_table()
        parser = self.create_parser(command_table)
        self._add_aliases(command_table, parser)
        parsed_args = None
        try:
            # Because _handle_top_level_args emits events, it's possible
            # that exceptions can be raised, which should have the same
            # general exception handling logic as calling into the
            # command table.  This is why it's in the try/except clause.
            parsed_args, remaining = parser.parse_known_args(args)
            self._handle_top_level_args(parsed_args)
            validate_preferred_output_encoding()
            self._emit_session_event(parsed_args)
            HISTORY_RECORDER.record('CLI_VERSION', self._cli_version(), 'CLI')
            HISTORY_RECORDER.record('CLI_ARGUMENTS', args, 'CLI')
            return command_table[parsed_args.command](remaining, parsed_args)
        except BaseException as e:
            # when --version action executed default argparser prints out
            # version string and calls sys.exit(0)
            if isinstance(e, SystemExit) and e.code == 0:
                return e.code
            LOG.debug("Exception caught in main()", exc_info=True)
            return self._error_handler.handle_exception(
                e,
                stdout=get_stdout_text_writer(),
                stderr=get_stderr_text_writer(),
                parsed_globals=parsed_args,
            )

    def _emit_session_event(self, parsed_args):
        # This event is guaranteed to run after the session has been