Method __call__

nonebot/rule.py:549–586

(
        self,
        state: T_State,
        cmd: tuple[str, ...] | None = Command(),
        msg: Message | None = CommandArg(),
    )

        return hash((frozenset(self.cmds), self.parser))

    async def __call__(
        self,
        state: T_State,
        cmd: tuple[str, ...] | None = Command(),
        msg: Message | None = CommandArg(),
    ) -> bool:
        if cmd not in self.cmds or msg is None:
            return False

        try:
            state[SHELL_ARGV] = list(
                chain.from_iterable(
                    shlex.split(str(seg))
                    if cast(MessageSegment, seg).is_text()
                    else (seg,)
                    for seg in msg
                )
            )
        except Exception as e:
            # set SHELL_ARGV to none indicating shlex error
            state[SHELL_ARGV] = None
            # ensure SHELL_ARGS is set to ParserExit if parser is provided
            if self.parser:
                state[SHELL_ARGS] = ParserExit(status=2, message=str(e))
            return True

        if self.parser:
            t = parser_message.set("")
            try:
                args = self.parser.parse_args(state[SHELL_ARGV])
                state[SHELL_ARGS] = args
            except ArgumentError as e:
                state[SHELL_ARGS] = ParserExit(status=2, message=str(e))
            except ParserExit as e:
                state[SHELL_ARGS] = e
            finally:
                parser_message.reset(t)
        return True


def shell_command(