Method push_command

src/script.rs:167–169

(&mut self, command: Commands)

        self.explain = format!("{}{}", explain, "...");
    }

    pub(crate) fn set_offset(&mut self, offset: i32) {
        let new_offset = (self.backlog_offset as i32 + offset).max(0);
        // 不能超过最大可偏移量
        let max_offset = self.max_offset();
        self.backlog_offset = new_offset.min(max_offset as i32) as usize;