Function should_auto_background

tutorials/14_bash_engine_deep_dive.py:660–666

决定是否自动后台化

(command: str, elapsed: float)

    SLEEP_COMMANDS = {"sleep"}  # 禁止自动后台化的命令

    def should_auto_background(command: str, elapsed: float) -> bool:
        """决定是否自动后台化"""
        # 检查是否是 sleep 命令
        first_word = command.strip().split()[0] if command.strip() else ""
        if first_word in SLEEP_COMMANDS:
            return False  # sleep 不允许自动后台化
        return elapsed > AUTO_BG_THRESHOLD_SECONDS

    test_cases = [
        ("npm install", 20.0, True),