Function restore_env

win/build-all-win.py:53–57

(var_name: str, old_value: str | None)

def restore_env(var_name: str, old_value: str | None) -> None:
    if old_value is None:
        del os.environ[var_name]
    else:
        os.environ[var_name] = old_value


def build() -> None: