from pathlib import Path


def ensure_relative_path(file_path: str, relative_to: str | Path = None) -> Path:
    """
    Convert the given path to a relative path.

    :param file_path: The path to check and possibly convert.
    :param relative_to: Optional path to which the given path should be made relative.
                        If not provided, the current working directory is used.
    :return: The relative path.
    """
    path = Path(file_path)
    if path.is_absolute():
        base_path = Path(relative_to) if relative_to else Path.cwd()
        return path.relative_to(base_path)
    return path