def abspath(path):
    """Convert the given path to an absolute path.

    Since FS objects have no concept of a *current directory*, this
    simply adds a leading ``/`` character if the path doesn't already
    have one.

    Arguments:
        path (str): A PyFilesytem path.

    Returns:
        str: An absolute path.

    """
    if not path.startswith('/'):
        return '/' + path
    return path
