def _artifact_display_versions(versions):
    """Return a list of artifact versions for display purposes.

    This is slightly different than the 'versions' property of the artifact, as
    it is reverse-sorted (newest at the top) and also enumerated so that while
    it's reversed, the numbers still indicate chronological order.
    """
    versions_list = list(versions)
    return [
        (len(versions) - i, v)
        for (i, v) in enumerate(reversed(versions_list))
    ]