def METHOD_NAME(ret, ruby, default=False, user=None):
    """
    Verify that ruby is installed, install if unavailable
    """
    ret = _ruby_installed(ret, ruby, user=user)
    if not ret["result"]:
        if __salt__["rbenv.install_ruby"](ruby, runas=user):
            ret["result"] = True
            ret["changes"][ruby] = "Installed"
            ret["comment"] = "Successfully installed ruby"
            ret["default"] = default
        else:
            ret["result"] = False
            ret["comment"] = "Failed to install ruby"
            return ret
    if default:
        __salt__["rbenv.default"](ruby, runas=user)
    return ret