应该＆＃34; onLoad.R＆＃34;包含在描述文件＆＃34;整理＆＃34;领域？

Question

我需要在加载软件包时显示免责声明消息。看完帖子后

Library/package development - message when loading
Loading depending packages using .onLoad

我现在有一个仅包含

的zzz.R文件

.onLoad <- function(libname, pkgname){
    packageStartupMessage('Regarding data obtained from www.retrosheet.org:\n
    The information used here was obtained free of charge from  
    and is copyrighted by Retrosheet. Interested parties may
    contact Retrosheet at "www.retrosheet.org"', domain = NULL, appendLF = TRUE)
}

我有两个问题：

1. 我是否必须在某个地方拨打.onLoad？或者这是自动发生的吗？

2. 我正在使用Collate文件中的DESCRIPTION字段。 zzz.R是否需要添加到该列表中？

---

作为检查，我运行以下代码。使用install时会显示程序包启动消息，但在调用library时则不会出现此消息。

> library(devtools)
> install()
...
Reloading installed saber
Regarding data obtained from www.retrosheet.org:

The information used here was obtained free of charge from  
and is copyrighted by Retrosheet. Interested parties may
contact Retrosheet at "www.retrosheet.org"
...

> detach(package:saber)
> library(saber)

Attaching package: ‘saber’

The following objects are masked _by_ ‘.GlobalEnv’:

    getTeamData, relatedBatting