在另一个程序包或函数中装载一个程序包时，是否有可能得到通知？

Question

I am writing a function for my package, and its goal is to get notified when a certain package is loaded so that it could do something to respond to the package loading. It's similar to .onLoad() except that it's the response for other packages.

Is it possible to do this in R?

Answer 1

OK, I figured it out by using setHook() .

setHook(packageEvent("pkg", "attach"),
    function(...) {
      message('hooked')
    } )