> 1) Get a list of recommended packages from that version of R -
> preferably in a way that does not require them to be hard-coded in a
> test script, but generated by R.

Unfortunately, I couldn't find one when I was looking for it. It might
be worth asking the R list whether there is something like this that
does not require Internet (which, after all, should not be a
requirement for building Sage once one actually has a Sage copy), nor
parsing some huge list of *all* packages.

Ben's way of testing them should work (see 
http://cran.r-project.org/doc/manuals/R-admin.html,
and he is right that library('tools') is needed), but I don't know how
to get a shell script like spkg-check to run these commands in R, or
anything else.   Of course, this would do a lot more than check their
presence, and would be more or less like running spkg-check, I guess.

> 2) Test if all those recommended packages have actually built.
>
> Does that sound reasonable? If so, I'll try to sort out how to do it,
> though any help would be appreciated, as I've never written any sort
> of test in Sage, and I have never used R. But I see this as pretty
> important, so will put some time in.
>

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