Preventing loading of user packages
On 8/25/2014 2:08 PM, Jonathon Love wrote:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 hey, i was able to solve the problem by explicitly putting R_LIBS_USER='' in the /etc/Renviron file (it isn't enough simply to comment the entry out, because it has a default value that magically comes from somewhere else)
It is worth pointing out that what you have done is removed the personal library from the default list of libraries. So when loading a library, it won't be found in a (the) personal library. However, a user can circumvent this easily if they wish, either by adding a directory to the library path list via .libPaths() or by specifying lib.loc in a call to library() (or a variety of other ways). In other words, a user can still "load[...] user packages" with a little additional effort. For your use case, this may be sufficient. But I didn't want you to have the impression that this made it impossible to load additional packages.
cheers On 25/08/2014 9:59 pm, David Winsemius wrote:
On Aug 25, 2014, at 7:11 AM, Ista Zahn wrote:
On Mon, Aug 25, 2014 at 5:58 AM, Jonathon Love <jon at thon.cc> wrote:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Hi, I'm trying to prevent the loading of packages from the 'personal library'
Of behalf of the users you are about to cripple, please, do not do that!
Hello jonathon and Ista; (I think this might be the first time I've seriously with Ista.) I've been in the situation where I had multiple copies of packages in 2 different libraries and wanted to do exactly what was requested. I'm assuming that the "main" library directory is something other than '~/Library/R/3.0/library' and permissions allow packages to be accessed and placed there. A quick method would simply be to execute this at the command line (or if it needed to be repeated in .Rprofile) : .libPaths( .libPaths()[!which(.libPaths() == '~/Library/R/3.0/library')] ) I suppose you could wrap some testing around this to prevent the removal of that path if it were the only one or if it were the path to the base and stats packages. Fo me this reports correctly that my base package is not there:
grepl("~/Library/R/3.0/library" ,
attr(packageDescription('base'), "file") )
[1] FALSE But this raises the question. Why is this happening and why don't you just delete the directory?
Brian S. Diggs, PhD Senior Research Associate, Department of Surgery Oregon Health & Science University