[R-SIG-Mac] Multiple R versions: set Current via symbolic link: permissions?

[Martin Ellis]

I'm not sure if you're already aware of RSwitch (available at
http://r.research.att.com/), but it seems like it might be useful for
what you're trying to do.

Cheers,
Martin


On 11 October 2011 11:24, Marius Hofert <Marius.Hofert at math.ethz.ch> wrote:
> Hi,
>
> I have multiple R versions installed and would like to switch between them via setting the symblic link "Current". To make this a bit more convenient, I defined two "aliases" in .bashrc:
>
> alias R2.13='d=/Library/Frameworks/R.framework/Versions; rm $d/Current; ln -s $d/2.13 $d/Current'
> alias R2.14='d=/Library/Frameworks/R.framework/Versions; rm $d/Current; ln -s $d/2.14 $d/Current'
>
> On executing R2.13 in the terminal, I get:
> rm: /Library/Frameworks/R.framework/Versions/Current: Permission denied
> ln: /Library/Frameworks/R.framework/Versions/Current/2.13: Permission denied
>
> If I chown Current, I still get:
> rm: /Library/Frameworks/R.framework/Versions/Current: Permission denied
>
> I (bad) solution is to put in "sudo" in the alias...
>
> How is it done correctly?
>
> Cheers,
>
> Marius
>
> PS: I also posted it for future reference, I've only found the idea of using ln -s on the help pages/FAQ, but not how to get around the permission issue.
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