[R] Checking package licences including dependencies?

Gabor Grothendieck ggrothendieck at gmail.com
Tue Jul 27 15:48:45 CEST 2010

On Tue, Jul 27, 2010 at 7:17 AM, Allan Engelhardt <allane at cybaea.com> wrote:
> I only recently discovered options("available_packages_filters" = list(add =
> TRUE, "license/FOSS")) [cf. help("available.packages", package="utils") in R
> 2.10.0 or later] which goes nicely with my options("checkPackageLicense" =
> TRUE) [new in R 2.11].
> But now I want to purge my library of packages I would not have installed
> had I known about this option earlier (I'm looking at you, "gam"!).
> Short of erasing the whole directory of libraries and re-installing it, is
> there an easy way of achieving this?
> I could probably roll something based on tools:::analyze_license() but I
> think the erase-and-reinstall option might be easier in this case :-)

Try this:

    License <- installed.packages()[, "License"]

and then just delete the ones you don't want or write a simple
function which examines License and issues a remove.packages() for
those that match or don't match whatever you want.

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