#6: Easiest package registration

Welcome to the sixth post in the really random R riffs series, or R⁴ for short.

Posts #1 and #2 discussed how to get the now de rigeur package registration information computed. In essence, we pointed to something which R 3.4.0 would have, and provided tricks for accessing it while R 3.3.3 was still R-released.

But now R 3.4.0 is out, and life is good! Or at least this is easier. For example, a few days ago I committed this short helper script pnrrs.r to littler:

#!/usr/bin/r

if (getRversion() < "3.4.0") stop("Not available for R (< 3.4.0). Please upgrade.", call.=FALSE)

tools::package_native_routine_registration_skeleton(".")

So with this example script pnrrs.r soft-linked to /usr/local/bin (or ~/bin) as I commonly do with littler helpers, all it takes is

cd some/R/package/source
pnrrs.r

and the desired file usable as src/init.c is on stdout. Editing NAMESPACE is quick too, and we’re all done. See the other two posts for additional context. If you don’t have littler, the above also works with Rscript.

This post by Dirk Eddelbuettel originated on his Thinking inside the box blog. Please report excessive re-aggregation in third-party for-profit settings.