[R-pkg-devel] Testing package on R-devel in a docker container

[Dirk Eddelbuettel]

On 11 August 2025 at 05:26, Ott Toomet wrote:
| * Is this "narrower" library path for CMD check explained somewhere?

Make your package (in a test, maybe even just tests/hello.R) do
`print(.libPaths())` and assert it is different during tests.

This has nothing to do with the Docker container (but arguably related to how
I packaged R for Debian for 20-some years following a discussion with Kurt
and Fritz 'way back when' that lead to the current split and the three
default directories):

> .libPaths()                           # my comments for rationale below
[1] "/usr/local/lib/R/site-library"     # system-wide, not packaged
[2] "/usr/lib/R/site-library"           # non-base/recommended packages from the distro
[3] "/usr/lib/R/library"                # base+recommended packages from the distrp
> 

plus optionally one below $HOME (and I personally do without).

Follow-ups, if any, maybe to r-sig-debian?

Hth,  Dirk

-- 
dirk.eddelbuettel.com | @eddelbuettel | edd using debian.org