[R-pkg-devel] preventing auto-update of R and c2d4u r-cran-* packages on Ubuntu 22.04

[Dirk Eddelbuettel]

On 11 August 2023 at 07:54, Thomas Petzoldt wrote:
| After moving this discussion to R-SIG-Debian 
| (https://stat.ethz.ch/pipermail/r-sig-debian/2023-August/thread.html), 
| Dirk Eddelbuettel suggested five different approaches.
| 
| I made indeed a snapshot (a local copy) of the complete "site-library" 
| folder to another place of the file system (e.g. 
| "site-library-snapshot"). In the .Renviron file of the shiny user, the 
| environment variable R_LIBS_USER then points to this location. The base 
| packages from "library" are conservative, so I decided to use them from 
| the original position.
| 
| Finally, an rmarkdown script provided by the shiny-server can report the 
| value of .libPaths() and versions and locations of installed packages:
| 
| installed.packages()[,2:3]
| 
| This works well, except for a package that contained relative symbolic 
| links to the file system.

Perfect, and thanks for reporting back.

One other exception would be 'bad' packages with a hard code installation
path (via rpath or install_name_tool) but luckily CRAN outlaws that so it
should be rare (but 'been there, done that' and had to fix a package or two
of mine). In short, 'should work most of the time as described here'.

Dirk

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