Compare installed R to the current R

[jennybc]

Capturing ideas from a Slack conversation.

Sometimes we encounter people living in an R time capsule, either intentionally, out of fear of upgrading, or they somehow just drifted into it.

Write up some ways to programmatically compare your installed R version to the current version.

rversions::r_release()
getRversion()
r_versions()

A milestone of "out-of-date-ness":

issue a warning when you are > 2 minor releases old, since CRAN stops building binaries for them

Long-term: could be an update.packages()-type function in pkgman or part of a "health check" function in usethis.