should cran be an argument of pre_release()

[maelle]

pre_release(cran = FALSE) could then be used if your package is not on CRAN. It wouldn't create cran-comments.md. Maybe it should still encourage some sort of checks à la R-hub, maybe not.

[krlmlr]

I'll work on splitting pre_release() in sensible lower-level testable APIs so that users can also build their own strategies.

[maelle]

based on #658, no, it's tailored for CRAN.