[R-pkg-devel] Suggested package relies on recent R

[Duncan Murdoch]

On 08/12/2018 9:28 AM, Hadley Wickham wrote:
> Can you just set _R_CHECK_FORCE_SUGGESTS_=false?
> 
> env:
>    global:
>    # don't treat missing suggested packages as error
>    - _R_CHECK_FORCE_SUGGESTS_=false
> 
> I am reasonably certain that is what CRAN uses.

Also make sure that examples fail gracefully if the suggested package is 
not present, i.e. wrap uses of the suggested package in

if (requireNamespace(...)) { ... }

Duncan Murdoch


> 
> Hadley
> 
> On Fri, Dec 7, 2018 at 9:11 AM David Hugh-Jones
> <davidhughjones using gmail.com> wrote:
>>
>> Hi,
>>
>> My package Suggests a package that relies on R >= 3.5.0. My package works
>> fine with earlier R, though. When travis runs R CMD check on R-oldrel,
>> therefore, it fails because it can't install the suggested package.
>>
>> Is this going to stop me submitting to CRAN? I don't really want to require
>> R 3.5.0 just to satisfy an optional dependency.