[R-pkg-devel] Rcpp: how best to include source from another Github repository

[John Clarke]

Thanks Jonathan, this is helpful. I'm just a bit concerned based on other
comments that submodules might not be compatible with CRAN and/or other CI
runners. Plus, I only want a few cpp files copied over.

On Thu, Jan 23, 2025 at 3:19 PM Jonathan Berrisch <jonathan using berrisch.biz>
wrote:

> Hi John,
>
> first of all: I'm not an expert on this and don't really know if there
> is a recommended way.
>
> However, you may look at my 'rcpptimer' package and how it includes
> 'cpptimer' as a submodule.
>
> You can find the repository here: https://github.com/BerriJ/rcpptimer
>
> And here you can see 'cpptimer' which is included as a submodule:
> https://github.com/BerriJ/rcpptimer/tree/main/inst/include
>
> Whenever I make commits to 'cpptimer' I have to update the submodule
> (basically changing at what commit I want to have that submodule
> included 'git submodule update --remote'). You'll find good
> documentation about submodules online.
>
> Maybe that helps.
>
> Best Regards,
>
> Jonathan / BerriJ
>
>
> On 1/21/25 11:57, John Clarke wrote:
> > Hi folks,
> >
> > I have an Rcpp package I'm developing. All but one of the cpp source code
> > files are pulled from the original/authoritative (CLI) version of the
> > application. The only unique cpp source code to the Rcpp package is my
> > wrapper.cpp which contains the Rcpp interface. This approach works fine,
> > but every time we make changes to the original CLI repository, it
> requires
> > a manual (and duplicate) commit to my Rcpp repo. This is not ideal from a
> > source tracking perspective and is a DRY violation.
> >
> > What is the recommended way of maintaining the shared cpp code in a Rcpp
> > repo? Ideally, it would be nice to be able to pull the files from the
> > source repo using a tag/hash so that the only code change in the Rcpp
> repo
> > would be that reference rather than all the changes to the shared source.
> > It would also be nice to use some sort of symlinkish setup during
> > development to allow quick testing before making commits in the original
> > CLI repo. Is this possible? Recommended? (we can assume dev is on MacOS
> or
> > Linux)
> >
> > Thanks,
> >
> > -John
> >
> > John Clarke | Senior Technical Advisor |
> > Cornerstone Systems Northwest | john.clarke using cornerstonenw.com
> >
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> >
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