[R-pkg-devel] Examples taking too long depend on object that takes a while to generate

[Duncan Murdoch]

On 15/09/2022 3:45 a.m., Martin Maechler wrote:
>>>>>> Duncan Murdoch
>>>>>>      on Wed, 14 Sep 2022 13:02:28 -0400 writes:
> 
>      > On 14/09/2022 12:43 p.m., Ivan Krylov wrote:
>      >> On Wed, 14 Sep 2022 12:31:49 -0400
>      >> Duncan Murdoch <murdoch.duncan using gmail.com> wrote:
>      >>
>      >>> It's also possible to put .R files in the data directory, and they
>      >>> are executed to create the data object.  I think that happens at the
>      >>> time when you call data() rather than at install time, so it might
>      >>> not be helpful.
>      >>
>      >> Some time ago I was hoping to compress a package of mine by generating a
>      >> dataset during a data() call instead loading it from an .rda file, but
>      >> it turned out that the .R file is executed during R CMD build:
>      >> https://github.com/r-devel/r-svn/blob/03df313ad37456c6a62158328d4e373408ce4d59/src/library/tools/R/build.R#L794
> 
>      > Thanks for that info.  That's not good for John, because the
>      > architecture isn't known at build time.
> 
>      > Duncan Murdoch
> 
> Sorry to muddy the water, but what *is* "build time"?
> There's the big difference between building
> 1) a  Source tarball                    and
> 2) a  MacOS or Windows binary package
> 
> Unfortunately, the two situations are very different notably in
> this case, where '(2)' is really much closer to the
> "install time" you mention.
> 

I meant building the tarball, and assumed that was what Ivan was talking 
about as well.

Duncan Murdoch