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

[Martin Maechler]

>>>>> Duncan Murdoch 
>>>>>     on Thu, 15 Sep 2022 04:42:04 -0400 writes:

    > 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

Ok, thank you, for the clarification.

Note that  `R CMD build --help`  mentions (among more)

  --resave-data=        re-save data files as compactly as possible:
                        "no", "best", "gzip" (default)
  --no-resave-data      same as --resave-data=no

so when building the package,
Ivan should get what he wanted with

    R CMD build --no-resave-data  <pkg>

no ?

Martin