R devel - May 2016 - objects intermittently shared between vignettes

Hello:


       Is it widely known that objects not explicitly deleted from one 
vignette in a package can be available to a second in "R CMD build"
and
"R CMD check" but not when the second vignette is built manually, at 
least under RStudio on Mac OS X 10.11.4 using R 3.3.0?


        For an example, see


install.packages("pkgW2vignettes",
repos="http://R-Forge.R-project.org")


       This package contains two toy vignettes.


       This is not a big deal, but it spooked me, when I saw 227 objects 
listed by "objects()" in a vignette built by "R CMD build" +
"R CMD
check", when the same "objects()" command only listed 4 objects
when I
built the same vignette by itself from within RStudio.


       Enjoy,
       Spencer Graves

On 12/05/2016 9:21 PM, Spencer Graves wrote:
> Hello:
>
>
>         Is it widely known that objects not explicitly deleted from one
> vignette in a package can be available to a second in "R CMD
build" and
> "R CMD check" but not when the second vignette is built manually,
at
> least under RStudio on Mac OS X 10.11.4 using R 3.3.0?
>
>
>          For an example, see
>
>
> install.packages("pkgW2vignettes",
repos="http://R-Forge.R-project.org")
>
>
>         This package contains two toy vignettes.
>
>
>         This is not a big deal, but it spooked me, when I saw 227 objects
> listed by "objects()" in a vignette built by "R CMD
build" + "R CMD
> check", when the same "objects()" command only listed 4
objects when I
> built the same vignette by itself from within RStudio.
>
Yes, this is a known flaw in the current build system.  It would be 
better if vignettes were built in a separate process that was started 
with an empty workspace.

There's an intention to clean up several vignette building issues, but 
so far no action.

Duncan Murdoch