[Rd] optional package dependency

[Kurt Hornik]

>>>>> Jeff Ryan writes:

> Hi Ross,
> The quantmod package makes available routines from a variety of
> contributed packages, but gets around your issues with a bit of, um,
> trickery.

> Take a look here (unless your name is Kurt ;-) ):

But Kurt will we happy to tell you that you can turn off "forcing"
suggested packages for checking by setting

  _R_CHECK_FORCE_SUGGESTS_=false

in your environment.  The idea is that maintainers typically want to
fully check their functionality, suggesting to force suggests by
default.

-k
  

> http://r-forge.r-project.org/plugins/scmsvn/viewcvs.php/pkg/R/buildModel.methods.R?rev=367&root=quantmod&view=markup

> It would be nice to have Suggests really mean suggests to check, but I
> am sure there is a good reason it doesn't.

> HTH
> Jeff

> On Fri, Jan 15, 2010 at 12:00 AM, Ross Boylan <ross at biostat.ucsf.edu> wrote:
>> I have a package that can use rmpi, but works fine without it.  None of
>> the automatic test code invokes rmpi functionality.  (One test file
>> illustrates how to use it, but has quit() as its first command.)
>> 
>> What's the best way to handle this?  In particular, what is the
>> appropriate form for upload to CRAN?
>> 
>> When I omitted rmpi from the DESCRITPION file R CMD check gave
>> <quote>
>> * checking R code for possible problems ... NOTE
>> alldone: no visible global function definition for ‘mpi.bcast.Robj’
>> alldone: no visible global function definition for ‘mpi.exit’
>> <quote>
>> followed by many more warnings.
>> 
>> When I add
>> Suggests: Rmpi
>> in DESCRIPTION the check stops if the package is not installed:
>> <quote>
>> * checking package dependencies ... ERROR
>> Packages required but not available:
>>  Rmpi
>> </quote>
>> Rmpi is not required, but I gather from previous discussion on this list
>> that suggests basically means required for R CMD check.
>> 
>> NAMESPACE seems to raise similar issues; I don't see any mechanism for
>> optional imports.  Also, I have not used namespaces, and am not eager to
>> destabilize things so close to release.  At least, I hope I'm close to
>> release :)
>> 
>> Thanks for any advice.
>> 
>> Ross Boylan
>> 
>> P.S. Thanks, Duncan, for your recent advice on my help format problem
>> with R 2.7.  I removed the nested \description, and now things look OK.
>> 
>> ______________________________________________
>> R-devel at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-devel
>> 



> -- 
> Jeffrey Ryan
> jeffrey.ryan at insightalgo.com

> ia: insight algorithmics
> www.insightalgo.com

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