Dear Brian, -------------------------------- John Fox Department of Sociology McMaster University Hamilton, Ontario Canada L8S 4M4 905-525-9140x23604 http://socserv.mcmaster.ca/jfox --------------------------------
> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Prof Brian Ripley > Sent: Friday, September 22, 2006 3:55 AM > To: Martin Maechler > Cc: r-devel@stat.math.ethz.ch > Subject: Re: [Rd] Package dependencies and imports > > On Fri, 22 Sep 2006, Martin Maechler wrote: > > >>>>>> "Seth" == Seth Falcon <[EMAIL PROTECTED]> > >>>>>> on Thu, 21 Sep 2006 10:33:06 -0700 writes: > > > > Seth> Martin Maechler <[EMAIL PROTECTED]> writes: > > >> I think you should use the new DESCRIPTION field and say > > >> 'Enhances: rgl' > > >> > > >> but I haven't checked if this prevents the warning, > > >> though I think it should.. > > > > Seth> But is Rcmdr enhancing rgl or being enhanced by rgl? > > > > Seth> :-( :-( > > > > I think this distinction is not so easily made on a general level. > > I'd say an argument for how you can (should?) think about > this is the > > following abstraction: > > > > There are two packages, A and B. > > A's DESCRIPTION has 'Enhances: B'. > > When B is there, A provides extra features. > > In one sense, this always enhances B ("enhance" in the > usual English > > meaning), since B's area of application has been enlarged > by code in > > A. > > Yes, but that is just as true of the raft of packages that > Rcmdr has in 'Suggests'. I suggested to John, and still > think, that 'Suggests: rgl' is right. Rcmdr will work > without it, but works better with it and so if you are > installing Rcmdr you would like to install rgl as well (but > it fails to install it would not be a major loss). > Although I may have lost track of the exact sequence, I believe that I originally had rgl under Suggests:, but when rgl is absent from a system, that causes Rcmdr to fail R CMD check. I'd prefer to have rgl under Suggests:, since then I wouldn't have to treat it as a special case and it would be installed automatically by install.packages("Rcmdr", dependencies=TRUE). Regards, John ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
