[R-pkg-devel] package in 'Suggests'

[Lorenzo Busetto]

Dear David,

    sorry for the late reply: I didn't notice your message earlier since it
ended-up in a different thread.

Thanks for your suggestion: this is actually what I'm currently  planning
to do, since also my package can work without the GUI.

regards,

Lorenzo



On 20 October 2016 at 15:07, David C Sterratt <david.c.sterratt at ed.ac.uk>
wrote:

> Dear Lorenzo,
>
> For my "retistruct" package, which depends on gWidgets2RGtk2, I have
> gWidgets2RGtk2, gWidgets2 and cairoDevice as "Suggests" and I put the
> following code in the function that opens the GUI ('retistruct()' in
> https://github.com/davidcsterratt/retistruct/blob/master/pkg/retistruct/R/
> retistruct-gui.R):
>
>   guiToolkit <- "RGtk2"
>   require.package <- function(pkg) {
>     suggests<-tools::package.dependencies(installed.packages()["retistruct",],
> depLevel="Suggests")$retistruct
>     suggests <- suggests[suggests[,1] == pkg]
>     uptodate <- ifelse(is.na(suggests[2]),
>                        TRUE,
>                        eval(parse(text=paste("packageVersion(suggests[1])",
> suggests[2],  "suggests[3]"))))
>     if (!require(pkg, character.only=TRUE) |
>         !uptodate) {
>       message(paste("Trying to install required package", pkg))
>       install.packages(pkg)
>       if (!require(pkg, character.only=TRUE)) {
>         stop(paste("Could not install", pkg))
>       }
>     }
>   }
>   require.package(paste0("gWidgets2", guiToolkit))
>   require.package("cairoDevice")
>   options(guiToolkit=guiToolkit)
>
>
> The package can work without a GUI, and may be installed on systems that
> do not have GTK installed. There is user documentation on installing
> RGtk2 which, if it's useful to you, you could of course copy:
> http://retistruct.r-forge.r-project.org/retistruct-user-guide.pdf
>
> Best wishes,
>
> David.
>
> --
> David C Sterratt, Research Fellow - http://homepages.inf.ed.ac.uk/sterratt
> Institute for Adaptive and Neural Computation     tel: +44 131 651 1739
> School of Informatics, University of Edinburgh    fax: +44 131 650 6899
> Informatics Forum, 10 Crichton Street, Edinburgh EH8 9AB, Scotland, UK
>
> --
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> Scotland, with registration number SC005336.
>
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