[R-pkg-devel] Used package not updated - needs java < V 11

On 15/12/2020 8:02 a.m., Knut Krueger wrote:

I am using in my Package XlConnect. If the Computer is using Java < 11
all is working. But if not, the package can not be used.


inside teh functions tehre is an ' @importFrom XLConnect createSheet
writeWorksheet saveWorkbook

but only used for additional comfort to use excel sheets

The package is usable without XlConnect if I change

Imports:? igraph,chron,gdata, XLConnect
to
Imports:
????? igraph,chron,gdata
Suggests:XLConnect

but then I get the error

checking package dependencies ... ERROR
??? Namespace dependency not required: ?XLConnect?

Just now the new version is on my private repository and working with or
without Xlconnect depending on the java version


How can I submit the package to cran? until XlConnect is working with
java > 11

You should not have

@importFrom XLConnect createSheet writeWorksheet saveWorkbook

in your ROxygen comments; that results in an unconditional import. 
Instead, you should use fully qualified calls each time, i.e.

XLConnect::createSheet, XLConnect::writeWorksheet, XLConnect::saveWorkbook

in your code.? You should also wrap every use of those functions in 
checks like

if (requireNamespace("XLConnect")) {
 ? run code
} else {
 ? report that you can't run that code
}

and make sure none of your examples or vignettes fail if XLConnect is 
not present.

Duncan Murdoch