[R-pkg-devel] Is it ever appropriate (or mandatory) to Suggests: R (>= version) ?
This is implicitly OK: If A suggests B and B depends on some R version, then B is only available if you are running that R version anyway, hence the additional declaration is not needed. The typical cause of trouble is as follows: A depends on B and B suggests C. Then A has to suggest C in case spme functionality in A relies on parts of B that actually need C. Best, Uwe Ligges
On 24.01.2018 14:44, Hugh Parsonage wrote:
I believe it is a requirement that if package A imports package B, and
package B lists package C in Depends: then package A must also list
package C in Depends:
A popular stackoverflow answer states this.[1] I can't find any other
source but it makes sense.
What if package B is suggested by package A and package B depends on a
certain version of R? That is if package A *suggests* package B and
package B lists Depends: R (>= ver). In such a case, is it necessary
to list this dependency in Suggests? Certainly endnote 12 of WRE says
it would be necessary if the dependency were for a package, but
doesn't seem to mention similar dependencies on R version. And, as far
as I can see, no package on CRAN lists R in Suggests, so it would to
be non-standard if not prohibited.
S <- available.packages()
S[grepl("(?<!([A-Za-z]))R \\(", S[, "Suggests"], perl = TRUE), ]
[1] https://stackoverflow.com/a/8638902/1664978
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