Dear package developers,
I was reading section 2.5 Cross-references of Writing R Extensions and I
found the following sentence.
The last sentence of the section [1] is:
> Packages referred to by these ‘other forms’ should be declared in the
DESCRIPTION file, in the ‘Depends’, ‘Imports’, ‘Suggests’ or ‘Enhances’
fields.
These "other forms" I understand are those not using a topic for anchoring
(\link[=topic]{text}), but using the package like \link[pkg]{text} or
\link[pkg:topic]{text}.
But my question is how to interpret this "declared in the DESCRIPTION
file". Should all packages be listed as a direct dependency, or could they
also be on a recursive dependency?
As far as I could tell there is currently no check on R, or repositories
checks, for this and some R documentation files have cross-references to
packages outside their (recursive) dependency tree.
This results in the following error message (on my IDE) when following the
cross-reference: URL '/help/library/<pkg>/help/<topic> not found.
Best,
Lluís
[1]:
https://cran.r-project.org/doc/manuals/r-devel/R-exts.html#Cross_002dreferences-1
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