[R-pkg-devel] check cross-references error: Non-file package-anchored link(s)

[Gábor Csárdi]

On Mon, Jun 15, 2020 at 5:30 PM Duncan Murdoch <murdoch.duncan using gmail.com> wrote:
>
> On 15/06/2020 12:05 p.m., Martin Maechler wrote:
> >>>>>> Duncan Murdoch   on Sun, 14 Jun 2020 07:28:03 -0400 writes:
> >
> >      > I agree with almost everything you wrote, except one thing:  this isn't
> >      > newly enforced, it has been enforced since the help system began.  What
> >      > I think is new is that there are now tests for it.  Previously those
> >      > links just wouldn't work.
> >
> >      > Duncan Murdoch
> >
> > Yes, to all... including Duncan's agreement with Gábor.
> >
> > Also, Duncan M earlier did mention that he had wanted to
> > *change* the link-to-file behavior for these cases (when he
> > wrote most of the Rd2html source code) but somehow did not get it.
>
> Actually, I don't think I pushed for this change at the time (or at
> least I didn't push much).  I just wish now that I had, because I think
> it will be harder to do it now than it would have been then.
>
> Duncan

I am not entirely sure, but maybe just documenting the current
behaviour and undoing 78674 could work. With some tweaks? E.g.

* updating R-exts to say that \link[pkg:topic]{text} will link to
`topic.html` in `pkg` first (for historical reasons), and falls back
to searching for `topic` in `pkg` at render time.
* updating Rd2HTML to look for the topic and use it in the link,
instead of throwing a warning, in it cannot find `topic.html`
* removing the `R CMD check` warning for non-file links, that was
added in 78674 :)

Is there anything else?

Gabor

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