[R-pkg-devel] check cross-references error: Non-file package-anchored link(s)
Gábor Csárdi
c@@rd|@g@bor @end|ng |rom gm@||@com
Tue Jun 16 22:31:59 CEST 2020
This is how to look up the filename. The first "sp" is the topic name,
the second is the package name.
> help("sp", "sp")[[1]]
[1] "C:/Users/csard/R/win-library/4.0/sp/help/00sp"
So you need to link to the "00sp.Rd" file: \link[sp:00sp]{sp}
Gabor
On Tue, Jun 16, 2020 at 9:09 PM Wayne Oldford <rwoldford using uwaterloo.ca> wrote:
>
> Hi
>
> I got caught by this new test this week in trying to push an updated release of the loon package to CRAN.
>
> By following this thread, I corrected my cross-references to external packages but I got stymied by
> the one I hoped to give to the "sp" package for Spatial data
>
> _________
>
> Here is the history:
>
> I tried
> \link[sp:sp]{sp}
> which failed here:
> Debian: <https://win-builder.r-project.org/incoming_pretest/loon_1.3.1_20200616_162128/Debian/00check.log>
> Status: 1 WARNING
>
>
> That was meant to correct an earlier attempt (it did for other links to "scales" for example) where I had tried
> \link[sp]{sp}
> and failed here:
> Debian: <https://win-builder.r-project.org/incoming_pretest/loon_1.3.1_20200615_213749/Debian/00check.log>
> Status: 1 WARNING
>
>
> So to complete the possibilities as I understand them, I just now tried
> \link{sp}
> which, as might be expected, failed here:
> Debian: <https://win-builder.r-project.org/incoming_pretest/loon_1.3.1_20200616_213921/Debian/00check.log>
> Status: 1 WARNING
> As expected, error here was different: "Missing link" as opposed to "Non-file package-anchored link"
>
> _________
>
>
> I am not sure whether I have missed a subtlety in WRE or that the peculiar circumstance
> where the package, the topic, and the file name are all identical (sp) is some weird boundary case.
>
> Without further advice, I think I am just going to remove the link to "sp".
> It really is just a courtesy link to the package description for "sp".
>
> Thanks in advance for your thoughts.
>
> Wayne
>
>
>
>
> -----Original Message-----
> From: R-package-devel <r-package-devel-bounces using r-project.org> on behalf of Georgi Boshnakov <georgi.boshnakov using manchester.ac.uk>
> Date: Tuesday, June 16, 2020 at 9:27 AM
> To: Gábor Csárdi <csardi.gabor using gmail.com>, Duncan Murdoch <murdoch.duncan using gmail.com>
> Cc: List r-package-devel <r-package-devel using r-project.org>
> Subject: Re: [R-pkg-devel] check cross-references error: Non-file package-anchored link(s)
>
> I think that the current behaviour is documented in WRE:
>
> "...There are two other forms of optional argument specified as \link[pkg]{foo} and
> \link[pkg:bar]{foo} to link to the package pkg, to files foo.html and bar.html respectively.
> These are rarely needed, perhaps to refer to not-yet-installed packages (but there the HTML
> help system will resolve the link at run time) or in the normally undesirable event that more
> than one package offers help on a topic7 (in which case the present package has precedence so
> this is only needed to refer to other packages). They are currently only used in HTML help
> (and ignored for hyperlinks in LATEX conversions of help pages), and link to the file rather
> than the topic (since there is no way to know which topics are in which files in an uninstalled
> package) ... Because they have been frequently misused, the HTML help system looks for topic foo in package pkg
> if it does not find file foo.html."
>
> Unless I am missing something, it seems that it would be relatively painless to reverse the logic of the current behaviour of the help system,
> i.e. to start looking first for the topic and then for a file.
>
> Georgi Boshnakov
>
> -----Original Message-----
> From: R-package-devel <r-package-devel-bounces using r-project.org> On Behalf Of Gábor Csárdi
> Sent: 16 June 2020 13:44
> To: Duncan Murdoch <murdoch.duncan using gmail.com>
> Cc: List r-package-devel <r-package-devel using r-project.org>
> Subject: Re: [R-pkg-devel] check cross-references error: Non-file package-anchored link(s)
>
> 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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