[ESS] Multiple R versions not recognized on M-x R-[Tab]

[Martin Maechler]

Dear Marius  (and all the other readers),

All your R versions must be in your PATH, i.e.,  the  <rbuild>/bin/R
must be in your PATH,
but of course not "as R" but  as "R-3..." or "R-devel.."
and "the way" is to use symbolic links :

e.g.

cd /usr/local/bin
ln -s  /usr/local/R/R-3.2.0_build/bin/R  R-3.2.0

Hint:  R 3.2.0 went from "alpha" to "beta" today ... release is in
about two weeks.

Best regards,
Martin

On Thu, Apr 2, 2015 at 9:50 PM, Marius Hofert
<marius.hofert using uwaterloo.ca> wrote:
> Hi,
>
> I work on Debian Testing and installed ESS (M-x ess-version gives: 15.03 [git:
> 6cbe608018deda6fa5608735c821094a553dd55c] (loaded from
> /usr/share/emacs/site-lisp/ess/)) and have several R version installed. However,
> I don't see them via M-x R-[Tab].
>
> I saw this post:
> http://grokbase.com/t/r/ess-help/14aghnm1je/ess-setting-paths-to-r-versions-in-different-directories
> and https://stat.ethz.ch/pipermail/ess-help/2011-September/007137.html
> but neither gives precise instructions how to get the 'automagically determine R
> versions' feature.
>
> Here are some more details:
> - Emacs 24.4.1
> - M-x ess-r-versions-created gives /usr/local/R/R
> - M-x ess-rterm-version-paths gives nil
> - M-x R-[Tab] gives:
>
> Possible completions are:
> R-fix-T-F R-initialize-on-start
> R-mode R-site-search
> R-transcript-mode
>
> Judging from the second post above, I tried this:
>
> (setq ess-rterm-version-paths "/usr/local/R/R"); for finding all
> installed R versions
>
> ... but M-x R-[Tab] still gives the same output as before
>
>
> Concerning R installation, I installed from source in /usr/local/R:
>
>   /usr/local/R:
>   total used in directory 55M available 147988960
>   drwxr-sr-x 130 mhofert mhofert 4.0K 2015-04-01 22:52 library
>   lrwxrwxrwx   1 mhofert mhofert   32 2015-03-31 15:57 R ->
> /usr/local/R/R-3.1.3_build/bin/R
>   drwxr-sr-x  15 mhofert mhofert 4.0K 2015-03-31 15:52 R-3.1.3_build
>   drwxr-sr-x  10 mhofert mhofert 4.0K 2015-03-09 04:12 R-3.1.3_source
>   -rw-r--r--   1 mhofert mhofert  28M 2015-03-09 04:12 R-3.1.3.tar.gz
>   drwxr-sr-x  15 mhofert mhofert 4.0K 2015-04-02 15:16 R-devel_build
>   drwxr-sr-x  10 mhofert mhofert 4.0K 2015-04-01 21:20 R-devel_source
>   -rw-r--r--   1 mhofert mhofert  27M 2015-04-02 15:08 R-devel.tar.gz
>
> [this is a setup very similar to Martin has (I guess) -- he showed it to me once
> and it has worked well ever since :-)]
>
> Many cheers,
> Marius
>
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