[ESS] Customisation of ess-r-versions or ess-r-versions-list

[John Maindonald]

Thanks for that.  Insertion, prior to (require 'ess-site)
  (setq ess-r-versions '("R-2" "R32" "R64"))

does the job.

Inserting
setq ess-r-versions-list
         '( ("R64" "/usr/bin/R64")
            ("R32" "/usr/bin/R32")))

did nothing, but maybe I needed to combine this with some other addition.

John Maindonald             email: john.maindonald at anu.edu.au
phone : +61 2 (6125)3473    fax  : +61 2(6125)5549
Centre for Mathematics & Its Applications, Room 1194,
John Dedman Mathematical Sciences Building (Building 27)
Australian National University, Canberra ACT 0200.
http://www.maths.anu.edu.au/~johnm

On 16/08/2011, at 8:37 PM, Stephen Eglen wrote:

> John Maindonald <john.maindonald at anu.edu.au> wrote:
> 
>> With the release of 5.14, I have moved from Carbon Emacs to
>> Vincent Goulet's bundle for MacOS.  Everything is working, 
>> except that placing the following in my .emacs [prior to 
>> (require 'ess-site)
>> ]
>> now has no effect:
>> 
>> (setq ess-r-versions-list
>>          '( ("R64" "/usr/bin/R64")
>>             ("R32" "/usr/bin/R32")))
>> 
>> Nor does (setq ess-r-versions '("R-2" "R32" "R64"))
>> or the equivalent with defvar.
>> 
>> Are such a customisation been for the time being disabled;
>> I did see a comment somewhere that suggested this?
> 
> No, I think the issue is with the init files.  I'm cc'ing Vincent in.
> Here is the relevant part of the info documentation for Emacs:
> 
> ----------------------------------------------------------------------
>   There can also be a "default init file", which is the library named
> `default.el', found via the standard search path for libraries.  The
> Emacs distribution contains no such library; your site may create one
> for local customizations.  If this library exists, it is loaded
> whenever you start Emacs (except when you specify `-q').  But your init
> file, if any, is loaded first; if it sets `inhibit-default-init'
> non-`nil', then `default' is not loaded.
> 
>   Your site may also have a "site startup file"; this is named
> `site-start.el', if it exists.  Like `default.el', Emacs finds this
> file via the standard search path for Lisp libraries.  Emacs loads this
> library before it loads your init file.  To inhibit loading of this
> library, use the option `--no-site-file'.  *Note Initial Options::.  We
> recommend against using `site-start.el' for changes that some users may
> not like.  It is better to put them in `default.el', so that users can
> more easily override them.
> ----------------------------------------------------------------------
> 
> The problem you have found is that ESS is loaded by site-start.el,
> before your .emacs file is read.  The ESS code that searches for other
> versions of R is run only once, when ESS is loaded.  Hence your changes
> come too late.
> 
> If you are feeling brave, just edit Vincent's site.start.el and put your
> setq commands before ESS is loaded, and restart Emacs.  You can find
> site-start.el by doing M-x locate-library RET site-start.el 
> Does that then work for you?
> 
> As hinted above, in the info, it might be better to use default.el,
> which is loaded after the user's .emacs files.  What do you think
> Vincent?
> 
> Stephen
> 
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