[ESS] Setting paths to R versions in different directories

[Vitalie Spinu]

Ok, that was it. It works with the right prefix. Thanks for the tip. I
was always calling the devel version R-dev, I wish I would not have
saved two letters.

One last thing, ess-r-versions doesn't sounds right to me. Shouldn't it
be something like `ess-R-program-start-strings` or `ess-R-program-partial-names`?

  Vitalie

 >>> Stephen Eglen on Sun, 19 Oct 2014 23:44:15 +0100 wrote:

 >> I have just got a new system and got R devel installed from
 >> source in ~/bin/R-patched/, then I
 >> 
 >> cd ~/bin && ln -sf R-patched/bin/R R-latest
 >> 
 >> and re-started Emacs. Then M-x R- TAB, no R-latest in there.
 >> 
 >> So, R-latest should have been created and should have been in the
 >> completion list, right?

 > No (close, but no).  I hope

 > cd ~/bin && ln -sf R-patched/bin/R R-patched-latest

 > would work; see:
 > ----------------------------------------------------------------------
 > ess-r-versions is a variable defined in `ess-r-d.el'.
 > Its value is ("R-1" "R-2" "R-3" "R-devel" "R-patched" "R32" "R64")

 > Documentation:
 > List of partial strings for versions of R to access within ESS.
 > Each string specifies the start of a filename.  If a filename
 > beginning with one of these strings is found on `exec-path', a M-x
 > command for that version of R is made available.  For example, if the
 > file "R-1.8.1" is found and this variable includes the string
 > "R-1", a function called `M-x R-1.8.1' will be available to run that
 > version of R.
 > If duplicate versions of the same program are found (which happens if
 > the same path is listed on `exec-path' more than once), they are
 > ignored by calling `ess-uniq-list'.
 > Set this variable to nil to disable searching for other versions of R.
 > If you set this variable, you need to restart Emacs (and set this variable
 > before ess-site is loaded) for it to take effect.
 > ----------------------------------------------------------------------