[ESS] ESS and .Rhistory

[Stephen Eglen]

Dear Erik, Feng,

Thanks for this -- I was blissfully unaware about this persistence of
history across R sessions.  Howabout if we change the semantics of
ess-history-file to be:

nil -- do not attempt to read/write a history file
t -- use the default naming scheme for loading the history
"some.string" -- use this value as the filename.


Stephen
> Feng,
> 
> On 04/20/2011 09:00 AM, Feng Li wrote:
> > Dear list,
> >
> > I tried to change the ESS default R history to a permanent file so
> > that ESS does not generate .Rhistory everywhere. I tried both
> >
> > (setq ess-history-directory "~/.R/history")
> >
> > and
> >
> > (setq ess-history-file "~/.R/history/.Rhistory")
> 
> If I recall correctly, it's because of the way the ess-history-file
> variable is set in the ESS code.  The following works for me:
> 
>   (defun ei-no-rhistory ()
>     (setq ess-history-file "/dev/null"))
> 
>   (add-hook 'inferior-ess-mode-hook 'ei-no-rhistory)
> 
> 
> where "ei" in the function name is just my initials.  See if that
> works for you. You can change /dev/null to whatever you want.  There
> may be a cleaner solution, but I was just happy not to find .Rhistory
> files all over the place, which bother me greatly for some unknown
> reason :).
> 
> --Erik
> 
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