[ESS] Feature request -- start R automagically

[Vincent Goulet]

Le jeu. 29 mai à 04:17, Martin Maechler a écrit :

>>>>>> "MM" == Martin Maechler <maechler at stat.math.ethz.ch>
>>>>>>    on Mon, 26 May 2008 15:29:02 +0200 writes:
>
>    VG> Le sam. 24 mai à 04:53, Martin Maechler a écrit :
>>>> Salut Vincent, (et al)
>>>>>>>>> "VG" == Vincent Goulet
>>>>>>>>> <vincent.goulet at act.ulaval.ca> on Fri, 23 May 2008
>>>>>>>>> 09:03:41 -0400 writes:
>>>>
>    VG> Hi Martin, Le ven. 23 mai à 02:45, Martin Maechler a
>    VG> écrit :
>>>>
>>>>>>>>>>> "MM" == Martin Maechler
>>>>>>>>>>> <maechler at stat.math.ethz.ch> on Fri, 9 May 2008
>>>>>>>>>>> 17:35:56 +0200 writes:
>>>>>>
>>>>>>>>>>> "MR" == Mathieu Ribatet <mathieu.ribatet at epfl.ch>
>>>>>>>>>>> on Thu, 08 May 2008 17:37:32 +0200 writes:
>>>>>>
>    MR> Dear list, Will it be possible to add the following
>    MR> request.  When running emacs with a R script file (or
>    MR> any other source
>>>>>> file) and
>    MR> trying to C-c C-r a region while no R process is
>    MR> running, you
>>>>>> get the
>    MR> following message "Process R is not running".
>>>>>>
>    MR> I think it may be convenient if then ESS propose you to
>>>>>> launch a new R
>    MR> process.
>>>>>>
>    MM> I agree, and I had added this feature already a few
>    MM> months ago in a different context (Sweave editing) on
>    MM> 2007-05-03 { according to lisp/Changelog }.
>>>>>>
>    MM> I hope to find time to hack this during the prolonged
>>>>>> Pentecoste
>    MM> weekend.
>>>>>>
>>>>>> and I did not have time then, but last night.
>>>>>>
>>>>>> I've commited a change to ESS' development version
>>>>>> which automatically starts R if - you are editing an S
>>>>>> language buffer [ ess-language is "S" ] which should be
>>>>>> the case for all R source files - if your buffer has no
>>>>>> associated ess process.
>>>>
>    VG> Shouldn't it be "if there is no *running* ess process" ?
>>>>
>>>> well, that's yet another feature request !  :-) which
>>>> makes sense, but is not yet implemented.
>
>    VG> Well, this is how I interpreted the original
>    VG> request. ;-)
>
>    MM> no problem.
>
>    VG> This is how I understood your change mentioned above:
>    VG> ESS will spawn a new S process as soon as we try to
>    VG> execute code in an S buffer that is not already
>    VG> associated with an ess process --- regardless if there
>    VG> is an ess process already running. If I'm correct, I'm
>    VG> not sure I like this feature.
>
>    MM> Ahh, I'm curious. Why not?
>
> Ok, I've now re-read more carefully what you (Vincent) wrote
> above.
> No, the new feature is not what you fear.
>
> A new R is only started if there is no process running at all.
> Otherwise the S-language buffer (e.g. foobar.R ) should
> automatically be associated with the already running process.

Ahh, ok then. So there was just some misunderstanding on both sides, I  
guess.

>    MM> If this seems a bit controversial, we of course should give the
>    MM> users an easy option to disable the new feature(s).
>    MM> This has to wait for a few days though.
>
> {I haven't found the time // seen the necessity to make this a
> customizable option}

Indeed.

Vincent

> Martin
>
>
>    VG> Thanks for your work on this.
>
>    MM> You're welcome.
>    MM> Martin
>
>    VG> Vincent
>
>>>>
>>>>
>>>> I'll see if I can implement it "quickly".  Martin
>>>>
>    VG> Vincent
>>>>
>>>>>>
>>>>>
>>>>> Consequently, this feature will be in ESS 5.3.8
>>>>>
>>>>> Martin Maechler, ETH Zurich