Re: [BUG] ob-R: session evaluation returns empty ouputs with Org 9.6 [9.6 ( @ /home/fsantos/.emacs.d/elpa/org-9.6/)]

[Berry, Charles]

> On Nov 30, 2022, at 5:48 PM, Ihor Radchenko <yantar92@posteo.net> wrote:
> 
> William Denton <wtd@pobox.com> writes:
> 
>> I tried that, but it didn't fix it. :(
> 
> Ok. I was able to reproduce on my side.
> 
>> With a minimal setup, running the R block with a :session makes it ask where 
>> the 
>> working directory should be (the default in the prompt is the directory the 
>> test 
>> Org file is in).  Setting ess-startup-directory to 'default-directory 
>> doesn't 
>> change that, or the output problem.
> 
> It looks like there is something wrong with comint-prompt-regexp in R
> buffers. It somehow does not match the prompt.
> 
> I will need to look further.
> 

The older (commit bed47b437d8cde7a98bafdb07996e248b40f70e6e) version of 
org-babel-comint-with-output used comint-prompt-regexp and works fine.

I don't really follow how `org-babel-comint-prompt-separator` gets set to 
something useful in the current version. 

Reverting org-babel-comint-with-output to that older commit (and eval-ing the 
defun for org-babel-R-evaluate-session) seems to fix this case for those who 
need `:results output` in R src blocks till this gets sorted out.

HTH,

Chuck