Re: [PATCH] Set Python shell in Org edit buffer

[Ihor Radchenko <yantar92@posteo.net>]

Jack Kamm <jackkamm@gmail.com> writes:

>> Because I am still thinking about the idea with global customization and
>> `org-babel-<lang>-associate-session'.
>
> It's great that you're thinking about this -- it would be nice to have
> better consistency between ob-R, ob-python, etc, and to have better
> configurability on this. In particular, ob-R's behavior to automatically
> start a session is annoying for me, especially when editing on my HPC's
> login node which forbids starting R, python, etc outside of slurm.
>
> However, the most recent version of Liu's patch is very small, and the
> changes should be easy to modify in future, whatever your conclusion on
> `org-babel-<lang>-associate-session'. So I would suggest not to let it
> be blocked by this for too long.

I just do not want to do double work.

I now reverted the obsoletion of org-babel-<lang>-associate-session.
https://git.savannah.gnu.org/cgit/emacs/org-mode.git/commit/?id=99c9cae25
https://git.savannah.gnu.org/cgit/emacs/org-mode.git/commit/?id=b4687fcd6

I also fixed the problem where org-babel-<lang>-associate-session was
never actually executed due to `org-src--babel-info' being set after
`org-src-mode-hook'.

Now, the question is what to do with the existing implementation of
`org-src-associate-babel-session'. It only runs
org-babel-<lang>-associate-session when

(and session (not (string= session "none"))
	 (org-babel-comint-buffer-livep session)
	 (let ((f (intern (format "org-babel-%s-associate-session"
                                  (nth 0 info)))))
           (and (fboundp f) (funcall f session))))

The questionable check here is (org-babel-comint-buffer-livep session) -
it only triggers when session is already initiated, while ob-python and
some other backends do not necessarily need to start a new session to
"associate" it with Org Src buffer.

I am tentatively inclined to change this check to

(or (org-babel-comint-buffer-livep session)
    (eq org-src-auto-initiate-session t)
    (alist-get (nth 0 info) org-src-auto-initiate-session)
    (alist-get 'default org-src-auto-initiate-session))

With `org-src-auto-initiate-session' being a customization that controls
whether to associate session for a given babel backend.

We may set the default value to something like

((default . t) ("R" . nil))

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>