Re: Org 9.6-pre and Bash sessions

[Ihor Radchenko <yantar92@posteo.net>]

Rudolf Adamkovič <salutis@me.com> writes:

> Ihor Radchenko <yantar92@posteo.net> writes:
>
>>> I did some testing and found no issues.
>
> Update: Today I needed to run some Bash, and it seems broken.
>
> PROBLEM 1: WITHOUT A SESSION
> ============================
>
> CONFIGURATION:
>
>   Emacs 29, Org from Git (2f5e7103e59f06631e985d3dd39af21b5b7464ea)
>
> REPRODUCTION STEPS:
>
>   Run the following code block:
>   
>   #+begin_src bash :results output
>   echo one > one.txt
>   echo two > two.txt
>   diff one.txt two.txt
>   #+end_src
>   
> ACTUAL RESULTS:
>   
>   #+RESULTS:
>   
> EXPECTED RESULTS:
>   
>   #+RESULTS:
>   : 1c1
>   : < one
>   : ---
>   : > two

This is actually expected. Without session, ob-shell discards results of
src blocks that fail and display *Error* window (empty in this case).

If you try 

  #+begin_src bash :results output
  echo one > one.txt
  echo two > two.txt
  diff one.txt two.txt || true
  #+end_src

things will work as expected.

I guess we can display a bit more info in `org-babel-eval'.

> PROBLEM 2: WITH A SESSION
> =========================
>
> CONFIGURATION:
>
>   Emacs 29, Org from Git (2f5e7103e59f06631e985d3dd39af21b5b7464ea)
>
> REPRODUCTION STEPS:
>
>   #+begin_src bash :session bash :results output
>   echo one > one.txt
>   echo two > two.txt
>   diff one.txt two.txt
>   #+end_src
>
> ACTUAL:
>   
>   #+RESULTS:
>   : org_babel_sh_prompt> 1c1
>   : < one
>   : ---
>   : > two
>   
> EXPECTED:
>   
>   #+RESULTS:
>   : 1c1
>   : < one
>   : ---
>   : > two

Confirmed.
I know what is the problem. It is comint sometimes throwing output
without newlines, which leads to comint-prompt-regexp not matching all
the prompts after concatenating. Will take a look tomorrow.

> ADDENDUM
> ========
>
> A friend of mine, who uses Org that comes with Emacs 28.1 on Linux,
> tried the PROBLEM 1 source block shown above, the one *without* a
> session, and he got no results either.
>
> (We might need better tests.)

Better tests are always needed :)
https://orgmode.org/list/874k81bsvz.fsf@localhost

-- 
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>