Re: Bug or not a bug? dot expansion in ob-shell

[Bastien <bzg@gnu.org>]

Hi Tim,

thanks for your proposal.  I think we agree here.

My suggestion is to have a new option ob-shell-value-is-exit-status.

When set to nil (the default), the "return value" of a shell source
block would be the output of the last command.  This is the current
behavior where we have e.g.

  #+begin_src shell
  echo "Hello!"
  #+end_src
  
  #+RESULTS:
  : Hello!

When set to t, the return value of a shell source block would be the
exit code of the last command.  This would be useful for side effect
and other use cases.

We can also consider a specific parameter :value-is-exit-code to set
for individual blocks--useful for noweb.

My only point is I don't think ob-shell-value-is-exit-status should be
t by default, as it would cause all shell blocks to return the status
code by default, which may not be what most users want.

Anyway, I don't have yet a clue on how to add this new option.  I'll
leave it to Eric first (if he has time) then look at it later this
week.

Thanks!

-- 
 Bastien