Re: How to reliably edit a file from within Emacs Lisp and return a string?

[Jean Louis]

* Eli Zaretskii <eliz@gnu.org> [2019-08-24 19:24]:
> > Date: Sat, 24 Aug 2019 19:17:11 +0200
> > From: Jean Louis <bugs@gnu.support>
> > Cc: help-gnu-emacs@gnu.org
> > 
> > > > > § emacsclient "file"
> > > > > 
> > > > > it works here inside of M-x shell where it says "Waiting for
> > > > > Emacs..."
> > > > > 
> > > > > So I can launch emacsclient from shell within Emacs with waiting
> > > > > stage.
> > > > 
> > > > Yes, but this won't get you anywhere past the waiting stage, because
> > > > there's no Emacs server that can serve the emacsclient's request.
> > > 
> > > Actually, you know what: it will work.  So if you insist on doing it
> > > via emacsclient, go ahead and do it via the shell buffer.
> > 
> > I have strong feeling that it can work. Please give me better
> > specification. Which function you propose?
> 
> I don't understand the question.  I thought you have already figured
> everything out for doing this via emacsclient.  Otherwise, why did you
> keep asking about emacsclient all the time?

I have three possible directions to solve that:

- use recursive-edit, if it would not interrupt while calling
  emacsclient in the same time, is that a bug?

- use simple editing of buffer with kill-buffer-hook, if I can come
  back to initial program execution, as program execution must be wait
  for editing to finish, I do not know how

- use emacsclient from external program somehow, provided that I can
  wait for it to finish

Jean