Re: with-editor seems like a bug fix

[Manuel Giraud via "Emacs development discussions." <emacs-devel@gnu.org>]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Richard Stallman <rms@gnu.org>
>> Date: Wed, 26 Jun 2024 23:07:14 -0400
>> 
>> What with-editor does seems like a bug fix to me, not like a feature.
>> It really ought to be standardly enabled in Emacs whenever the Emacs
>> client is.
>
> If someone can explain what is/are the bug(s) and show a recipe for
> reproducing it/them, we will fix it, yes.

I said it in september 2023 and I don't know if it's a bug that needs a
fix but here is recipe of what 'with-editor' does well and could be
useful:

   - C-x C-f /ssh:remote-server|su::
   - M-x eshell
   - vipw  --> and here it works, opening an Emacs buffer through
               emacsclient so I could edit and C-c C-c when done

Note that:
   - EDITOR is set to "emacsclient" on the localhost
   - Emacs/emacsclient is not installed on remote-server

It seems that 'with-editor' does that with the following shell hackery
into $EDITOR on the remote server:

sh -c 'printf "\nWITH-EDITOR: $$ OPEN $0\037$1\037 IN $(pwd)\n"; sleep
604800 & sleep=$!; trap "kill $sleep; exit 0" USR1; trap "kill $sleep;
exit 1" USR2; wait $sleep'

So maybe that is what we need in Emacs if we want this feature.
-- 
Manuel Giraud