bug#57129: 29.0.50; Improve behavior of conditionals in Eshell

[Jim Porter]

On 8/20/2022 11:14 AM, Eli Zaretskii wrote:
> > Cc: larsi@gnus.org, 57129@debbugs.gnu.org
> > From: Jim Porter <jporterbugs@gmail.com>
> > Date: Sat, 20 Aug 2022 11:03:27 -0700
> >
> > In addition to the changes to temporary file name generation, I think it
> > would be useful for Eshell to kill the temporary buffer too. If you use
> > this feature in Eshell a lot, the temporary buffers could pile up,
> > consuming memory for no real benefit. (A user who wanted the buffer to
> > stick around would probably redirect to a non-temporary file, or even
> > just to a buffer.) Attached is a patch to do this.
>
> That makes sense, of course, but why not use with-temp-buffer in the
> first place?

I'm not sure that would work in this case. 'with-temp-buffer' (or 
probably 'with-temp-file', since we want a real file) would clean 
everything up once BODY has executed, but we want to perform cleanup in 
a hook, which might execute quite a while later (e.g. if passing this 
temp file to an external process).

If there's a way to use that though, I'm all for it.