Re: master c622627: * Clean-up temporary eln test-suite directory when exiting (bug#48060)

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

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Andrea Corallo <akrl@sdf.org>
>> Cc: Eli Zaretskii <eliz@gnu.org>, michael.albinus@gmx.de
>> Date: Thu, 29 Apr 2021 08:29:17 +0000
>> 
>> That said this could help in the file clean-up side of the problem, but
>> IIUC the complain of this thread is the dependency Makefile ->
>> stratup.el.
>
> With that preferred solution, startup.el will not need to be changed,
> will it?
>
>> Than the real question is how should Emacs understand that is being used
>> for a testsuite run so it can use "test/eln-cache/" without any
>> dependency Makefile -> Emacs?
>
> I'm not sure what dependency you are talking about.  What I had in
> mind was to arrange in test/Makefile.in to use that directory for
> *.eln files, via some Lisp variable or environment variable.  This
> way, Emacs will not need to understand it is being run as part of the
> test suite.

Answering both your questions: Emacs will have to understand that in
this condition "test/eln-cache/" has to be pushed to
`comp-eln-load-path'.  To do this as you suggest we could set an
env-var, but this is not much different from what we do now (and IIUC
this is what Michael doesn't like much and was called a dependency).
Also we'd still have to handle this push in startup.el, am I wrong?

Maybe we could have the Emacs invocation in the Makefile changed to
explicitly tweak `comp-eln-load-path' using -eval?

Regards

  Andrea