From: Stefan Monnier <monnier@iro.umontreal.ca>
To: emacs-devel@gnu.org
Subject: Re: Summary and next steps for (package-initialize)
Date: Fri, 25 Aug 2017 07:51:32 -0400 [thread overview]
Message-ID: <jwvtw0v50sq.fsf-monnier+gmane.emacs.devel@gnu.org> (raw)
In-Reply-To: 83shgg6t4q.fsf@gnu.org
> What about packages that include accommodations to, and dependencies
> on, other packages? Imagine the following situation:
>
> . package B modifies its behavior if package A is loaded
> . the user sets up package-load-list such that package B should be
> loaded, but package A should not be
> . package B is activated by package-initialize after package A was
> activated, so B modifies its behavior
> . package-initialize unloads A
> . the result is that B behaves as if A is loaded, contrary to what
> the user wanted, and will probably produce weird errors at some
> point, or subtly incorrect behavior
>
> I don't think we can claim in this case that there's a bug in either
> of these two packages, can we? Or is there a way for the packages to
> be prepared for such situations?
[ Note: in the above "package A" and "package B" really refer to
the files A-autoload.el and B-autoload.el, which aren't really
"packages". I'll try to be more precise below. ]
I guess B-autoload.el could add a function to a "A-autoload-unload-hook".
But things can get worse: B-autoload.el could not only behave differently
depending on whether A-autoload.el was loaded, but it could also cause
A.el to be loaded, in which case unloading A-autoload.el won't
be sufficient, unless we arrange for the unloading of A-autoload.el to
also unload A.el.
Again, here we're back to the obvious observation that do+undo is a poor
and complicated way to do nothing.
Stefan
next prev parent reply other threads:[~2017-08-25 11:51 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-20 2:38 Summary and next steps for (package-initialize) Radon Rosborough
2017-08-20 6:10 ` Drew Adams
2017-08-20 17:20 ` Radon Rosborough
2017-08-20 18:09 ` Drew Adams
2017-08-20 18:39 ` Radon Rosborough
2017-08-21 0:33 ` Drew Adams
2017-08-21 4:08 ` Radon Rosborough
2017-08-20 8:13 ` Stefan Monnier
2017-08-20 17:21 ` Radon Rosborough
2017-08-20 8:15 ` Clément Pit-Claudel
2017-08-20 17:21 ` Radon Rosborough
2017-08-20 14:20 ` Eli Zaretskii
2017-08-20 16:37 ` Alex
2017-08-20 16:44 ` Eli Zaretskii
2017-08-20 16:46 ` Yuri Khan
2017-08-20 16:54 ` Drew Adams
2017-08-20 17:18 ` Colin Baxter
2017-08-22 21:24 ` Alex
2017-08-20 17:22 ` Radon Rosborough
2017-08-20 17:36 ` Eli Zaretskii
2017-08-20 17:54 ` Radon Rosborough
2017-08-21 16:35 ` Eli Zaretskii
2017-08-21 16:43 ` Radon Rosborough
2017-08-21 17:40 ` Eli Zaretskii
2017-08-21 20:33 ` Radon Rosborough
2017-08-22 2:37 ` Eli Zaretskii
2017-08-22 4:52 ` Radon Rosborough
2017-08-22 8:41 ` Clément Pit-Claudel
2017-08-22 16:02 ` Radon Rosborough
2017-08-22 14:33 ` Eli Zaretskii
2017-08-22 18:09 ` Radon Rosborough
2017-08-22 21:01 ` Clément Pit-Claudel
2017-08-21 9:04 ` Stefan Monnier
2017-08-21 14:31 ` Eli Zaretskii
2017-08-21 16:34 ` Radon Rosborough
2017-08-21 17:47 ` Clément Pit-Claudel
2017-08-22 11:37 ` Timur Aydin
2017-08-22 16:58 ` Radon Rosborough
2017-08-22 21:04 ` Clément Pit-Claudel
2017-08-23 5:17 ` Radon Rosborough
2017-08-23 11:33 ` Angelo Graziosi
2017-08-23 17:16 ` Radon Rosborough
2017-08-23 13:28 ` Drew Adams
2017-08-23 17:31 ` Radon Rosborough
2017-08-23 18:00 ` Drew Adams
2017-08-23 18:32 ` Radon Rosborough
2017-08-23 20:27 ` Drew Adams
2017-08-23 20:59 ` Clément Pit-Claudel
2017-08-23 21:21 ` Drew Adams
2017-08-23 21:44 ` Clément Pit-Claudel
2017-08-23 21:53 ` Drew Adams
2017-08-24 0:44 ` Radon Rosborough
2017-08-24 6:39 ` Drew Adams
2017-08-25 1:03 ` Radon Rosborough
2017-08-24 17:14 ` Eli Zaretskii
[not found] ` <<83fucg99cj.fsf@gnu.org>
2017-08-24 17:44 ` Drew Adams
2017-08-24 18:12 ` Clément Pit-Claudel
2017-08-24 18:29 ` Drew Adams
2017-08-24 21:34 ` Clément Pit-Claudel
2017-08-24 21:40 ` Drew Adams
2017-08-25 1:04 ` Radon Rosborough
2017-08-24 18:14 ` Eli Zaretskii
[not found] ` <<83bmn496js.fsf@gnu.org>
2017-08-24 18:36 ` Drew Adams
2017-08-24 18:57 ` Eli Zaretskii
2017-08-25 1:04 ` Radon Rosborough
2017-08-25 1:04 ` Radon Rosborough
2017-08-23 3:15 ` Stefan Monnier
2017-08-24 16:47 ` Eli Zaretskii
2017-08-24 17:48 ` Stefan Monnier
2017-08-24 18:26 ` Eli Zaretskii
2017-08-25 3:52 ` Stefan Monnier
2017-08-25 3:59 ` Radon Rosborough
2017-08-25 4:39 ` Stefan Monnier
2017-08-25 4:45 ` Radon Rosborough
2017-08-25 4:48 ` Stefan Monnier
2017-08-25 6:47 ` Eli Zaretskii
2017-08-25 11:51 ` Stefan Monnier [this message]
2017-08-25 1:04 ` Radon Rosborough
2017-08-25 4:14 ` Stefan Monnier
2017-08-25 4:28 ` Radon Rosborough
2017-08-25 4:47 ` Stefan Monnier
2017-08-25 21:07 ` Stefan Monnier
2017-08-25 21:34 ` Radon Rosborough
2017-08-26 22:29 ` Stefan Monnier
2017-08-26 22:33 ` Radon Rosborough
2017-08-21 16:18 ` Radon Rosborough
2017-08-20 19:09 ` Mark Oteiza
2017-08-23 15:57 ` Nikolay Kudryavtsev
2017-08-23 18:17 ` Radon Rosborough
2017-08-23 19:17 ` Nikolay Kudryavtsev
2017-08-23 19:38 ` Radon Rosborough
2017-08-23 20:09 ` Nikolay Kudryavtsev
2017-08-24 0:13 ` Radon Rosborough
2017-08-24 13:44 ` Nikolay Kudryavtsev
2017-08-25 1:04 ` Radon Rosborough
2017-08-24 17:12 ` Eli Zaretskii
2017-08-23 22:30 ` Nathan Moreau
2017-08-24 0:54 ` Radon Rosborough
2017-08-24 11:13 ` Nathan Moreau
2017-08-24 17:02 ` Eli Zaretskii
2017-08-24 17:52 ` Nikolay Kudryavtsev
2017-08-24 18:31 ` Eli Zaretskii
2017-08-25 13:48 ` Nikolay Kudryavtsev
-- strict thread matches above, loose matches on Subject: below --
2017-08-21 8:24 angelo.g0
2017-08-21 16:22 ` Radon Rosborough
2017-08-21 19:35 ` Angelo Graziosi
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