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bug#56407: 29.0.50; desktop.el shouldn't be saving/restoring eglot--mana


From: João Távora
Subject: bug#56407: 29.0.50; desktop.el shouldn't be saving/restoring eglot--managed-mode, which is not for interactive use
Date: Wed, 6 Jul 2022 09:12:39 +0100

On Wed, Jul 6, 2022 at 3:29 AM Eli Zaretskii <eliz@gnu.org> wrote:
> From: João Távora <joaotavora@gmail.com>
> Cc: 56407@debbugs.gnu.orgterra@diku.dk
> Date: Tue, 05 Jul 2022 20:53:33 +0100
>
> Eli Zaretskii <eliz@gnu.org> writes:
>
> >> I confirmed this with a stack trace requested from the user and came up
> >> with this workaround in the user's config:
> >>
> >>     (add-to-list 'desktop-minor-mode-handlers
> >>                  '(eglot--managed-mode . ignore))
> >>
> >> This works, but we should come up with something better.
> >
> > But why is the above not good enough?  You could also use
> > desktop-minor-mode-table, which is a defcustom.
>
> At first I thought it was a customization variable and that would make
> it user-specific overwritable etc.  But I see now that evidently it is
> not.  According to the docstring of d-m-m-handlers, eglot.el could just
> just contain the above invocation, indeed.
>
> But that has the downside that eglot.el must require "desktop.el" which
> IMO opinion too strongly couples the two packages.

I see no reason to require: you just add a value to the list, that's
all.

Oh, it's an autoloaded variable.  OK then, it'll work. It'll load in desktop.el
though.

> I think I like Lars's solution best.

I don't: it makes the information spread out and harder to find.

Depends on whether one thinks using the global symbol table in Elisp is
counts as "spread out". I don't.

There's a nice upside to it, which is it prevents people like me not
interested in desktop.el at all from having it autoloaded just by loading
 eglot.el.  The things eglot.el is trying to say to desktop.el is "stay out of
my minor mode" so it is strange that it has to pull in desktop.el every time
just to say that.

João Távora

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