alternatives is forgetful?

[Tom Horsley]

I've always set my emacs alternatives to lucid emacs. Today I
did a big dnf update, rebooted to get new kernel, and then got
an error when I started emacs about the "pure GTK" version
not operating correctly under X11 (one of the reasons I use
lucid).

Why did my alternatives config setting revert?

Anyway, I've now removed all versions except lucid. Maybe
that will make it stick :-).

[Go Canes]

On Fri, Jun 28, 2024 at 3:20 PM Tom Horsley  wrote:
> I've always set my emacs alternatives to lucid emacs. Today I
> did a big dnf update, rebooted to get new kernel, and then got
> an error when I started emacs about the "pure GTK" version
> not operating correctly under X11 (one of the reasons I use
> lucid).
>
> Why did my alternatives config setting revert?

I have my "alternatives" set to emacs-nox, but updates frequently
change it back to emacs.  Too lazy to figure out why....

[Jerry James]

On Fri, Jun 28, 2024 at 1:55 PM Go Canes  wrote:
> On Fri, Jun 28, 2024 at 3:20 PM Tom Horsley  wrote:
> > I've always set my emacs alternatives to lucid emacs. Today I
> > did a big dnf update, rebooted to get new kernel, and then got
> > an error when I started emacs about the "pure GTK" version
> > not operating correctly under X11 (one of the reasons I use
> > lucid).
> >
> > Why did my alternatives config setting revert?
>
> I have my "alternatives" set to emacs-nox, but updates frequently
> change it back to emacs.  Too lazy to figure out why....

$ rpm -q --scripts emacs
preuninstall scriptlet (using /bin/sh):
/usr/sbin/alternatives --remove emacs /usr/bin/emacs-29.4 || :
posttrans scriptlet (using /bin/sh):
/usr/sbin/alternatives --install /usr/bin/emacs emacs
/usr/bin/emacs-29.4 80 || :

I think that preuninstall scriptlet should instead be:

if [ $1 = 0 ]; then
  /usr/sbin/alternatives --remove emacs /usr/bin/emacs-29.4 || :
fi

See https://docs.fedoraproject.org/en-US/packaging-guidelines/Scriptlets/#_synta....
If that sounds right, a bug report is in order.

[Michael Schwendt]

On Fri, 28 Jun 2024 13:59:32 -0600, Jerry James wrote:
> I think that preuninstall scriptlet should instead be:
>
> if [ $1 = 0 ]; then
>   /usr/sbin/alternatives --remove emacs /usr/bin/emacs-29.4 || :
> fi
>
> See https://docs.fedoraproject.org/en-US/packaging-guidelines/Scriptlets/#_synta....
> If that sounds right, a bug report is in order.

You may want to add that to:
https://bugzilla.redhat.com/2277689

[Jerry James]

On Sun, Jun 30, 2024 at 10:00 AM Michael Schwendt  wrote:
> You may want to add that to:
> https://bugzilla.redhat.com/2277689

I opened https://src.fedoraproject.org/rpms/emacs/pull-request/41 and
mentioned it in that bug.