GNU bug report logs - #41145
27.0.91; small issues with `display-fill-column-indicator' Customization group

Previous Next

Full log

Message #17 received at 41145 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Mauro Aranda <maurooaranda <at> gmail.com>,
 Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 41145 <at> debbugs.gnu.org, p.stephani2 <at> gmail.com
Subject: Re: bug#41145: 27.0.91;
 small issues with `display-fill-column-indicator' Customization group
Date: Sat, 29 Aug 2020 09:54:13 +0300

> From: Mauro Aranda <maurooaranda <at> gmail.com>
> Date: Fri, 28 Aug 2020 11:48:57 -0300
> Cc: Philipp Stephani <p.stephani2 <at> gmail.com>, 41145 <at> debbugs.gnu.org
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> >> From: Philipp Stephani <p.stephani2 <at> gmail.com>
> >> Date: Sat, 09 May 2020 10:30:13 +0200
> >>
> >> The two issues here are:
> >>
> >> 1. "Group definition missing."  It looks like customizing this group
> >>    should load `display-fill-column-indicator-mode', which defines this
> >>    group, or the group definition should be in cus-start.el.
> > The same seems to work for display-line-numbers, and I don't think I
> > see the crucial difference.
> 
> I did some debugging and found that the difference is that there are no
> custom options or faces defined in display-fill-column-indicator.el:
> fill-column-indicator is in faces.el and
> display-fill-column-indicator, display-fill-column-indicator-character
> and display-fill-column-indicator-column are in xdisp.c
> 
> custom-make-dependencies doesn't go through faces.el, since it's
> preloaded, so it doesn't record the custom-where property into
> fill-column-indicator.
> And since cus-dep.el doesn't require cus-start, fill-column-indicator is
> the only member of the custom-group property of
> display-fill-column-indicator, so there is no way
> custom-make-dependencies will record the custom-where property into any
> of the options defined in xdisp.c.
> 
> So later on, when looking for a custom-where property in the members of
> the display-fill-column-indicator group, we find nothing, resulting in
> no custom-loads thingy for display-fill-column-indicator.
> 
> The problem goes away if we require cus-start in cus-dep, or if we
> record into the custom-loads the file where to find the custom-group.
> That is, add in the first mapatoms call something like this:
> (when (get symbol 'custom-where)
>   (push (get symbol 'custom-where) found))
> 
> Or if eventually a defface or a defcustom makes its way into
> display-fill-column-indicator.el, of course.
> 
> Note that adding the above form will result in adding cus-edit to the
> custom-loads property of the groups defined in cus-edit (like editing,
> convenience, etc.).  I don't know if that is harmless.

Stefan, any suggestions regarding which solution route is preferable?

Thanks.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.