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bug#13824: 24.3.50; :package-version not taking priority over :version
From: |
Eli Zaretskii |
Subject: |
bug#13824: 24.3.50; :package-version not taking priority over :version |
Date: |
Sat, 10 Aug 2019 12:22:02 +0300 |
> From: Stefan Kangas <stefan@marxist.se>
> Date: Thu, 8 Aug 2019 05:59:21 +0200
> Cc: 13824@debbugs.gnu.org
>
> Bastien Guerry <bzg@altern.org> writes:
>
> > The docstring of `defcustom' says:
> >
> > :package-version
> > VALUE should be a list with the form (PACKAGE . VERSION)
> > specifying that the variable was first introduced, or its
> > default value was changed, in PACKAGE version VERSION. This
> > keyword takes priority over :version.
> > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> >
> > but `describe-variable-custom-version-info' gives priority to :version
> > over :package-version. Which one is correct here?
>
> This is still an issue on current master (and 26.2).
>
> I reproduced this using:
>
> (progn
> (defcustom foobar nil
> "foo"
> :version "27.1"
> :package-version '(foo . "1"))
> (describe-variable-custom-version-info 'foobar))
>
> Which results in:
>
> "This variable was introduced, or its default value was changed, in
> version 27.1 of Emacs.
> "
>
> But C-h f defcustom says:
>
> :package-version
> VALUE should be a list with the form (PACKAGE . VERSION)
> specifying that the variable was first introduced, or its
> default value was changed, in PACKAGE version VERSION. This
> keyword takes priority over :version.
The implementation only prefers :package-version for the purposes of
customize-changed-options, i.e. the Options->Customize Emacs->New
Options menu item. By contrast, describe-variable-custom-version-info
is used for displaying the doc strings of options. For a package that
is bundled with Emacs, I think displaying :version in "C-h v" makes
sense. If people agree, then this is a minor documentation bug (also
to be fixed in the ELisp manual), not a code bug.
Bill, what is your take on this? Your change, which introduced this
attribute, only modified customize-changed-options. Was that on
purpose?