bug#57639: [PATCH] Add new command 'toggle-theme'

[Philip Kaludercic <philipk@posteo.net>]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Philip Kaludercic <philipk@posteo.net> writes:
>
>> Ok, that sounds good.  Here is the updated patch:
>
> [...]
>
>> This is actually done a few times by the modus themes and at least once
>> by `leuven-dark' (see `leuven-dark-scale-font', tough I don't see why,
>> and if the autoloads aren't being generated to begin with the cookie is
>> pointless anyway).
>> 
>> Should this be addressed before the patch is pushed?
>
> Hm...  are these themes also distributed via ELPA or something?  But in
> any case, I don't see why you'd have:

Modus-themes is distributed via GNU ELPA, and Leuven via MELPA.  I
didn't modify Modus-themes because I know it is sync'ed back regularly,
but now that I think about it I don't know if I ought to have changed
those either...

> ;;;###autoload
> (defun leuven-dark-scale-font (control default-height)
>
> If you've activated the theme, you've loaded the file, so autoloading a
> function like that doesn't seem helpful in any case.
>
> So I think that sounds like it's just a mistake, and the ;;;###autoload
> should be removed.  And the same with the commands autoloaded in modus
> themes?  But perhaps there's a reason; I've added Prot to the CCs.
> Perhaps he can clarify why those autoloads are in modus*.el.
>
> But this looks more problematic:
>
> ;;;###autoload
> (when (and (boundp 'custom-theme-load-path)
>            load-file-name)
>   ;; Add theme folder to `custom-theme-load-path' when installing over MELPA.
>   (add-to-list 'custom-theme-load-path
>                (file-name-as-directory (file-name-directory load-file-name))))
>
> We don't want that in the Emacs loaddefs file, so just adding etc/themes
> to our Makefile won't be the right thing to do, and we have to find a
> different way to fix this.
>
> Uhm...  Uhm...  I don't immediately see a good way to fix this...

There probably is not automatic way to resolve this issue, but perhaps
it might be enough to remind all the external theme maintainers to
remove these snippets before updating the files in emacs.git.