[PATCH] build-system: emacs: Use new function for autoloads generation

'loaddefs-generate' to create autoloads instead of

'update-directory-autoloads' if we are using a new enough Emacs

---

I'm not sure how long it takes to rebuild all the Emacs packages so I CC'd Liliana since they are going to change the Emacs build system soon anyways.

This change is to allow packages to be built with the latest commits of emacs (guix build emacs-crdt --with-input=emacs-minimal=emacs-next --with-latest=emacs-next)

Just last week the 'update-directory-autoloads' function got deprecated and replaced. Since continuing to use the deprecated function would require changes anyways (adding a '(require 'autoloads)' would do it I think), I decided to just use the newer function.

Is this a bug in upstream Emacs where autoloaded functions like 'update-directory-autoloads' don't get autoloaded when they are in the obsolete directory? Possibly. Is this a bug related to our packaging of Emacs? Possibly. Is this the intended behaviour? Possibly. I'm not the guy to ask :P. I'm really not sure why this stopped working. But we will have to switch to the 'loaddefs-generate' function eventually anyways so I think this patch is probably good to apply.

Thanks,

Morgan

guix/build/emacs-utils.scm | 6 +++++-

1 file changed, 5 insertions(+), 1 deletion(-)

Am Mittwoch, dem 10.08.2022 um 13:37 -0400 schrieb

Morgan.J.Smith@outlook.com:

I can tack that onto native-comp no problem. I can't recall the time

it took to rebuild everything for the last big upgrade, but it's

definitely something to do for fun and a little heat in winter.

Can we instead use make-directory-autoloads or has that also been

deprecated in 29? make-directory-autoloads exists since Emacs 28.1 and

seems to have the same signature as loaddefs-generate. Any reason to

prefer the latter?

Cheers

Liliana Marie Prikler <liliana.prikler@gmail.com> writes:

make-directory-autoloads is in autoloads.el which has been moved to a

directory named "obsolete" but the function itself hasn't been marked

obsolete. I'm not really sure what that means but it looks like all the

autoloads stuff is being deprecated in favor of the newer loaddef stuff

So the FreeBSD guys had the same issue but actually bothered to notify

upstream so the issue has been fixed:

That doesn't mean we shouldn't look into using a non-deprecated function

though. Earlier I did try to use 'package-generate-autoloads' as that

seems like the ideal function to use but it adds the following string to

the loaddefs file:

"(add-to-list 'load-path (directory-file-name

(or (file-name-directory #$) (car load-path))))"

This line would probably work fine but for some reason when I tried it,

it didn't properly substitute '#$' with the file name. I'm not really

sure how to fix that.

Am Donnerstag, dem 18.08.2022 um 08:43 -0400 schrieb Morgan Smith:

Is "#$" a literal string? You might want to substitute* the correct

directory in there after running package-generate-autoloads.

As for make-directory-autoloads vs. loaddefs-generate, IIRC both have

the same signature, so you could make this work with both the non-

deprecated function in Emacs 28 and the new one added in Emacs 29.

Cheers