bug#62767: 29.0.90; [PATCH] *lisp/emacs-lisp/package.el: set variables after info package

[Ruijie Yu]

lin Sun via "Bug reports for GNU Emacs, the Swiss army knife of text editors" 
<bug-gnu-emacs@gnu.org> writes:

> Hi Philip,
>
> I had researched these three calls with the "require 'info", and
> updated the patch for better performance.
> The 1 th and 3rd can be rewritten with the new form, but the 2nd one
> is necessary, and should not be changed.

> @@ -4427,7 +4426,7 @@ package-quickstart-refresh
>    "(Re)Generate the `package-quickstart-file'."
>    (interactive)
>    (package-initialize 'no-activate)
> -  (require 'info)
> +  (require 'info) ; insure Info-directory-list avaliable for package-activate

"insure" -> "ensure"?

>    (let ((package--quickstart-pkgs ())
>          ;; Pretend we haven't activated anything yet!
>          (package-activated-list ())
> @@ -4472,10 +4471,10 @@ package-quickstart-refresh
>            (current-buffer))
>        (let ((info-dirs (butlast Info-directory-list)))
>          (when info-dirs
> -          (pp `(progn (require 'info)
> -                      (info-initialize)
> -                      (setq Info-directory-list
> -                            (append ',info-dirs Info-directory-list)))
> +          (pp `(with-eval-after-load 'info
> +                 (info-initialize)
> +                 (setq Info-directory-list
> +                       (append ',info-dirs Info-directory-list)))
>                (current-buffer))))

I did some testing, and noticed that `with-eval-after-load' returns nil
to its caller when the feature is not loaded.  That is, when `info' is
not already loaded, you are effectively calling (pp nil).  This is not
feature-equivalent to the original code, so this might require the
`require' form.

-- 
Best,


RY