Liliana schrieb am Samstag der 25. Dezember 2021 um 11:15 +01:

> Am Samstag, dem 25.12.2021 um 10:44 +0100 schrieb Xinglu Chen:
>> Liliana schrieb am Freitag der 24. Dezember 2021 um 13:17 +01:
>> 
>> > Am Freitag, dem 24.12.2021 um 12:25 +0100 schrieb Xinglu Chen:
>> > > * elpa.scm (latest-release): Determine the repository based on
>> > > the URL of the source.
>> > > (package-from-gnu.org?): Rename to ...
>> > > (package-from-gnu.org-or-nongnu.org?): ...this.
>> > > (%elpa-updater): Adjust accordingly.
>> > > ---
>> > >  guix/import/elpa.scm | 13 +++++++++----
>> > >  1 file changed, 9 insertions(+), 4 deletions(-)
>> > > 
>> > > diff --git a/guix/import/elpa.scm b/guix/import/elpa.scm
>> > > index edabb88b7a..038379e01b 100644
>> > > --- a/guix/import/elpa.scm
>> > > +++ b/guix/import/elpa.scm
>> > > @@ -424,7 +424,11 @@ (define (guix-package->elpa-name package)
>> > >  (define (latest-release package)
>> > >    "Return an <upstream-release> for the latest release of
>> > > PACKAGE."
>> > >    (define name (guix-package->elpa-name package))
>> > > -  (define repo 'gnu)
>> > > +  (define repo
>> > > +    (let ((url (origin-uri (package-source package))))
>> > > +      (if (string-prefix? "https://elpa.nongnu.org" url)
>> > > +          'nongnu
>> > > +          'gnu)))
>> > >  
>> > >    (match (elpa-package-info name repo)
>> > >      (#f
>> > > @@ -443,11 +447,12 @@ (define repo 'gnu)
>> > >          (urls (list url))
>> > >          (signature-urls (list (string-append url ".sig"))))))))
>> > >  
>> > > -(define package-from-gnu.org?
>> > > +(define package-from-gnu.org-or-nongnu.org?
>> > >    (url-predicate (lambda (url)
>> > >                     (let ((uri (string->uri url)))
>> > >                       (and uri
>> > > -                          (string=? (uri-host uri)
>> > > "elpa.gnu.org"))))))
>> > > +                          (or (string=? (uri-host uri)
>> > > "elpa.gnu.org")
>> > > +                              (string=? (uri-host uri)
>> > > "elpa.nongnu.org")))))))
>> > >  
>> > >  (define %elpa-updater
>> > >    ;; The ELPA updater.  We restrict it to packages hosted on
>> > > elpa.gnu.org
>> > > @@ -455,7 +460,7 @@ (define %elpa-updater
>> > >    (upstream-updater
>> > >     (name 'elpa)
>> > >     (description "Updater for ELPA packages")
>> > > -   (pred package-from-gnu.org?)
>> > > +   (pred package-from-gnu.org-or-nongnu.org?)
>> > >     (latest latest-release)))
>> > >  
>> > >  (define elpa-guix-name (cut guix-name "emacs-" <>))
>> > > 
>> > > base-commit: e8c1562599c7ebee8b7b228237fb0d75d4472a61
>> > Could we make it so that package-from-gnu.org? becomes elpa-
>> > package? s.t. (member (elpa-package? pkg) '(gnu nongnu #f)) and its
>> > evaluation can be reused?
>> 
>> Wouldn’t it be enough with just '(gnu nongnu)?
>> 
>> We could make the ‘elpa-package?’ procedure memoized to avoid
>> evaluating the same thing twice.
> The reason for #f is so that packages that are neither from GNU nor
> NonGNU ELPA are still excluded from the updater.

I am not sure I follow.  If ‘elpa-package?’ returned #f, the following
would return #f.

  (member (elpa-package? pkg) '(gnu nongnu))

Meaning that PKG is not hosted on GNU or NonGNU ELPA, and thus, should
not be checked for updates.

When including #f in the list, the value returned by the ‘member’
expression would be '(#f), which means that PKG would be checked for
updates, even though it shouldn’t.