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Re: [bug#42738] [PATCH v4] gnu: emacs: Update to 27.1.
From: |
Ludovic Courtès |
Subject: |
Re: [bug#42738] [PATCH v4] gnu: emacs: Update to 27.1. |
Date: |
Mon, 07 Sep 2020 11:00:32 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) |
Hi Mark,
Mark H Weaver <mhw@netris.org> skribis:
> Ludovic Courtès <ludo@gnu.org> wrote:
>> Mark H Weaver <mhw@netris.org> skribis:
>>
>>> (define-public emacs-next
>>> (let ((commit "c36c5a3dedbb2e0349be1b6c3b7567ea7b594f1c")
>>> (revision "0")
>>> (emacs-version "27.0.91"))
>>> (package
>>> (inherit emacs)
>>> (name "emacs-next")
>>> (version (git-version emacs-version revision commit))
>>> (source
>>> (origin
>>> (inherit (package-source emacs))
>>> (method git-fetch)
>>> (uri (git-reference
>>> (url "https://git.savannah.gnu.org/git/emacs.git")
>>> (commit commit)))
>>
>> This can be handled with ‘--with-git-url’.
>
> I think that wouldn't work in this case, because we also need to
> preserve the existing 'patches' and 'snippet' fields, which I arranged
> to inherit above via (inherit (package-source emacs)). That probably
> deserves a comment, since it's easily overlooked.
>
>>> (sha256
>>> (base32 "0mlrg2npy1r79laahkgzhxd1qassfcdz8qk1cpw7mqgf6y5x505h"))
>>> (file-name (git-file-name name version))))
>>> (native-inputs
>>> `(("autoconf" ,autoconf) ; needed when building from trunk
>>> ,@(package-native-inputs emacs)))
>>
>> For this, we’d need a new ‘--with-extra-input’ package transformation
>> option or similar. That way, we wouldn’t even need an ‘emacs-next’
>> package: people would just run
>>
>> guix install emacs --with-git-url=… --with-extra-input=autoconf
>
> There's also the 'native-search-paths' field, which cannot simply be
> inherited because of the version number embedded within EMACSLOADPATH.
> This particular issue could be avoided if the 'native-search-paths'
> field were a function of the version number, but that raises migration
> issues and I'm not sure it's worth it.
>
> What do you think?
Ah yes, both good points that I had overlooked.
Thanks,
Ludo’.
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Ludovic Courtès <=