From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: emacs.scm: Suggest add emacs-next or emacs-snapshot
Date: Sat, 14 Nov 2015 12:32:48 +0100
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References: <11cf533a.13b0.150f91df556.Coremail.tumashu@163.com>
	<87fv0bz8f4.fsf@gnu.org> <87d1vei043.fsf@163.com>
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In-Reply-To: <87d1vei043.fsf@163.com> (Feng Shu's message of "Fri, 13 Nov 2015
	19:56:28 +0800")
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To: Feng Shu <tumashu@163.com>
Cc: guix-devel@gnu.org

"Feng Shu" <tumashu@163.com> skribis:

> ludo@gnu.org (Ludovic Court=C3=A8s) writes:
>
>> tumashu <tumashu@163.com> skribis:
>>
>>> Suggest add emacs-next or emacs-snapshot and let guile-emacs inherit it=
, The reason is that
>>> user can use it build emacs from emacs.git conveniently=EF=BC=8C for ex=
ample:
>>>
>>>     guix build emacs-snapshot --with-source=3D./emacs-snapshot-20151111=
.tar.gz
>>
>> To use --with-source, all you need to do is to rename the tarball to
>> =E2=80=98emacs-20151111.tar.gz=E2=80=99; after that, you can run:
>>
>>   guix build emacs --with-source=3Demacs-20151111.tar.gz
>>
>> That=E2=80=99s because --with-source expects the tarball name to match t=
he
>> package name (info "(guix) Invoking guix build").
>
> I don't think it is a flexible way, i like the below:
>
>     guix build emacs --with-source=3D~/my-own-emacs-dir --override-name=
=3Demacs --override-version=3D20151111

I agree that=E2=80=99s more flexible but that=E2=80=99s also less nice as a=
 UI.

And it=E2=80=99s not as simple as this.  Currently one can do:

  guix build emacs guile \
    --with-source=3Demacs-2123123.tar.gz --with-source=3Dguile-12321.tar.gz

and it does the right thing.

Here we wouldn=E2=80=99t know what package --override-name and
--override-version apply to.

For non-trivial use cases, I would suggest writing a file like this:

  (use-modules (guix) (gnu packages emacs))

  (package
    (inherit emacs)
    (name "emacs-snapshot")
    (source "/path/to/some-file-or-directory.tar.gz"))

and then run:

  guix package --install-from-file=3Dthat-file.scm

WDYT?

Ludo=E2=80=99.