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bug#63276: Allow channels to depend on a past Guix revision / private de
From: |
Simon Tournier |
Subject: |
bug#63276: Allow channels to depend on a past Guix revision / private dependencies |
Date: |
Thu, 04 May 2023 21:09:35 +0200 |
Hi Maxim,
Well, part of the message is in: :-)
875y987z1m.fsf@gmail.com">https://issues.guix.gnu.org/msgid/875y987z1m.fsf@gmail.com
On Thu, 04 May 2023 at 11:52, Maxim Cournoyer <maxim.cournoyer@gmail.com> wrote:
> It seems a valid use case to have a channel that depends on an old Guix
> version. Should this be supported?
>
> If I could for example use the following channel dependency file at the
> level of the channel in a .guix-channel, to depend on an older Guix
> revision:
>
> --8<---------------cut here---------------start------------->8---
> (channel
> (version 0)
> (dependencies
> (channel
> (inherit %default-guix-channel)
> (commit "9ed65e6af77893b658a7159b091b5002892c2f95"))))
> --8<---------------cut here---------------end--------------->8---
You want complete channel depends on a previous Guix, right?
Somehow, it would become equivalent to this channels.scm
(list (channel
(name 'guix)
(url "https://git.savannah.gnu.org/git/guix.git")
(branch "master")
(commit
"9ed65e6af77893b658a7159b091b5002892c2f95"))
(channel
(name 'sfl)
(url "file:///tmp/sfl-guix-channel")
(branch "master"))))
and then run “guix pull && guix build sflvault-client” or:
guix time-machine -C channels.scm -- shell sflvault-client
Well, I do not know if it is desirable. Most of the time, I only want
one specific package from one specific Guix revision.
> As a workaround, I can define a 'python-pycryto*' in the channel itself,
> although that's kind of silly because it can only be used with a Guix
> inferior pegged to commit 9ed65e6af77893b658a7159b091b5002892c2f95,
> which does contain 'python-pycryto'.
Well, I do not know if we are using the time-travel the same way. :-)
Considering this:
(define-public foo
(package
(name "foo")
(inputs
(list bar)
(list baz))))
Most of the time, I want to build ’foo’ using a recent Guix but that
recent Guix removed ’bar’ so I want to pick it up from an inferior.
And let say I want ’baz’ from another Guix revision because some
specific version of ’baz’ is required for building ’foo’.
Basically, I am tempted to define the symbol ’bar’ and ’baz’ in my
channel and bind them to some inferior packages (here from 2 Guix
revisions).
Well, the number of inferiors should not be too much. And it requires
some care about the propagated inputs.
Cheers,
simon