GNU bug report logs - #65740
No fallback to SWH for .guix-channel dependencies

Previous Next

To add a comment to this bug, you must first unarchive it, by sending
a message to control AT debbugs.gnu.org, with unarchive 65740 in the body.
You can then email your comments to 65740 AT debbugs.gnu.org in the normal way.

Toggle the display of automated, internal messages from the tracker.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Simon Tournier <zimon.toutoune <at> gmail.com>
To: bug-guix <at> gnu.org
Subject: No fallback to SWH for .guix-channel dependencies
Date: Mon, 04 Sep 2023 19:09:39 +0200

Hi,

Consider this channels.scm file:

--8<---------------cut here---------------start------------->8---
$ cat /tmp/channels.scm
(list (channel
        (name 'guix)
        (url "https://git.savannah.gnu.org/git/guix.git")
        (branch "master")
        (commit
          "710d9050524213a83e4ce9efe9765d7fbc233839"))
      (channel
        (name 'bimsb)
        (url "https://github.com/BIMSBbioinfo/guix-bimsb.git")
        (branch "master")
        (commit
          "240a599f77dab7dcb8d2ed091b90056e58a46c51")))
--8<---------------cut here---------------end--------------->8---

Then, assume Github is down forever.  Guix will lookup to Software
Heritage (SWH) for the channel bimsb.  So far, so good.  However, then
it fails:

--8<---------------cut here---------------start------------->8---
$ guix time-machine -C /tmp/channels.scm -- describe
Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.org/git/guix.git'...
Updating channel 'bimsb' from Git repository at 'https://github.com/BIMSBbioinfo/guix-bimsb.git'...
/tmp/channels.scm:95:6: warning: channel 'bimsb' lacks 'introduction' field but '.guix-authorizations' found
Updating channel 'guix-past' from Git repository at 'https://gitlab.inria.fr/guix-hpc/guix-past'...
guix time-machine: error: Git error: failed to resolve address for gitlab.inria.fr: Name or service not known
--8<---------------cut here---------------end--------------->8---

The main reason is because the channel bimsb contains the file
.guix-channel which reads,

--8<---------------cut here---------------start------------->8---
(channel
 (version 0)
 (dependencies
  (channel
   (name guix-past)
   (url "https://gitlab.inria.fr/guix-hpc/guix-past"))
  (channel
   (name guix-science)
   (url "https://github.com/guix-science/guix-science.git"))))
--8<---------------cut here---------------end--------------->8---

And Guix is not able to fallback to SWH for these channels.

Corollary, even if it was able, what is the correct revision of
the guix-past or guix-science channels?

This report is about two bugs:

 1. transparent fallback to SWH for .guix-channel dependencies

 2. pin all channels when running “guix describe”, even the ones from
   .guix-channel dependencies.

This #2 is annoying because it makes the workflow:

    guix time-machine -C channels.scm -- shell -m manifest.scm

unpractical when user relies on channels with dependencies.

Cheers,
simon

Message #8 received at 65740 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: Simon Tournier <zimon.toutoune <at> gmail.com>
Cc: 65740 <at> debbugs.gnu.org
Subject: Re: bug#65740: No fallback to SWH for .guix-channel dependencies
Date: Fri, 08 Sep 2023 22:40:27 +0200

Hi,

Simon Tournier <zimon.toutoune <at> gmail.com> skribis:

> The main reason is because the channel bimsb contains the file
> .guix-channel which reads,
>
> (channel
>  (version 0)
>  (dependencies
>   (channel
>    (name guix-past)
>    (url "https://gitlab.inria.fr/guix-hpc/guix-past"))
>   (channel
>    (name guix-science)
>    (url "https://github.com/guix-science/guix-science.git"))))
>
> And Guix is not able to fallback to SWH for these channels.

Yes, but that’s expected: we’re not specifying any commit, only the URL,
so there cannot be any sort of fallback.

> Corollary, even if it was able, what is the correct revision of
> the guix-past or guix-science channels?
>
> This report is about two bugs:
>
>  1. transparent fallback to SWH for .guix-channel dependencies
>
>  2. pin all channels when running “guix describe”, even the ones from
>    .guix-channel dependencies.

#1 happens, but only when channels are pinned (returned by ‘guix
#describe’).

Re #2, I don’t think there’s such a bug, is there?  In the example
below, ‘guix describe’ shows 4 channels (including dependencies), not 2:

--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guix time-machine -C <(echo '(cons (channel (name (quote bimsb)) (url "https://github.com/BIMSBbioinfo/guix-bimsb.git")) %default-channels)') -- describe -f channels

[...]

(list (channel
        (name 'guix)
        (url "https://git.savannah.gnu.org/git/guix.git")
        (branch "master")
        (commit
          "4dd33fc62899134606f36f92594cf160b972f685")
        (introduction
          (make-channel-introduction
            "9edb3f66fd807b096b48283debdcddccfea34bad"
            (openpgp-fingerprint
              "BBB0 2DDF 2CEA F6A8 0D1D  E643 A2A0 6DF2 A33A 54FA"))))
      (channel
        (name 'bimsb)
        (url "https://github.com/BIMSBbioinfo/guix-bimsb.git")
        (branch "master")
        (commit
          "240a599f77dab7dcb8d2ed091b90056e58a46c51"))
      (channel
        (name 'guix-science)
        (url "https://github.com/guix-science/guix-science.git")
        (branch "master")
        (commit
          "1ad5192cff0d7b34a2f74592c6896f901d1c9ccd"))
      (channel
        (name 'guix-past)
        (url "https://gitlab.inria.fr/guix-hpc/guix-past")
        (branch "master")
        (commit
          "1e25b23faa6b1716deaf7e1782becb5da6855942")))
--8<---------------cut here---------------end--------------->8---

Thanks,
Ludo’.

Message #13 received at 65740-done <at> debbugs.gnu.org (full text, mbox):

From: Simon Tournier <zimon.toutoune <at> gmail.com>
To: Ludovic Courtès <ludo <at> gnu.org>
Cc: 65740-done <at> debbugs.gnu.org
Subject: Re: bug#65740: No fallback to SWH for .guix-channel dependencies
Date: Sat, 09 Sep 2023 12:04:23 +0200

Hi,

On Fri, 08 Sep 2023 at 22:40, Ludovic Courtès <ludo <at> gnu.org> wrote:

>> This report is about two bugs:
>>
>>  1. transparent fallback to SWH for .guix-channel dependencies
>>
>>  2. pin all channels when running “guix describe”, even the ones from
>>    .guix-channel dependencies.
>
> #1 happens, but only when channels are pinned (returned by ‘guix
> #describe’).
>
> Re #2, I don’t think there’s such a bug, is there?  In the example
> below, ‘guix describe’ shows 4 channels (including dependencies), not 2:

My bad!

I had probably not done what I always recommend: “guix describe“.

Sorry for the noise.

Cheers,
simon

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.