GNU bug report logs - #67250
builtin:git-download capability detection not working for the bordeaux build farm

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Package: guix; Severity: important; Reported by: Christopher Baines <mail@HIDDEN>; dated Fri, 17 Nov 2023 21:45:02 UTC; Maintainer for guix is bug-guix@HIDDEN.
Severity set to 'important' from 'normal' Request was from Ludovic Courtès <ludo@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
To: Christopher Baines <mail@HIDDEN>
Subject: Re: bug#67250: builtin:git-download capability detection not
 working for the bordeaux build farm
In-Reply-To: <87pm08f41q.fsf@HIDDEN> (Christopher Baines's message of
 "Fri, 17 Nov 2023 21:39:48 +0000")
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Date: Wed, 22 Nov 2023 11:19:42 +0100
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Hi,

Christopher Baines <mail@HIDDEN> skribis:

> The bordeaux build farm depends on computing the derivations on one
> machine, then potentially building them on a different machine.
>
> Some of the build machines don't have a new enough guix-daemon that
> understands builtin:git-download, so derivations that use this are
> sometimes failing (e.g. [1])
>
> 1: https://bordeaux.guix.gnu.org/build/10cc5622-6b1f-4f28-ad9a-41cf796d7a=
15
>
> One potential approach to address this is somehow have the data service
> indicate that it wants compatible derivations when computing them,
> rather than to have guix do feature detection against the guix-daemon
> that is being used at the point the derivations are being computed.

Would it work for you if we added a keyword argument to
=E2=80=98open-connection=E2=80=99 in (guix store) that would let you select=
 which
builtins to use?

As in:

  (open-connection
    #:assume-available-builtin-builders '("download"))

Ludo=E2=80=99.




Information forwarded to bug-guix@HIDDEN:
bug#67250; Package guix. Full text available.

Message received at 67250 <at> debbugs.gnu.org:


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From: Christopher Baines <mail@HIDDEN>
To: Simon Tournier <zimon.toutoune@HIDDEN>
Subject: Re: bug#67250: builtin:git-download capability detection not
 working for the bordeaux build farm
Date: Mon, 20 Nov 2023 10:29:19 +0000
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Simon Tournier <zimon.toutoune@HIDDEN> writes:

> Hi Chris,
>
> On Fri, 17 Nov 2023 at 21:39, Christopher Baines <mail@HIDDEN> wrote:
>
>> The bordeaux build farm depends on computing the derivations on one
>> machine, then potentially building them on a different machine.
>>
>> Some of the build machines don't have a new enough guix-daemon that
>> understands builtin:git-download, so derivations that use this are
>> sometimes failing (e.g. [1])
>
> Do you mean that the drv file is generated using a new daemon then this
> drv file is =E2=80=9Coffloaded=E2=80=9D to another machine using an older=
 daemon and
> thus fails to build it?

Roughly, yep.

>> One potential approach to address this is somehow have the data service
>> indicate that it wants compatible derivations when computing them,
>> rather than to have guix do feature detection against the guix-daemon
>> that is being used at the point the derivations are being computed.
>
> Other solutions are: downgrade the daemon of one of the machine or
> update the daemon of other machines, no?
>
> Why would the latter not be possible?

It's possible, just difficult. Because with the current guix-daemon, the
build coordinator can only build things that can be GC'd, some machines
deliberately run older daemons to allow building newer things without
hitting this issue.

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Information forwarded to bug-guix@HIDDEN:
bug#67250; Package guix. Full text available.

Message received at 67250 <at> debbugs.gnu.org:


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From: Simon Tournier <zimon.toutoune@HIDDEN>
To: Christopher Baines <mail@HIDDEN>, 67250 <at> debbugs.gnu.org
Subject: Re: bug#67250: builtin:git-download capability detection not
 working for the bordeaux build farm
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Hi Chris,

On Fri, 17 Nov 2023 at 21:39, Christopher Baines <mail@HIDDEN> wrote:

> The bordeaux build farm depends on computing the derivations on one
> machine, then potentially building them on a different machine.
>
> Some of the build machines don't have a new enough guix-daemon that
> understands builtin:git-download, so derivations that use this are
> sometimes failing (e.g. [1])

Do you mean that the drv file is generated using a new daemon then this
drv file is =E2=80=9Coffloaded=E2=80=9D to another machine using an older d=
aemon and
thus fails to build it?


> One potential approach to address this is somehow have the data service
> indicate that it wants compatible derivations when computing them,
> rather than to have guix do feature detection against the guix-daemon
> that is being used at the point the derivations are being computed.

Other solutions are: downgrade the daemon of one of the machine or
update the daemon of other machines, no?

Why would the latter not be possible?

Cheers
simon




Information forwarded to bug-guix@HIDDEN:
bug#67250; Package guix. Full text available.

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From: Christopher Baines <mail@HIDDEN>
To: bug-guix@HIDDEN
Subject: builtin:git-download capability detection not working for the
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Date: Fri, 17 Nov 2023 21:39:48 +0000
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The bordeaux build farm depends on computing the derivations on one
machine, then potentially building them on a different machine.

Some of the build machines don't have a new enough guix-daemon that
understands builtin:git-download, so derivations that use this are
sometimes failing (e.g. [1])

1: https://bordeaux.guix.gnu.org/build/10cc5622-6b1f-4f28-ad9a-41cf796d7a15

One potential approach to address this is somehow have the data service
indicate that it wants compatible derivations when computing them,
rather than to have guix do feature detection against the guix-daemon
that is being used at the point the derivations are being computed.

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Acknowledgement sent to Christopher Baines <mail@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-guix@HIDDEN. Full text available.
Report forwarded to bug-guix@HIDDEN:
bug#67250; Package guix. Full text available.
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