bug#56441: closed (Time travel doesn't resist profile format changes)

[GNU bug Tracking System]

Your message dated Sat, 09 Jul 2022 00:01:14 +0200
with message-id <87zghjqn6d.fsf@gnu.org>
and subject line Re: bug#56441: guix time-machine broken by profiles speed-up
has caused the debbugs.gnu.org bug report #56441,
regarding Time travel doesn't resist profile format changes
to be marked as done.

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-- 
56441: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=56441
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> --- Begin Message ---
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>
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> Subject: 
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> guix time-machine broken by profiles speed-up
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> Date: 
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> Thu, 07 Jul 2022 18:42:28 +0200
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>
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>
> Hi,
>
> Bug#55499 [1] is fixed by 4ff12d1de7cd617b791996ee7ca1240660b4c20e.
> However, because the manifest version is going from 3 to 4 with new
> fields, the new Guix cannot builds the old Guix.
>
> Commit 4ff12d1de7cd617b791996ee7ca1240660b4c20e is not able to go to its
> parent 9b8c442b254b82196fe2492142b3c3bbbd891a1b.
>
> --8<---------------cut here---------------start------------->8---
> $ git rev-parse 4ff12d1de7^
> 9b8c442b254b82196fe2492142b3c3bbbd891a1b
>
> $ guix time-machine --commit=4ff12d1de7 -- time-machine --commit=9b8c442b25 -- 
> help
> Updating channel 'guix' from Git repository at 
> 'https://git.savannah.gnu.org/git/guix.git'...
> Computing Guix derivation for 'x86_64-linux'... \
> The following derivation will be built:
>   /gnu/store/r5qk23fibxn5ryd2k7b8qkbryqv4m3ds-profile.drv
>
> building package cache...
> |builder for 
> `/gnu/store/19nk2x26s0dp68r7d36ifbg0ck0q3xps-guix-package-cache.drv' failed to 
> produce output path 
> `/gnu/store/axqgrls563slnp76x60dqlv7sdwcm2ly-guix-package-cache'
> build of /gnu/store/19nk2x26s0dp68r7d36ifbg0ck0q3xps-guix-package-cache.drv 
> failed
> View build log at 
> '/var/log/guix/drvs/19/nk2x26s0dp68r7d36ifbg0ck0q3xps-guix-package-cache.drv.gz'.
> cannot build derivation 
> `/gnu/store/r5qk23fibxn5ryd2k7b8qkbryqv4m3ds-profile.drv': 1 dependencies 
> couldn't be built
> guix time-machine: error: build of 
> `/gnu/store/r5qk23fibxn5ryd2k7b8qkbryqv4m3ds-profile.drv' failed
> --8<---------------cut here---------------end--------------->8---
>
>
> 1: <https://issues.guix.gnu.org/55499>
>
>
>
> Cheers,
> simon
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#56441: guix time-machine broken by profiles speed-up
>
>
>
>
> Date: 
>
> Sat, 09 Jul 2022 00:01:14 +0200
>
>
>
>
> User-agent: 
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> Gnus/5.13 (Gnus v5.13) Emacs/28.1 (gnu/linux)
>
>
>
>
> Ludovic Courtès <ludo@gnu.org> skribis:
>
> > The patches below do that.  As discussed on IRC, it’s not pretty but
> > it’s pragmatic.
>
> Pushed!
>
>   e80f0cda96 etc: Add 'time-travel-manifest.scm'.
>   c9fbd40785 channels: Emit version 3 profiles.
>   89e2288751 profiles: Support the creation of profiles with version 3 
> manifests.
>
> The last commit was inspired by zimoun’s test.  I plan to add a
> ‘time-travel’ jobset on ci.guix.
>
> Thank you zimoun & Ricardo!
>
> Ludo’.
>
>
> --- End Message ---