Subject: Re: bug#57306: guix pull to old commit fails due to unsupported manifest format

From: zimoun <[email-masked]>
Date: Mon, 29 Aug 2022 23:36:49 +0200

Hi,

On mar., 30 août 2022 at 01:07, Arun Isaac <[email-masked]> wrote:

> Thanks, Josselin! I have asked at #56441 whether it may be reopened.

>From my understanding, it is another side effect of
4ff12d1de7cd617b791996ee7ca1240660b4c20e.  Commit
9b8c442b254b82196fe2492142b3c3bbbd891a1b is the parent of 4ff12d.

Using a recent commit,

--8<---------------cut here---------------start------------->8---
$ guix describe
Generation 6	août 19 2022 12:36:01	(current)
  guix 65cabb0
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 65cabb010e3388d10f9b25ec560bfcfab5f810d4
--8<---------------cut here---------------end--------------->8---

‘generate-package-cache’ passes…

--8<---------------cut here---------------start------------->8---
$ guix pull --commit=9b8c442b254b82196fe2492142b3c3bbbd891a1b -p /tmp/old-ko-describe

[...]

$ /tmp/old-ko-describe/bin/guix describe
guix describe: error: unsupported manifest format
--8<---------------cut here---------------end--------------->8---

…but not “guix describe”.  Indeed, version 4:

--8<---------------cut here---------------start------------->8---
$ cat /tmp/old-ko-describe/manifest | grep -A 1 '(manifest'
(manifest
  (version 4)
--8<---------------cut here---------------end--------------->8---

Note that,

--8<---------------cut here---------------start------------->8---
$ guix pull --commit=4ff12d1de7cd617b791996ee7ca1240660b4c20e -p /tmp/old-ok

$ /tmp/old-ok/bin/guix describe
Generation 1	août 29 2022 22:49:56	(current)
  guix 4ff12d1
    repository URL: https://git.savannah.gnu.org/git/guix.git
    commit: 4ff12d1de7cd617b791996ee7ca1240660b4c20e

$ /tmp/old-ok/bin/guix pull --commit=9b8c442b254b82196fe2492142b3c3bbbd891a1b -p /tmp/old-ko
Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.org/git/guix.git'...
Building from this channel:
  guix      https://git.savannah.gnu.org/git/guix.git	9b8c442
Computing Guix derivation for 'x86_64-linux'... -
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://bordeaux.guix.gnu.org'... 100.0%
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 pull: error: build of `/gnu/store/r5qk23fibxn5ryd2k7b8qkbryqv4m3ds-profile.drv' failed
--8<---------------cut here---------------end--------------->8---

Well, it appears to me easier if bug#57306 remains closed since ’guix
time-machine’ is fixed; as it was the subject.

Cheers,
simon

<http://issues.guix.gnu.org/issue/57306>