GNU bug report logs - #43843
git-annex is not Reproducible

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From: Kyle Meyer <kyle <at> kyleam.com>
To: zimoun <zimon.toutoune <at> gmail.com>
Cc: 43843 <at> debbugs.gnu.org
Subject: bug#43843: git-annex is not Reproducible
Date: Wed, 07 Oct 2020 23:04:13 -0400

On 10/07/20 12:35:51 +0200, zimoun wrote:
> Dear,
>
> Using Guix 04a459a, the package ’git-annex’ is not reproducible:
>
>   guix build git-annex
>   guix build git-annex --no-grafts --check -K
>
> return:
>
> --8<---------------cut here---------------start------------->8---
> guix build: error: derivation `/gnu/store/70qkv5hi5yq20m1h9jfm17m5lsc235mk-git-annex-8.20200908.drv' may not be deterministic: output `/gnu/store/cbrwrlwx6kg7l5q6ifl7q08icm17704g-git-annex-8.20200908' differs from ‘/gnu/store/cbrwrlwx6kg7l5q6ifl7q08icm17704g-git-annex-8.20200908-check’
> --8<---------------cut here---------------end--------------->8---
>
> then:
>
> --8<---------------cut here---------------start------------->8---
> $ diff -r --no-dereference /gnu/store/cbrwrlwx6kg7l5q6ifl7q08icm17704g-git-annex-8.20200908{,-check}
> Binary files /gnu/store/cbrwrlwx6kg7l5q6ifl7q08icm17704g-git-annex-8.20200908/bin/git-annex and /gnu/store/cbrwrlwx6kg7l5q6ifl7q08icm17704g-git-annex-8.20200908-check/bin/git-annex differ
> --8<---------------cut here---------------end--------------->8---
>
> Is it expected?  I have not tried ’diffoscope’ yet to investigate.

Thanks for noticing.  I see the same on my end (and also with the
git-annex update [1] that I submitted before I saw this message).

I suspect this is a relatively new issue, as I've run `build --check'
successfully on git-annex in the past.  The git-annex definition prior
to the one above was introduced with e13fefbcff (gnu: git-annex: Create
fake static output, 2020-08-17).  On that commit, the check also failed
for me:

    $ guix time-machine --commit=e13fefbcffa50144d9301d67b61928ac3c964fb3 -- build --no-grafts --check git-annex
    guix build: error: derivation `/gnu/store/5illriaaijqrhl17aymzgiw6wzaq666s-git-annex-8.20200810.drv' may not be deterministic: output `/gnu/store/32h0xbqdwkm22naqba10fk9124cdgw9q-git-annex-8.20200810' differs

However, going back one more to 35e24fab73 (gnu: git-annex: Update to
8.20200810, 2020-08-11), the check was successful:

    $ guix time-machine --commit=35e24fab73bc450c6e0d3b9a5bbdfa88d2c425f4 -- build --no-grafts --check git-annex
    [...]
    /gnu/store/m79ri0g2s3d8pk52ysjkdvallk2zqbwb-git-annex-8.20200810


[1]: bug#43854: <20201007204946.22878-1-kyle <at> kyleam.com>

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