From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Subject: bug#38232: Cuirass: Some builds fail although their log file ends
 with 'build-succeeded'
Date: Mon, 18 Nov 2019 21:22:20 +0100
Message-ID: <87blt9gcjn.fsf@gnu.org>
References: <87y2wfptj5.fsf@lassieur.org> <87y2wei4cn.fsf@gnu.org>
 <877e3xjevh.fsf@lassieur.org>
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 Lassieur"'s message of "Mon, 18 Nov 2019 18:03:46 +0100")
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To: =?UTF-8?Q?Cl=C3=A9ment?= Lassieur <clement@lassieur.org>
Cc: 38232@debbugs.gnu.org

Hello,

Cl=C3=A9ment Lassieur <clement@lassieur.org> skribis:

>> Perhaps the build failed (transient failure or something) but was
>> eventually restarted either as a dependency of some other build or
>> manually on berlin.  In that case Cuirass may be unaware that the build
>> eventually succeeded, hence the discrepancy.
>
> Thank you for the explanation.  Would it make sense to copy the log file
> to some other place when the build is done?  The web interface would
> fetch it there, and we would be sure it matches the associated Cuirass
> build.

Build logs are kept by guix-daemon under /var/log/guix/drvs.  They are
indexed by derivation, meaning that there can be only one log per
derivation.

This is a limitation in cases where builds are retried.  Initially
Mathieu Lirzin thought about keeping logs elsewhere so we could
distinguish between several attempts to build a derivation.  However,
that=E2=80=99s kind of redundant with what the daemon does, and not frequen=
tly
useful.

Now, it is indeed useful in some cases, so we could do something like
you describe.

Thanks,
Ludo=E2=80=99.