[Reproducible-builds] Heads-up! (was: [dpkg] 07/07: Document

Holger Levsen holger at layer-acht.org
Mon Mar 7 14:10:59 UTC 2016

Hi Lunar,

thanks for rebasing our changes on the latest master branch!

On Freitag, 4. März 2016, Jérémy Bobbio wrote:
> This versions implement changes discussed in #138409. One is that we are
> now capturing some environment variables in .buildinfo files. In the
> case of tests.reproducible-builds.org and the prebuilder script that means
> that, as it is, every package would fail to be reproducible with the
> current comparison.

which environment variables are put into the .buildinfo files so that the 
comparison will fail?

or maybe rather: why cant we make the .changes file include reproducible 
.buildinfo files?

> So I refrained from uploading binaries yet.
> Couple of ways out I can think of:
>  1. Easy quick fix: use sed to remove .buildinfo from both .changes
>     file, then give .changes file to diffoscope.
>  2. Slightly more complicated: change diffoscope to ignore most
>     fields in .buildinfo files.
>  3. More involved: finally add “ignore modules” to diffoscope and
>     write a module to ignore most fields in .buildinfo files. I
>     would enable such a module by default.

4. teach diffoscope to ignore .buildinfo files when processing .changes files?

> (I won't have time to work on any of this before probably 8-10 days.)
> Just for the record, Guillem said on IRC that he was waiting for us to
> test the treewalk code before uploading dpkg/1.18.5 which ought to fix
> file ordering issues.

/me nods.

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