From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
Subject: bug#28659: v0.13: guix pull fails;
	libgit2-0.26.0 and 0.25.1 content hashes fail
Date: Mon, 02 Oct 2017 16:57:38 +0200
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	<20171001204237.GA11804@jasmine.lan>
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In-Reply-To: <20171001204237.GA11804@jasmine.lan> (Leo Famulari's message of
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To: Leo Famulari <leo@famulari.name>
Cc: 28659@debbugs.gnu.org

Hi!

Leo Famulari <leo@famulari.name> skribis:

> I contacted GitHub about this issue a few weeks ago and they said that:
>
> 1) They do not guarantee bit-reproducibility of the snapshots they
> generate automatically for each release tag, and they wish that people
> would not rely on them as we do. However, since people *are* relying on
> them, they are discussing this issue internally.

Oh?!  Then we=E2=80=99re in trouble.

Perhaps we should start using =E2=80=98git-fetch=E2=80=99 more, with Softwa=
re=C2=A0Heritage
as a fallback content-addressed mirror?  Though again the difficulty is
that SWH uses Git=E2=80=99s method to hash directory contents, so we=E2=80=
=99d end up
having to provide both a Nix hash and a Git hash in =E2=80=98origin=E2=80=
=99.  :-/

> In the meantime, we can add this to the list of reasons that
> reproducibility is difficult in the long term.

Heh.

Ludo=E2=80=99.