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: Tue, 03 Oct 2017 14:30:26 +0200
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To: Jan Nieuwenhuizen <janneke@gnu.org>
Cc: 28659@debbugs.gnu.org

Jan Nieuwenhuizen <janneke@gnu.org> skribis:

> Ludovic Court=C3=A8s writes:

[...]

>> Perhaps we should make content-addressed mirrors configurable in a way
>> that=E2=80=99s orthogonal to derivations, something similar in spirit to
>> --substitute-urls?  The difficulty is that content-addressed mirrors are
>> not just URLs; see (guix download).
>
> Hmm.  I'm not sure what problem we are solving.  Should we only do this
> for github(-like) tarballs?  Do we see this problem with other sources,
> should we prevent it?  Possibly github will never do something like this
> again.  Or we could banish github/gitlab(?) auto-generated tarballs and
> go for git checkouts+commits?

Content-addressed mirrors help with disappearing and modified tarballs
in general; it=E2=80=99s not just GitHub.

Occasionally we see that problem with tarballs coming from elsewhere:
404 is quite frequent, and in-place modification happens from time to
time (even on ftp.gnu.org=E2=80=A6).

Ludo=E2=80=99.