bug#39575: guix time-machine fails when a tarball was modified in-place

["Ludovic Courtès" <ludo@gnu.org>]

Jan Nieuwenhuizen <janneke@gnu.org> skribis:

> Ludovic Courtès writes:

[...]

>> The problem here is really that we fall back to content-addressed
>> mirrors instead of using them directly:
>>
>>   https://issues.guix.gnu.org/issue/28659
>
> Wait, what happened here; you finally proposed a patch two years ago and
> nothing happened/we all forgot to follow up?

I think we forgot, indeed.

One thing I don’t quite like about the patch is the fact that ‘guix
substitutes’ connects to the daemon in ‘content-addressed-item?’.

Also, one could argue that we’d steer users towards downloading from our
server, which could be a privacy concern (probably not a strong argument
since one can easily change the substitute URLs.)

Thoughts?

Ludo’.