GNU bug report logs - #65866
[PATCH 0/8] Add built-in builder for Git checkouts

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From: Ludovic Courtès <ludo <at> gnu.org>
To: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
Cc: guix-devel <at> gnu.org, 65866 <at> debbugs.gnu.org, Simon Tournier <zimon.toutoune <at> gmail.com>
Subject: [bug#65866] hard dependency on Git? (was bug#65866: [PATCH 0/8] Add built-in builder for Git checkouts)
Date: Mon, 18 Sep 2023 15:56:21 +0200

Hello!

Maxim Cournoyer <maxim.cournoyer <at> gmail.com> skribis:

> Yeah, 'git gc' is lacking from libgit2.  I'm not against adding
> dependency on the real 'git' CLI, but at that point, as Simon mentioned,
> I see little reason to keep libgit2 around for much longer, given it
> performs worst than git CLI in every aspect.  I doubt forking processes
> on GNU/Linux would cause a performance hit compared to using libgit2,
> especially given how optimized git appears to be (at least compared to
> libgit2).

As I wrote, as an example, I don’t think that there could be a practical
implementation of (guix git-authenticate) shelling out to ‘git’.

Anyhow, how about this plan:

  1. Merge <https://issues.guix.gnu.org/65866> with the hard Git
     dependency.

  2. When libgit2 1.7 with shallow clones is available in Guix, work on
     a patch to use Guile-Git for clones and evaluate it.

  3. Brainstorm on ways to address lack of GC support based on a closer
     analysis of disk usage for Guix’s cached checkouts.

Deal?

Ludo’.

PS: I don’t buy the “libgit2 will disappear from Guix” argument because
    it’s not a natural phenomenon that we’re observing but a willful
    construction.

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