GNU bug report logs - #65720
Guile-Git-managed checkouts grow way too much

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Message #82 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Simon Tournier <zimon.toutoune <at> gmail.com>
To: Ludovic Courtès <ludo <at> gnu.org>, guix-patches <at> gnu.org
Cc: Josselin Poiret <dev <at> jpoiret.xyz>, 65720 <at> debbugs.gnu.org,
 Mathieu Othacehe <othacehe <at> gnu.org>,
 Ludovic Courtès <ludo <at> gnu.org>,
 Tobias Geerinckx-Rice <me <at> tobias.gr>, Ricardo Wurmus <rekado <at> elephly.net>,
 Christopher Baines <guix <at> cbaines.net>
Subject: Re: bug#65720: [PATCH] git: Shell out to ‘git gc’ when necessary.
Date: Mon, 23 Oct 2023 12:08:07 +0200

Hi Ludo,

On Fri, 20 Oct 2023 at 18:15, Ludovic Courtès <ludo <at> gnu.org> wrote:

> * guix/git.scm (packs-in-git-repository, maybe-run-git-gc): New
> procedures.
> (update-cached-checkout): Use it.
> ---
>  guix/git.scm | 39 ++++++++++++++++++++++++++++++++++++---
>  1 file changed, 36 insertions(+), 3 deletions(-)

LGTM.  Just two colors for the bikeshed. :-)


> +  (when (> (packs-in-git-repository directory) 25)

Why 25?  And not 10 or 50 or 100?


>  (define* (update-cached-checkout url
>                                   #:key
>                                   (ref '())
> @@ -515,6 +545,9 @@ (define* (update-cached-checkout url
>                     seconds seconds
>                     nanoseconds nanoseconds))))
>  
> +       ;; Run 'git gc' if needed.
> +       (maybe-run-git-gc cache-directory)

Why not trigger it by “guix gc”?

Well, I expect “guix gc” to take some time and I choose when.  However,
I want “guix pull” or “guix time-machine” to be as fast as possible and
here some extra time is added, and I cannot control exactly when.

Cheers,
simon

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