From: "Ludovic Courtès" <ludo@gnu.org>
To: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Cc: Josselin Poiret <dev@jpoiret.xyz>,
Simon Tournier <zimon.toutoune@gmail.com>,
Mathieu Othacehe <othacehe@gnu.org>,
Tobias Geerinckx-Rice <me@tobias.gr>,
Ricardo Wurmus <rekado@elephly.net>,
65866@debbugs.gnu.org, Christopher Baines <guix@cbaines.net>
Subject: [bug#65866] [PATCH 0/8] Add built-in builder for Git checkouts
Date: Fri, 22 Sep 2023 23:58:27 +0200 [thread overview]
Message-ID: <87fs35an0c.fsf_-_@gnu.org> (raw)
In-Reply-To: <87ttro4tv2.fsf_-_@gmail.com> (Maxim Cournoyer's message of "Wed, 20 Sep 2023 13:50:09 -0400")
Maxim Cournoyer <maxim.cournoyer@gmail.com> skribis:
> Ludovic Courtès <ludo@gnu.org> writes:
>
>> Fixes <https://issues.guix.gnu.org/63331>.
>>
>> Longer-term this will remove Git from the derivation graph when its sole
>> use is to perform a checkout for a fixed-output derivation, thereby
>> breaking dependency cycles that can arise in these situations.
>>
>> * guix/git-download.scm (git-fetch): Rename to…
>> (git-fetch/in-band): … this. Deal with GIT or GUILE being #f.
>
> Nitpick, but I find this usage of dynamic default argument on top of
> default arguments inelegant; see my comments below for an
> alternative.
Ah, let me explain…
>> +(define* (git-fetch/in-band ref hash-algo hash
>> + #:optional name
>> + #:key (system (%current-system))
>> + (guile (default-guile))
>> + (git (git-package)))
>> + "Return a fixed-output derivation that performs a Git checkout of REF, using
>> +GIT and GUILE (thus, said derivation depends on GIT and GUILE).
>> +
>> +This method is deprecated in favor of the \"builtin:git-download\" builder.
>> +It will be removed when versions of guix-daemon implementing
>> +\"builtin:git-download\" will be sufficiently widespread."
>> (define inputs
>> - `(("git" ,git)
>> + `(("git" ,(or git (git-package)))
>
> Instead of using 'or' here to ensure git has a value, the default values
> should have been copied to the new definition of git-fetch.
[...]
>> +(define* (git-fetch ref hash-algo hash
>> + #:optional name
>> + #:key (system (%current-system))
>> + guile git)
>
> As mentioned above, I'd have kept the default values for guile and git
> here.
The reason ‘guile’ and ‘git’ default to #f here is because we don’t need
them in what we expect to be the common case eventually:
>> + "Return a fixed-output derivation that fetches REF, a <git-reference>
>> +object. The output is expected to have recursive hash HASH of type
>> +HASH-ALGO (a symbol). Use NAME as the file name, or a generic name if #f."
>> + (mlet %store-monad ((builtins (built-in-builders*)))
>> + (if (member "git-download" builtins)
>> + (git-fetch/built-in ref hash-algo hash name
>> + #:system system)
So it’s an optimization to avoid module lookups when they’re
unnecessary.
I hope that makes sense!
Ludo’.
next prev parent reply other threads:[~2023-09-22 21:59 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-11 14:23 [bug#65866] [PATCH 0/8] Add built-in builder for Git checkouts Ludovic Courtès
2023-09-11 14:25 ` [bug#65866] [PATCH 1/8] git-download: Move fallback code to (guix build git) Ludovic Courtès
2023-09-20 16:05 ` [bug#65866] [PATCH 0/8] Add built-in builder for Git checkouts Maxim Cournoyer
2023-09-20 16:40 ` Simon Tournier
2023-09-22 21:53 ` Ludovic Courtès
2023-09-11 14:25 ` [bug#65866] [PATCH 2/8] git-download: Honor the ‘GUIX_DOWNLOAD_FALLBACK_TEST’ environment variable Ludovic Courtès
2023-09-20 16:07 ` [bug#65866] [PATCH 0/8] Add built-in builder for Git checkouts Maxim Cournoyer
2023-09-11 14:25 ` [bug#65866] [PATCH 3/8] perform-download: Remove unused one-argument clause Ludovic Courtès
2023-09-20 16:09 ` [bug#65866] [PATCH 0/8] Add built-in builder for Git checkouts Maxim Cournoyer
2023-09-11 14:25 ` [bug#65866] [PATCH 4/8] daemon: Add “git-download” built-in builder Ludovic Courtès
2023-09-20 17:32 ` [bug#65866] [PATCH 0/8] Add built-in builder for Git checkouts Maxim Cournoyer
2023-09-21 7:42 ` Ludovic Courtès
2023-09-22 22:27 ` [bug#65866] [PATCH v2 " Ludovic Courtès
2023-09-22 22:27 ` [bug#65866] [PATCH v2 1/8] git-download: Move fallback code to (guix build git) Ludovic Courtès
2023-09-25 8:15 ` Simon Tournier
2023-09-25 9:24 ` [bug#65866] [PATCH 0/8] Add built-in builder for Git checkouts Ludovic Courtès
2023-09-25 12:13 ` Simon Tournier
2023-09-22 22:27 ` [bug#65866] [PATCH v2 2/8] git-download: Honor the ‘GUIX_DOWNLOAD_FALLBACK_TEST’ environment variable Ludovic Courtès
2023-09-22 22:27 ` [bug#65866] [PATCH v2 3/8] perform-download: Remove unused one-argument clause Ludovic Courtès
2023-09-22 22:28 ` [bug#65866] [PATCH v2 4/8] daemon: Add “git-download” built-in builder Ludovic Courtès
2023-09-22 22:28 ` [bug#65866] [PATCH v2 5/8] build: Add dependency on Git Ludovic Courtès
2023-09-25 13:59 ` Simon Tournier
2023-09-26 14:05 ` [bug#65866] Bootstrapping without the daemon and all that Ludovic Courtès
2023-09-26 17:04 ` Simon Tournier
2023-10-12 10:54 ` Ludovic Courtès
2023-10-16 8:46 ` Simon Tournier
2023-09-22 22:28 ` [bug#65866] [PATCH v2 6/8] perform-download: Use the ‘git’ command captured at configure time Ludovic Courtès
2023-09-22 22:28 ` [bug#65866] [PATCH v2 7/8] git-download: Use “builtin:git-download” when available Ludovic Courtès
2023-09-25 8:33 ` Simon Tournier
2023-09-25 9:23 ` [bug#65866] [PATCH 0/8] Add built-in builder for Git checkouts Ludovic Courtès
2023-09-25 12:37 ` Simon Tournier
2023-09-25 12:48 ` Simon Tournier
2023-09-25 15:49 ` Maxim Cournoyer
2023-09-26 15:44 ` bug#65866: " Ludovic Courtès
2023-09-26 17:13 ` [bug#65866] " Simon Tournier
2023-10-01 15:02 ` Ludovic Courtès
2023-10-16 9:11 ` [bug#65866] Toward RFC? (was Re: [bug#65866] [PATCH 0/8] Add built-in builder for Git checkouts) Simon Tournier
2023-10-30 15:12 ` Ludovic Courtès
2023-09-22 22:28 ` [bug#65866] [PATCH v2 8/8] tests: Assume ‘git’ is always available Ludovic Courtès
2023-09-11 14:25 ` [bug#65866] [PATCH 5/8] build: Add dependency on Git Ludovic Courtès
2023-09-20 17:57 ` [bug#65866] [PATCH 0/8] Add built-in builder for Git checkouts Maxim Cournoyer
2023-09-22 22:00 ` Ludovic Courtès
2023-09-25 15:59 ` Maxim Cournoyer
2023-09-11 14:25 ` [bug#65866] [PATCH 6/8] perform-git-download: Use the ‘git’ command captured at configure time Ludovic Courtès
2023-09-20 17:34 ` [bug#65866] [PATCH 0/8] Add built-in builder for Git checkouts Maxim Cournoyer
2023-09-11 14:25 ` [bug#65866] [PATCH 7/8] git-download: Use “builtin:git-download” when available Ludovic Courtès
2023-09-20 17:50 ` [bug#65866] [PATCH 0/8] Add built-in builder for Git checkouts Maxim Cournoyer
2023-09-22 21:58 ` Ludovic Courtès [this message]
2023-09-25 15:56 ` Maxim Cournoyer
2023-09-11 14:25 ` [bug#65866] [PATCH 8/8] tests: Assume ‘git’ is always available Ludovic Courtès
2023-09-20 17:59 ` [bug#65866] [PATCH 0/8] Add built-in builder for Git checkouts Maxim Cournoyer
[not found] <877ctljs0m.fsf@inria.fr>
[not found] ` <87pm2osrot.fsf@gnu.org>
2023-09-11 15:16 ` [bug#65866] bug#63331: Guile-GnuTLS/Git circular dependency and built-in git checkouts Vivien Kraus via Guix-patches via
2023-09-11 20:57 ` [bug#65866] [PATCH 0/8] Add built-in builder for Git checkouts Ludovic Courtès
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