From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp2 ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms11 with LMTPS id cPrFBr/enV8SZwAA0tVLHw (envelope-from ) for ; Sat, 31 Oct 2020 22:01:35 +0000 Received: from aspmx1.migadu.com ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp2 with LMTPS id cJOGAr/enV80MQAAB5/wlQ (envelope-from ) for ; Sat, 31 Oct 2020 22:01:35 +0000 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx1.migadu.com (Postfix) with ESMTPS id D705F94043A for ; Sat, 31 Oct 2020 22:01:34 +0000 (UTC) Received: from localhost ([::1]:47104 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kYywH-0005BP-RQ for larch@yhetil.org; Sat, 31 Oct 2020 18:01:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46004) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kYyvt-0005BD-ST for guix-devel@gnu.org; Sat, 31 Oct 2020 18:01:13 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:44543) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kYyvt-0002fB-4X; Sat, 31 Oct 2020 18:01:09 -0400 Received: from [2a01:e0a:1d:7270:af76:b9b:ca24:c465] (port=46278 helo=ribbon) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1kYyvs-0003ir-ET; Sat, 31 Oct 2020 18:01:08 -0400 From: =?utf-8?Q?Ludovic_Court=C3=A8s?= To: Brendan Tildesley Subject: Re: A better way to access records. References: <487cea17-061a-2cc9-6b3e-7b688114d158@brendan.scot> X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 10 Brumaire an 229 de la =?utf-8?Q?R=C3=A9volution?= X-PGP-Key-ID: 0x090B11993D9AEBB5 X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 3CE4 6455 8A84 FDC6 9DB4 0CFB 090B 1199 3D9A EBB5 X-OS: x86_64-pc-linux-gnu Date: Sat, 31 Oct 2020 23:01:07 +0100 In-Reply-To: <487cea17-061a-2cc9-6b3e-7b688114d158@brendan.scot> (Brendan Tildesley's message of "Fri, 30 Oct 2020 21:28:38 +1100") Message-ID: <87sg9urr6k.fsf@gnu.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-BeenThere: guix-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: guix-devel Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: "Guix-devel" X-Scanner: ns3122888.ip-94-23-21.eu Authentication-Results: aspmx1.migadu.com; dkim=none; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of guix-devel-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-devel-bounces@gnu.org X-Spam-Score: -1.51 X-TUID: 94YdbqMJ/gCU Hi, Brendan Tildesley skribis: > In the guix codebase, on many occasions there appear things like this: > > (match-lambda > =C2=A0=C2=A0=C2=A0 (($ agetty tty term baud-rate a= uto-login > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 login-program login-pause? eig= ht-bits? no-reset? remote? > flow-control? > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 host no-issue? init-string no-= clear? local-line extract-baud? > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 skip-login? no-newline? login-= options chroot hangup? > keep-baud? timeout > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 detect-case? wait-cr? no-hints= ? no-hostname? long-hostname? > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 erase-characters kill-characte= rs chdir delay nice extra-options) > =C2=A0=C2=A0=C2=A0=C2=A0 (list > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 .... This has officially been Bad Practice for a while. Instead, the recommended approach is to use =E2=80=98match-record=E2=80=99 from (guix re= cords). There are examples of that primarily in (gnu services =E2=80=A6). Does that help? Thanks, Ludo=E2=80=99.