From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp1 ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms11 with LMTPS id YN2ALeiRsl8REwAA0tVLHw (envelope-from ) for ; Mon, 16 Nov 2020 14:51:20 +0000 Received: from aspmx1.migadu.com ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp1 with LMTPS id eLNLKeiRsl8lFAAAbx9fmQ (envelope-from ) for ; Mon, 16 Nov 2020 14:51:20 +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 532729404C4 for ; Mon, 16 Nov 2020 14:51:20 +0000 (UTC) Received: from localhost ([::1]:56678 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kefqg-0001mN-VT for larch@yhetil.org; Mon, 16 Nov 2020 09:51:18 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:34940) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kefqW-0001m7-K8 for guix-devel@gnu.org; Mon, 16 Nov 2020 09:51:08 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]:34639) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kefqU-0005m5-JB; Mon, 16 Nov 2020 09:51:06 -0500 Received: from [2a01:e0a:1d:7270:af76:b9b:ca24:c465] (port=48016 helo=ribbon) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1kefqU-00046d-3l; Mon, 16 Nov 2020 09:51:06 -0500 From: =?utf-8?Q?Ludovic_Court=C3=A8s?= To: Danny Milosavljevic Subject: Re: A plan for parameterized packages References: <87eeku8trb.fsf@gnu.org> <20201115214658.41223d15@scratchpost.org> X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 26 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: Mon, 16 Nov 2020 15:51:04 +0100 In-Reply-To: <20201115214658.41223d15@scratchpost.org> (Danny Milosavljevic's message of "Sun, 15 Nov 2020 21:46:58 +0100") Message-ID: <87blfxwe1z.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@gnu.org 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: gNq+FQ2MaUBT Hi, Danny Milosavljevic skribis: > For the embedded/flash rom side: Note: it=E2=80=99s great if it can help reduce closure size, but that=E2=80= =99s not the goal. > * Enable/disable building the documentation. I really don't need a 40 MiB > manual stored onto a 16 MiB firmware flash chip. If that's better done a= s an > extra output, fair enough. Extra output is better, yup. :-) > * Enable/disable obscure dependencies: Library packages that pull in 400 = MiB Qt > into the closure for a thing no one (TM) uses should probably provide a s= witch to > disable that GUI. Sometimes a package provides multiple GUIs for differe= nt > toolkits, in which case one should be able to choose one toolkit and not > build for the others. Yes, that sounds like a good use case. > * No, even in 2020, I won't start using AmigaFS, NFSv3 and whatever old > protocol/format is still around and superseded by other protocols. > > The gexp-functionality of being able to select individual files of a pack= age > is already very useful for use cases an embedded developer would have > (and that's there for a long time already). So that's nice! > > For the kind of feature flags I have in mind, it usually means I don't wa= nt > to have the feature *anywhere*--for example, if I don't want to have Qt or > Kerberos or whatever, that's because I want to save the space and thus > it should be able to be *globally* specified--at least per profile. OK, so that=E2=80=99s similar to what Pierre was suggesting: =E2=80=9Cgloba= l=E2=80=9D parameters, or at least parameters that apply to all the packages that know about it, not just to one package. Sounds doable, but again, the challenge will be to build all the combinations. > I would advise against doing a grep -r -- --enable and introducing all th= ose > as parameters. Rather I would check the closure of stuff and if the clos= ure > goes from 1200 MiB to 50 MiB, chances are a parameter would be nice there= :) Heh, sounds like a valid criterion. I guess initially we=E2=80=99ll have to use them sparsely (in Guix proper) = so we can gain experience with them. > From experience with Gentoo before I can tell you that the combinatory > explosion is a real problem and most of the "more advanced" (toggled more > switches :) ) combinations did not work the majority of the time. Right, and that=E2=80=99s precisely what I=E2=80=99d like to avoid, at leas= t for the packages in Guix proper (authors of external channels might have a different policy.) So I suppose in Guix we=E2=80=99d have a policy of using them sparsely, and only/primarily in leaf packages. Thanks, Ludo=E2=80=99.