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 GLMTF0i12F8fcQAA0tVLHw (envelope-from ) for ; Tue, 15 Dec 2020 13:08:24 +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 UHYDE0i12F8/fwAAbx9fmQ (envelope-from ) for ; Tue, 15 Dec 2020 13:08:24 +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 0EEDE9403A6 for ; Tue, 15 Dec 2020 13:08:24 +0000 (UTC) Received: from localhost ([::1]:35434 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kpA3y-0006lX-TK for larch@yhetil.org; Tue, 15 Dec 2020 08:08:22 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:48666) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kpA3n-0006lJ-8N for guix-devel@gnu.org; Tue, 15 Dec 2020 08:08:11 -0500 Received: from mail-wm1-x32d.google.com ([2a00:1450:4864:20::32d]:51202) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kpA3L-0002Hh-VX; Tue, 15 Dec 2020 08:08:10 -0500 Received: by mail-wm1-x32d.google.com with SMTP id v14so16821485wml.1; Tue, 15 Dec 2020 05:07:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:in-reply-to:references:date:message-id :mime-version:content-transfer-encoding; bh=Fz9DHzo9bPLTf1z0uZ/dhRJbfoSN2zT2eBBZK2FTURw=; b=SGUewUMHUf3pUgD0Cn2mKxPWPPXOw7+G40RbcU7cmZSualm+aXyDHF5BQAoZF9ZsYO zl4As217bh8iN8DJl+Aege2oOzi6NyegPVcP+N8UIVTzWWfUxfCvwGLqLW0vjEHjb3Me TgUXq8n5eVm2qMYYt4z2M6tgx33N6OwALRD0WszaJ+RLH4Cq3oFsaH0/s5+lCZcXCMPQ J58QjmSH4g2BA1KPG0C61UmpUoFqVvdnOGveAy+4l0FAKZCayNtCYAoyiNszjqUInml0 gizXppJP8zHzwm3eI/rUVorUpJHe7FY4p6Q13xVsalvgRJC34/ar1buCbuU42RmMumnC zF8g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:in-reply-to:references:date :message-id:mime-version:content-transfer-encoding; bh=Fz9DHzo9bPLTf1z0uZ/dhRJbfoSN2zT2eBBZK2FTURw=; b=NVKErJCxrH5cV3Oiv0MwOhTSZbQbKaY5vjHkpLIQj6VDJ5OvS58aliaUGi73xkO/6N kNphAYHZ3l/kcQSxXk8xVAxvk6TmkgMYrgnRuJRySTiP69qeZPft0Ohcfwal2HBfsDN7 dcpJdFzru/ZsdrYgkKSfG17XgK+vyrIn9ri/ROH28Y7VVicJcjsyGt7Ukmok75bPndI5 NdK9aKduOHKY/iaFQJ277Kh6NBEG23Bsd0LMpTIx/IVCSxiZ+ZP/QwOrph2hwHtwCGOT xezi7MCVYdn4v8zI2lfjWnJHQFo5rll2HqHDBS/WZNgPW1VcxU7Q2p/TJH62mkqyBZSd 3TEw== X-Gm-Message-State: AOAM532HJbb7JYhK22JPS0MASzuvaFqsX1T6+445eWZRVkpImVh6KY3G GYvQN6uJCALfRyYmZwiw4IB5RZRbSqI= X-Google-Smtp-Source: ABdhPJzSNsxrBMETOKwZN4aNCWsdfvd1K6djowY5Irb0b7GkCFzIXzTekmvwrixBgzcAgomt0NjmvQ== X-Received: by 2002:a1c:35c2:: with SMTP id c185mr33268851wma.74.1608037662058; Tue, 15 Dec 2020 05:07:42 -0800 (PST) Received: from lili ([2a01:e0a:59b:9120:65d2:2476:f637:db1e]) by smtp.gmail.com with ESMTPSA id y63sm20062957wmd.21.2020.12.15.05.07.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 15 Dec 2020 05:07:41 -0800 (PST) From: zimoun To: Ludovic =?utf-8?Q?Court=C3=A8s?= Subject: Re: Finding versions of packages In-Reply-To: <878s9znwt4.fsf@gnu.org> References: <5ebe44900cb13f637d87309f4567624d16d3ca15@hey.com> <87pn3cu0yf.fsf@gnu.org> <86im94o8z9.fsf@gmail.com> <878s9znwt4.fsf@gnu.org> Date: Tue, 15 Dec 2020 14:03:20 +0100 Message-ID: <86y2hzmdbb.fsf@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2a00:1450:4864:20::32d; envelope-from=zimon.toutoune@gmail.com; helo=mail-wm1-x32d.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action 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: Development of GNU Guix and the GNU System distribution , Ryan Prior Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: "Guix-devel" X-Migadu-Flow: FLOW_IN X-Migadu-Spam-Score: -1.21 Authentication-Results: aspmx1.migadu.com; dkim=fail (headers rsa verify failed) header.d=gmail.com header.s=20161025 header.b=SGUewUMH; dmarc=fail reason="SPF not aligned (relaxed)" header.from=gmail.com (policy=none); 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-Migadu-Queue-Id: 0EEDE9403A6 X-Spam-Score: -1.21 X-Migadu-Scanner: scn0.migadu.com X-TUID: fn7gWUSTLYWj Hi, On Tue, 15 Dec 2020 at 12:16, Ludovic Court=C3=A8s wrote: > However, doing such composition on a per-package basis and as the > default way of composing packages is inefficient and, more importantly, > the resulting compositions may not work. A package written for Python 2 > may not work with Python 3, and so on. About inefficiency, I agree. The number of inferiors should be minimized, IMHO. By =E2=80=9Cthe resulting composition may not work=E2=80=9D, you mean that = what is propagated may be incompatible, right? For example, bytecode or ABI incompatibilities. Cheers, simon