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[72.10.134.93]) by smtp.gmail.com with ESMTPSA id 9sm2345175qkc.52.2021.09.11.19.36.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 11 Sep 2021 19:36:56 -0700 (PDT) From: Maxim Cournoyer To: Leo Famulari Subject: Re: PEP 668 -- Graceful cooperation between external and Python package managers References: Date: Sat, 11 Sep 2021 22:36:55 -0400 In-Reply-To: (Leo Famulari's message of "Tue, 7 Sep 2021 12:08:19 -0400") Message-ID: <87sfyapliw.fsf@gmail.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Received-SPF: pass client-ip=2607:f8b0:4864:20::832; envelope-from=maxim.cournoyer@gmail.com; helo=mail-qt1-x832.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=ham 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: guix-devel@gnu.org Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: "Guix-devel" X-Migadu-Flow: FLOW_IN ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1631414231; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:in-reply-to:in-reply-to: references:references:list-id:list-help:list-unsubscribe: list-subscribe:list-post:dkim-signature; bh=J91Nyotj+M5OEmobFMYG7C0k9+acT0kLUDq8TeH+uoc=; b=adhNTb/U8fL4xOOxumv5LMmvuJr+B6IJlNlTGi8LFzC2EwbnNo9GIfzX8oaXEHTi/RRqQp EdPHkCfwdqScnJc+szNmf4TatKIqzsINXh87qroE31HZYHmG/7SqPS4xHMfyOUUNmbXAyk 7tiLAZwy6J6btL56B7JtI7kgAq49d0jTNEuAihoS30Y0/83KmpIw7X5kHDkg5Lh7CiWG6A 8WHkQde5Qi2NRATEep+xJm/A1fDI5eGhytXER8QAzMg9rtwvz9uD3f8jL/ENrJKuK+5eIC xczz8i2VLuYD0RwoyEgiV1Nt/d+fDpFUGDpqIA3SJ61X4oK5miJ56tgwA6CxZg== ARC-Seal: i=1; s=key1; d=yhetil.org; t=1631414231; a=rsa-sha256; cv=none; b=hWt985Ma8AYwM6Yv+dRXLl5i23mX/FpSJCvdIlvXMfSbmq2P2l5qxl92TIaXHXmnUS7bdH pSItuV1BL8kWARmNQkjHrF3uuLpH5chOm6blWgcG8qk9oLfQw3oCAq6mgzTsHettH6r6JY b7TLUt14dG/v5d5EzWpVoB++LUwQw2o2gVKOMadAowlRhapGChBAMG4klLpXzTFzvVO1Mx +UJoHhTq2HX/no4WRsWQVrz46pT0VPOcfV7wDqvgrVGQtfm9S1RxUMYv6P0RpCfC0C4S90 b+0XSNRys1lJ00u/VkoOzgX60DyYlhQZLhI2KykyHYUSL7sTge2vsHe2Z2eUWg== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gmail.com header.s=20210112 header.b=CSec26hC; 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-Spam-Score: -1.31 Authentication-Results: aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gmail.com header.s=20210112 header.b=CSec26hC; 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: 95206245E X-Spam-Score: -1.31 X-Migadu-Scanner: scn0.migadu.com X-TUID: PLzRkHyfwtAG Hello, Leo Famulari writes: > On Tue, Sep 07, 2021 at 04:39:28PM +0200, Maxime Devos wrote: >> See . >> I haven't looked closely into this myself. >> It might be relevant to Guix. >> >> For LWN subscribers, there is an article about the PEP: >> . > > Here is a link for everyone to read: > > https://lwn.net/SubscriberLink/867657/c4e77bb70e27c910/ Guix already makes life easier with dealing with Python environments (especially with GUIX_PYTHONPATH on core-updates), but it's nice to know this problem is getting addressed. IIUC, PEP 668 is about *warning* a pip user when installing a package would shadow a system one; it does so by reading a EXTERNALLY-MANAGED file in the Python library site-packages directory. So simply put, all we have to do to enable this future warning in pip is to install an EXTERNALLY-MANAGED file as a phase in our python-build-system. Thanks for the link! Maxim