From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp11.migadu.com ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms5.migadu.com with LMTPS id YK3tMVYjjGNjXgEAbAwnHQ (envelope-from ) for ; Sun, 04 Dec 2022 05:34:30 +0100 Received: from aspmx1.migadu.com ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp11.migadu.com with LMTPS id EIvnMVYjjGMjtwAA9RJhRA (envelope-from ) for ; Sun, 04 Dec 2022 05:34:30 +0100 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 8EC5F1177C for ; Sun, 4 Dec 2022 05:34:30 +0100 (CET) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1p1gh8-0005oh-1e; Sat, 03 Dec 2022 23:33:38 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1p1gh6-0005oB-0h for emacs-orgmode@gnu.org; Sat, 03 Dec 2022 23:33:36 -0500 Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1p1gh4-0004uk-5Z; Sat, 03 Dec 2022 23:33:35 -0500 Received: from pmg3.iro.umontreal.ca (localhost [127.0.0.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 5069044185F; Sat, 3 Dec 2022 23:33:32 -0500 (EST) Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id DF5EF441B05; Sat, 3 Dec 2022 23:33:26 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1670128406; bh=wt3dQCdzsfTb5iLOwBjj0Sncod/blx9EDQa/9OKGM3k=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=gw8mmtxtW26qGSdfCdQIYqRi+kcv3fLmket1dckY/aTBz+rQXpNlr13dbTSdRQLr9 Ug+nc7+GZkHpNt+SPkJLQE2qbcQOYzJTzKoGsJZ9+2TUKSJ5nSqSc/CGHoskC1EvRC zDkXSmbzEAPTTQ/FoXJDh5fC/F2dLVk0nUZDr0SWGsoGTBiT+2tQ6VTx3lgCipAJ1k gM5tCSeFCsD/NKg4YlpWPCoXZTXipCpIxmYeYGpEC3Pjz7oCY4lxcwIS/YrCVpvmDy Ut9gmjTocSsoHf7tl3WjZerh1rqJ4zW583Ns0wQQVJXhnKDj1mAiy17F6BRfSmnfVh 5IypCSncEybnQ== Received: from pastel (unknown [45.72.193.52]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 3CAFC12044C; Sat, 3 Dec 2022 23:33:26 -0500 (EST) From: Stefan Monnier To: Tom Gillespie Cc: Ihor Radchenko , "emacs-orgmode@gnu.org" , Bastien , Ihor Radchenko Subject: Re: org-assert-version considered harmful In-Reply-To: (Tom Gillespie's message of "Sat, 3 Dec 2022 20:22:57 -0800") Message-ID: References: <875yhsujkq.fsf@localhost> <87h71ct10n.fsf@localhost> <87tu5bbajh.fsf@localhost> <87r10ey8ov.fsf@localhost> <87o7v4dvon.fsf@gnu.org> <87pmfijrvw.fsf@localhost> <87y1u4ec18.fsf@gnu.org> <871qqnjjdw.fsf@localhost> <87zgd85vc9.fsf@localhost> <87359yl2w5.fsf@localhost> Date: Sat, 03 Dec 2022 23:33:25 -0500 User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain Received-SPF: pass client-ip=132.204.25.50; envelope-from=monnier@iro.umontreal.ca; helo=mailscanner.iro.umontreal.ca X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-orgmode@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "General discussions about Org-mode." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-orgmode-bounces+larch=yhetil.org@gnu.org Sender: emacs-orgmode-bounces+larch=yhetil.org@gnu.org X-Migadu-Flow: FLOW_IN X-Migadu-Country: US ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1670128470; 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=GBvUj5IooL8CoeZ29YttjA1kTl7vuTfQxiqOPKoVkvU=; b=mxNJ5mf57snpNVgooG50fm32o6HJIPw1+6csFELALLMDCwwxsgeT9/2ukt/5tAaNHlk45t 5QN3Rm73zRnW3GxFmN0ph7PsmZn/9pRbrpH1mkwZmL+i3E5BGRy5DYHaMAiZQCGBPcFpgd C0+ICFLOFXBgLu9FrkQbf0pN8Y1Clgzc1LAU6Kd3XKfF9fgVbMmBxbWOAWVNWWpF6inhCJ TfEhZCB7CQzaVJIZP0i0ai76CTQd2OuH89ksC3JFGRi/pht+xbFdPqvzQy1usdC88NiOfj ZkorETEjDlLP3Zdft8576sV/gF8EXBI1QbsWiYsfVmdefTl0ZZQPZ2B7PYdbjA== ARC-Seal: i=1; s=key1; d=yhetil.org; t=1670128470; a=rsa-sha256; cv=none; b=JFmUFUsUJoWqbCiINlsxJqEYAIiKMEQfWpS7ibWHtR7lXO7pxafJVxYKM1bFHtJykq4BV+ RTAULt3AJgCSaNe7iWyJuAGjX6NiGe26pVq2+2+rCCuonutkTeAG6+EIORghNiiOBaWbA0 FceVuOrd/lr2Ni8JAYNnV993llGdinDuqCS/rP2J1/43QUhNKMvpdtxS00ccoMY6U8Qyni 5aJc3+9kByaI9htcAB/M5HXz5BTyCvfEymAwRJoProT+SreF9cBgbO0Ffbwkl1W6JhK3oa da5RyPe6CrNlKod7DF981insw3ssCltxYr4vBKDHue9FsPYRxxUfWrR/O4PBQw== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=pass header.d=iro.umontreal.ca header.s=mail header.b=gw8mmtxt; dmarc=pass (policy=quarantine) header.from=iro.umontreal.ca; spf=pass (aspmx1.migadu.com: domain of "emacs-orgmode-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="emacs-orgmode-bounces+larch=yhetil.org@gnu.org" X-Migadu-Spam-Score: -9.96 Authentication-Results: aspmx1.migadu.com; dkim=pass header.d=iro.umontreal.ca header.s=mail header.b=gw8mmtxt; dmarc=pass (policy=quarantine) header.from=iro.umontreal.ca; spf=pass (aspmx1.migadu.com: domain of "emacs-orgmode-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="emacs-orgmode-bounces+larch=yhetil.org@gnu.org" X-Migadu-Queue-Id: 8EC5F1177C X-Spam-Score: -9.96 X-Migadu-Scanner: scn0.migadu.com X-TUID: tv9Mz6TEHVQi > when using unload-feature), so yes, ideally Emacs would make it > possible to have multiple versions of the same package. Having multiple versions *installed* has been supported since "for ever" (AFAIK support for that was added very early in `package.el`s life, before Emacs-24.1). Having multiple versions loaded at the same time in an Emacs session? I think we're very far from supporting that. BTW, rather than unloading, `package.el` relies on forcibly "re"loading from the new version the already loaded files from the old version. It suffers from a different set of problem :-( [ I suspect `defvar` is the main problem for that solution. ] Stefan