From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.bugs Subject: bug#28897: 25.2.50; Document significance of package-archive-priorities Date: Mon, 15 Jul 2019 00:22:15 +0200 Message-ID: <87sgr8uui0.fsf@mouse.gnus.org> References: Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="82125"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: 28897@debbugs.gnu.org To: Allen Li Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Jul 15 00:30:04 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1hmn0O-000L5p-40 for geb-bug-gnu-emacs@m.gmane.org; Mon, 15 Jul 2019 00:30:04 +0200 Original-Received: from localhost ([::1]:34432 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hmmte-0004RP-8X for geb-bug-gnu-emacs@m.gmane.org; Sun, 14 Jul 2019 18:23:06 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:49645) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hmmtb-0004RH-Jb for bug-gnu-emacs@gnu.org; Sun, 14 Jul 2019 18:23:04 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hmmta-0008R3-EC for bug-gnu-emacs@gnu.org; Sun, 14 Jul 2019 18:23:03 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:37345) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1hmmtZ-0008Qj-RL for bug-gnu-emacs@gnu.org; Sun, 14 Jul 2019 18:23:01 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1hmmtZ-0005sZ-LS for bug-gnu-emacs@gnu.org; Sun, 14 Jul 2019 18:23:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Lars Ingebrigtsen Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 14 Jul 2019 22:23:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 28897 X-GNU-PR-Package: emacs Original-Received: via spool by 28897-submit@debbugs.gnu.org id=B28897.156314294122521 (code B ref 28897); Sun, 14 Jul 2019 22:23:01 +0000 Original-Received: (at 28897) by debbugs.gnu.org; 14 Jul 2019 22:22:21 +0000 Original-Received: from localhost ([127.0.0.1]:46163 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hmmsv-0005rB-88 for submit@debbugs.gnu.org; Sun, 14 Jul 2019 18:22:21 -0400 Original-Received: from quimby.gnus.org ([80.91.231.51]:59432) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hmmst-0005r2-UC for 28897@debbugs.gnu.org; Sun, 14 Jul 2019 18:22:20 -0400 Original-Received: from cm-84.212.202.86.getinternet.no ([84.212.202.86] helo=marnie) by quimby.gnus.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1hmmsp-0006hm-Ly; Mon, 15 Jul 2019 00:22:18 +0200 In-Reply-To: (Allen Li's message of "Wed, 18 Oct 2017 16:47:24 -0700") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:163056 Archived-At: Allen Li writes: > The significance of the priorities for package-archive-priorities is > not documented properly in the docstring for > package-archive-priorities. > > A few things come to mind: > > 1. The archive priority is prepended to the package version when > checking for updates. This is alluded to in the docstring, but not > stated explicitly. --- When installing packages, the package with the highest version number from the archive with the highest priority is selected. When higher versions are available from archives with lower priorities, the user has to select those manually. --- As far as I can tell from reading the code, this is exactly what happens. (It creates a (cons priority version) thing for comparison. > 2. Already installed packages have priority 0. This is especially > important for archives with negative priorities. Setting an archive > to a negative priority means that packages from that archive will not > be considered for upgrading (since the currently installed package has > priority 0 and will always be "higher"/"newer". I did some testing, and it does seem that installed packages get a 0 priority, so I've documented what you mention here. But I don't know whether that's a bug or not -- it's not documented, but the `archive' slot of installed packages is nil: (package-desc-archive #s(package-desc js2-mode (20150909) "Improved JavaScript editing mode" ((emacs (24 1)) (cl-lib (0 5))) nil nil "/home/larsi/.emacs.d/elpa/js2-mode-20150909" ((:keywords "languages" "javascript") (:url . "https://github.com/mooz/js2-mode/")) nil)) => nil So it happens as a side effect of that. -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no