From mboxrd@z Thu Jan 1 00:00:00 1970 From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=) Subject: bug#22629: =?UTF-8?Q?=E2=80=9CStable=E2=80=9D?= branch Date: Mon, 03 Sep 2018 21:52:00 +0200 Message-ID: <87zhwywe8v.fsf@gnu.org> References: <87vb5vsffd.fsf@gnu.org> <87pny2iks2.fsf@gnu.org> <877ekagtg9.fsf@netris.org> <87zhx5msfl.fsf@pompo.co> <87lg8pccys.fsf_-_@netris.org> <87zhx59gh3.fsf@elephly.net> <875zzs9wzl.fsf@netris.org> <874lfcxd2v.fsf_-_@gnu.org> <87wos8lzcj.fsf@pompo.co> <878t4nqzqv.fsf@gnu.org> <87r2iau0wz.fsf@pompo.co> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:52950) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fwuuF-0002zu-El for bug-guix@gnu.org; Mon, 03 Sep 2018 15:53:04 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fwuuE-0004av-N3 for bug-guix@gnu.org; Mon, 03 Sep 2018 15:53:03 -0400 Received: from debbugs.gnu.org ([208.118.235.43]:39583) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fwuuE-0004an-If for bug-guix@gnu.org; Mon, 03 Sep 2018 15:53:02 -0400 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1fwuuE-0005Yy-FO for bug-guix@gnu.org; Mon, 03 Sep 2018 15:53:02 -0400 Sender: "Debbugs-submit" Resent-Message-ID: In-Reply-To: <87r2iau0wz.fsf@pompo.co> (Alex Sassmannshausen's message of "Mon, 03 Sep 2018 16:10:36 +0200") List-Id: Bug reports for GNU Guix List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guix-bounces+gcggb-bug-guix=m.gmane.org@gnu.org Sender: "bug-Guix" To: Alex Sassmannshausen Cc: 26608@debbugs.gnu.org, 22629@debbugs.gnu.org, 32022@debbugs.gnu.org Hi Alex, Alex Sassmannshausen skribis: > Ludovic Court=C3=A8s writes: [...] >> I just had a bright idea (yes!): this can be addressed by writing >> something like this in ~/.config/guix/channels.scm: >> >> (map latest-commit-with-substitutes-available >> %default-channels) >> >> The hypothetical =E2=80=98latest-commit-with-substitutes-available=E2=80= =99 would use >> (git) and (guix ci) to find the latest commit for which substitutes of >> interest are available, and would return: >> >> (channel >> ;; =E2=80=A6 >> (commit "cabbag3")) ;the ideal commit > > This sounds incredibly interesting =E2=80=94 and it is testament once aga= in to > the power of Guix that this kind of solution could be feasible! Just to be clear: I don=E2=80=99t think this would be a substitute for a =E2=80=9Cstable=E2=80=9D branch; rather, I view as a way to have user-defin= ed policies such as =E2=80=9Cpull up to the latest commit for which there=E2=80=99s a s= ubstitute for IceCat.=E2=80=9D > Thinking this through in my head somewhat, I had the following thoughts: > - This procedure is invoked client side, where the channel is defined > - That means the git searching is done client side, on every invocation > of guix (I guess this might be cacheable?) On every invocation of =E2=80=98guix pull=E2=80=99 only. > I have no idea what the performance cost would be. I guess you would > use "guix weather" to turn the set of requested packages into a manifest > which can then be checked with it. As I imagine it, the cost would be a few HTTP queries to the Cuirass API. I should try to come up with an example to better explain what I had in mind! > The question of security updates is tricky at the moment already =E2=80= =94 I > would hazard a guess that many people bail out of upgrading when they > can't get substitutes for their entire profile / system right now, which > means they are not getting security upgrades for package (a) when a > substitute for (b) fails. That=E2=80=99s probably true, and I agree it=E2=80=99s problematic. What I typically do is =E2=80=9Cguix pull && guix package -n -u=E2=80=9D. = Then I look at things that would be built; if, say, LibreOffice is among them, I wait for a little while and try again later, until I can get enough substitutes. That usually works okay, but it fails if it turns out that one of the dependencies fails to build: substitutes never become available in that case. Ludo=E2=80=99.