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 ms9.migadu.com with LMTPS id AMYCD4vFPWQqgQEASxT56A (envelope-from ) for ; Tue, 18 Apr 2023 00:17:47 +0200 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 2KTYDovFPWQxKAAA9RJhRA (envelope-from ) for ; Tue, 18 Apr 2023 00:17:47 +0200 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 E80F753AC for ; Tue, 18 Apr 2023 00:17:46 +0200 (CEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1poX9v-0003cA-RK; Mon, 17 Apr 2023 18:17:15 -0400 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 1poX9t-0003by-Ul for guix-devel@gnu.org; Mon, 17 Apr 2023 18:17:14 -0400 Received: from cascadia.aikidev.net ([173.255.214.101]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1poX9r-0007AK-HY; Mon, 17 Apr 2023 18:17:13 -0400 Received: from localhost (unknown [IPv6:2600:3c01:e000:21:7:77:0:50]) (Authenticated sender: vagrant@aikidev.net) by cascadia.aikidev.net (Postfix) with ESMTPSA id 693211AB60; Mon, 17 Apr 2023 15:17:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=reproducible-builds.org; s=1.vagrant; t=1681769824; bh=AlqYDufQmnBMGmqOf7Y4W6lLRqHIvBCzPJTID2wYKtg=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=tg60OLAkeI0Y1Vcc7VxiQMKTf3cNawG7IuCTeS+/tN+j/LiArGxdCXUE2uPTEVPnX OdzL200HrZoum/C1Z/xPzfxCFc8EH0N506wpxN+UfOPnv5fIvHXqbeN77Z8+7DOAuK 0pn6nf7oqlmXzQWM0qOb+50tJ1OrIW/rDNriKq71mqbTO+lzVc0lFNhf/ksjSH1Zlh DGpzfNRve+M40Kgq8MWzLnAs34Dz9Dn0KKOTJ2cW98swKjUSKALzxgTohXiLKs9vkY jgCZjdiQFOtNxGczh7n4TSlu4VV6dOVewhT5rxMpH6YjZr+FvvWlNX80gPmAQ2Qxha vZac0UXyQA6rA== From: Vagrant Cascadian To: Simon Tournier , Ludovic =?utf-8?Q?Court?= =?utf-8?Q?=C3=A8s?= , Konrad Hinsen Cc: Guix Devel Subject: Re: Time travel accident In-Reply-To: <87354ye6t9.fsf@gmail.com> References: <87ttxeeisd.fsf@gnu.org> <87354ye6t9.fsf@gmail.com> Date: Mon, 17 Apr 2023 15:16:59 -0700 Message-ID: <87354ynoh0.fsf@wireframe> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha512; protocol="application/pgp-signature" Received-SPF: pass client-ip=173.255.214.101; envelope-from=vagrant@reproducible-builds.org; helo=cascadia.aikidev.net 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, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: guix-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: guix-devel-bounces+larch=yhetil.org@gnu.org X-Migadu-Country: US X-Migadu-Flow: FLOW_IN ARC-Seal: i=1; s=key1; d=yhetil.org; t=1681769867; a=rsa-sha256; cv=none; b=f1/oc7eOLhG7ZlokL/msNrPl7C5cOIs3cLIuk+EtBMc7Ot7+7er153yRQDoHkrDneUxScM 5V226fCsyVCxTg7Ke4YA0+YgbAsuw5Wlh4BFBAY0ZmdxbHQPbphyf/Yop6DFVW+Qjqxf8g sF1AKDE7I9lNKl3sfixHcOM2LR0pW7TILnjVnWV78HSRYSZ27l4U5LdnLS+jOpYyEeEdAk e6MNg79Gd1gf0P7gCm/ZNA+6aF+OkXpuo96mNcZrXsDKy+TFyCQojOQ7iDtmdobv6097xe u+HtO1r94g3oQc6fpFdykSaVPj6DT3nXsIQhRQIOH6fNtiXmTy8uNvEG8ZueIg== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=pass header.d=reproducible-builds.org header.s=1.vagrant header.b=tg60OLAk; dmarc=none; spf=pass (aspmx1.migadu.com: domain of "guix-devel-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-devel-bounces+larch=yhetil.org@gnu.org" ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1681769867; 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=aiFFSf81PFYtS3dAUa7Izxa/2THMEbf7nZ95OkgQtKI=; b=ktIE9Tpo/94v9/NaSW5bsxq5Y7ZY5MKj8VuW2eojOO29qIi66c0zunCBEZIcq8xY0wte34 t2mPdB88QhcUFw+iD7jP+Kc5O6bxuVh57HM63DZrItxxY87atX63GbwGF3K+9xUMYXtq7v OxcXSZWybxhkaqYWFKX6ZcBz8H99z+uC1PaGBpf7B3Xxb+EXOnBk52OQHUxC2L7OwYoxRD bc1be8AHHOCYFSeWs4X8GJ510/KxYvGbJL7q1KCJP+9p2P/8bAgpxmUYQ0XtSVIOLHiiXJ 3y4o0/EawOmudfphQIQ4m1wawOzHE/c6maWq0sToFzi0sP2wVFw9/cON9VQ5Bw== X-Migadu-Queue-Id: E80F753AC X-Migadu-Scanner: scn1.migadu.com Authentication-Results: aspmx1.migadu.com; dkim=pass header.d=reproducible-builds.org header.s=1.vagrant header.b=tg60OLAk; dmarc=none; spf=pass (aspmx1.migadu.com: domain of "guix-devel-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-devel-bounces+larch=yhetil.org@gnu.org" X-Migadu-Spam-Score: -3.81 X-Spam-Score: -3.81 X-TUID: jRAVcyY+kKyn --=-=-= Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 2023-04-17, Simon Tournier wrote: > On lun., 17 avril 2023 at 15:32, Ludovic Court=C3=A8s wrot= e: > >> My plan is to write a service that makes it easy to offload a build to a >> VM that runs with a different time (=E2=80=9Cin the past=E2=80=9D) or so= mething along >> these lines to mitigate the problem. > > Do you mean =E2=80=9Cin the future=E2=80=9D instead? We need to know if = the package > will still build with a different time from the future, no? I can see "in the past" being useful to handle builds with time-bombs that already slipped through the cracks, and "in the future" to detect these time-bombs while there is still time to fix them... > Wording aside :-) What do Reproducible Builds for that? Because > time-bomb seems similar as timestamp=E2=80=A6 At least for https://tests.reproducible-builds.org/debian on amd64/x86_64, I think one of the builds runs approximately 1 year, 1 month and 1 day in the future (+397 days?), which pretty much maximizes the chance of a difference in year, month or day, while sommewhat minimizing detection of time bombs... For detecting time-bombs, I would guess you want to test even further into the future, maybe 5-10 years or so. Much longer, and you are getting pretty close to 2038, which is an extra-special set of timebombs that will need to be addressed at some point! If guix someday has a long-term support release model, catching these sorts of time-bombs as early as possible becomes even more important, though with the current release model of once or twice a year or so, it is a bit less problematic... although if it happens in something low on the dependency graph, it of course gets more urgent! live well, vagrant --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEARYKAB0WIQRlgHNhO/zFx+LkXUXcUY/If5cWqgUCZD3FXAAKCRDcUY/If5cW qnzzAPwPSzLDYfiMo0xtDLR7CzYQVi7pPMaoU4xyfMflabvgJAEAx9aTKCJMfQun 5QvcDZZXiwjXOPkZVU/E8V01Vtgy2Aw= =zhF8 -----END PGP SIGNATURE----- --=-=-=--