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d=elephly.net; i=rekado@elephly.net; h=From:From:To:To:Cc:Cc:Subject:Subject:In-Reply-To:References:Date:Date:Message-ID:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id:Reply-To; bh=6US06yCPURjgnxsIJcQBuTYqkgZ913+rsnzuukatoUo=; b=Vq8mDEtHjvXhWr2oSaRjGNwaXyRlYkZ3hVh4oFwS2F21Ih7wlxQrjAQm2MSAewjd LsO17+Xzqu6bA1H09i+O38Y/gPlTdfDRdnDPVHe3N1KskM4mzHsHVc/JljSfwGCn41h LX/5CuZrgYbM52RbBOTFZI5uoJ8ORMSegHh+43hs= Received: by mx.zohomail.com with SMTPS id 172293486405118.5142316193037; Tue, 6 Aug 2024 02:01:04 -0700 (PDT) From: Ricardo Wurmus To: Marek =?utf-8?Q?Pa=C5=9Bnikowski?= Cc: guix-devel@gnu.org Subject: Re: Indication of build failure from substitute servers? In-Reply-To: <87o76bgrc1.fsf@marekpasnikowski.pl> ("Marek =?utf-8?Q?Pa?= =?utf-8?Q?=C5=9Bnikowski=22's?= message of "Fri, 02 Aug 2024 12:19:10 +0200") References: <87o76bgrc1.fsf@marekpasnikowski.pl> Date: Tue, 06 Aug 2024 11:00:59 +0200 Message-ID: <874j7ydnzo.fsf@elephly.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-ZohoMailClient: External Received-SPF: pass client-ip=136.143.184.58; envelope-from=rekado@elephly.net; helo=sender3-of-o58.zoho.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, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: 2.1.29 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-Flow: FLOW_IN X-Migadu-Country: US X-Migadu-Queue-Id: 769F96FDF7 X-Migadu-Scanner: mx12.migadu.com X-Migadu-Spam-Score: -9.50 X-Spam-Score: -9.50 X-TUID: FW9/8KWCg+HH Marek Pa=C5=9Bnikowski writes: > The proof of availability is in workflow itself. The project committers > NEVER commit anything to the master branch. Only the CI system > does. Instead, the committers push to a "pre-main" branch, and the CI > system picks the commits up one by one and attempts to build them as > usual. IMPORTANT POINT: *if* the commit builds correctly, it gets pushed > by CI to master branch, and the substitute is already available. *If* > the commit does not build, it gets rejected, and it never goes to > master. > > I currently do not know enough about Git to confidently propose a > solution to the problem of how to handle the reordering of the queued > work on a build failure, but I have a feeling it is not that hard to > solve. Prior art: https://docs.gitlab.com/ee/ci/pipelines/merge_trains.html An open problem is preserving commit signatures or perhaps changing the meaning of signatures by signing not the commit but the changes only. --=20 Ricardo