From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp10.migadu.com ([2001:41d0:2:bcc0::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms0.migadu.com with LMTPS id KEUdFo/q22EejgAAgWs5BA (envelope-from ) for ; Mon, 10 Jan 2022 09:13:03 +0100 Received: from aspmx1.migadu.com ([2001:41d0:2:bcc0::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp10.migadu.com with LMTPS id ABbMDo/q22H7oAAAG6o9tA (envelope-from ) for ; Mon, 10 Jan 2022 09:13:03 +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 ED8BB115D4 for ; Mon, 10 Jan 2022 09:13:02 +0100 (CET) Received: from localhost ([::1]:55926 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1n6pna-0000R4-3u for larch@yhetil.org; Mon, 10 Jan 2022 03:13:02 -0500 Received: from eggs.gnu.org ([209.51.188.92]:43904) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n6pmR-0000Qn-Jm for guix-devel@gnu.org; Mon, 10 Jan 2022 03:11:51 -0500 Received: from [2001:470:142:3::e] (port=41858 helo=fencepost.gnu.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n6pmQ-0001J9-3H; Mon, 10 Jan 2022 03:11:50 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-Version:In-Reply-To:Date:References:Subject:To: From; bh=dJmHbWVlrNfuObydxwhz6tKEaUUBoojfFAMWXTTTidI=; b=hQiEIkvGfbKsRZjY0+6a zDm9PuTJJQ00nA8OhkxBg5nZ8CDqQzoxelLH2IEcYeMHC7ZK/hCA7auJ6jnQxHOsoeCxD396aZ0zj rpddD+4+psCxmWclZ19ZTk/c/H5y+jhY3OflCog/RdvJeTSayYbLvoIM3f9GQVjKSF4MN9JQN7smH VefQZAsgBHbRgumXTUCkzQYmzgm4y/sJ4yexRDt6rxv2NcoQgVTor3amCl2vkf7SW36gH3+wZzEpF dEwKovkRFu1jBb+qQXLZ/OGwvsOuPUhkOMI8dCj4NH5uSMeN9+NlzTguZ6ZO+61GcNCAtwVG3umgr vQxN24qRntm4Rw==; Received: from [2a01:e0a:19b:d9a0:2f3b:16f2:b776:3ef9] (port=51126 helo=meije) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n6pmM-00033J-GS; Mon, 10 Jan 2022 03:11:49 -0500 From: Mathieu Othacehe To: Maxime Devos Subject: Re: Branch with only available substitutes ? References: <87tueczl0o.fsf@ngraves.fr> <1c4d376a9b1b117d86c484bdf33aee2d733f6ca6.camel@telenet.be> Date: Mon, 10 Jan 2022 09:11:44 +0100 In-Reply-To: <1c4d376a9b1b117d86c484bdf33aee2d733f6ca6.camel@telenet.be> (Maxime Devos's message of "Mon, 10 Jan 2022 00:35:25 +0100") Message-ID: <87lezohuwv.fsf@gnu.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable 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: , Cc: guix-devel@gnu.org, Nicolas Graves Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: "Guix-devel" 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=1641802383; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-unsubscribe:list-subscribe:list-post:dkim-signature; bh=dJmHbWVlrNfuObydxwhz6tKEaUUBoojfFAMWXTTTidI=; b=TWommlhtDb3AgzJh2xt6nI5rvU4X0lmx4tH+C3ihpCCv2CzGd0Ijl3/+yh44XsTPszEu5i eAk7lW3a9KCNB3mggaSybUxZfi/fuSBatEUunvRQtSwn2XM8hbgFs6CjhaglZazebkvi3/ c10MiW2lhQNOq5I+AXsN+LN6G6qkOqBBJ6ibEIw1Y0TsPPHH9Y5sRQXMT/fUjHRC52YFok QsURz5sRTsaebFY73zV1xEL3SIEWRZz3CECyZrNiMSNpdJmbWVmf7DkPQC0kENlBEOma69 pMWZ3tpFz1d6pQ84CNRniSAVLKNEB3qJHndNmvmdMX3aOCuwe6HQ184lk1pEDA== ARC-Seal: i=1; s=key1; d=yhetil.org; t=1641802383; a=rsa-sha256; cv=none; b=XA6LPxuBkMZijhay3LlJAZPTrOM+r7YF+zvR+J29QN+mYet+SccCRwpj2TkfVUAQ55xL71 68e9UC/T1gWHmEJtOHd1IKIN/jhlYBu1KtvXwB/SWn/WchCh1rpEPreFKEgeVoYIZg59UN 93Of2/WPnhsZx4jQcLXX/T0BbCJdHQ3Tl+awA6js4P0qKexMYNwODTu4+vLKmsaxdhCIBt gHzk7VDJI43CergE5DZNRjyxTwo0OD0p52iK0yLsu+Nn/+FzaUUHb8e+nejxemMwoy9aUC PySI7Ymmu/hWN9FD5QKvbTtbJsAx1eykcGc0lbtXQBEwZ89rq7sgnHwHobEsTw== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=pass header.d=gnu.org header.s=fencepost-gnu-org header.b=hQiEIkvG; dmarc=pass (policy=none) header.from=gnu.org; 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: -4.51 Authentication-Results: aspmx1.migadu.com; dkim=pass header.d=gnu.org header.s=fencepost-gnu-org header.b=hQiEIkvG; dmarc=pass (policy=none) header.from=gnu.org; 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-Queue-Id: ED8BB115D4 X-Spam-Score: -4.51 X-Migadu-Scanner: scn1.migadu.com X-TUID: Qe800vAOqKik Hello, > Short answer: yes, but someone has to not just ask whether it's > possible or tell it =E2=80=98should be easy=E2=80=99, and actually implem= ent all this. > Also, have a look at channel-with-substitutes-available. > It's not sufficiently general for your use case though. There's also a pending patch extending this procedure to support manifests: https://issues.guix.gnu.org/47929. It still needs some work but it could be conceptually close from what Nicolas is asking. Mathieu