From mboxrd@z Thu Jan 1 00:00:00 1970 From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=) Subject: bug#21784: Old XZ tarballs Date: Mon, 02 Nov 2015 14:37:56 +0100 Message-ID: <87r3k8jzd7.fsf@gnu.org> References: <87r3kd8lpb.fsf@gnu.org> <20151030194730.4a2639ae@tukaani.org> <87si4sb02k.fsf_-_@gnu.org> <20151031202908.5548817d@tukaani.org> <87y4ei58dk.fsf@gnu.org> <20151102140718.4414a8d7@tukaani.org> 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]:58754) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZtFKF-0000aZ-12 for bug-guix@gnu.org; Mon, 02 Nov 2015 08:39:08 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZtFKA-0006KH-6x for bug-guix@gnu.org; Mon, 02 Nov 2015 08:39:06 -0500 Received: from debbugs.gnu.org ([208.118.235.43]:57905) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZtFKA-0006KC-3C for bug-guix@gnu.org; Mon, 02 Nov 2015 08:39:02 -0500 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1ZtFK9-0003P7-Pp for bug-guix@gnu.org; Mon, 02 Nov 2015 08:39:01 -0500 Sender: "Debbugs-submit" Resent-Message-ID: In-Reply-To: <20151102140718.4414a8d7@tukaani.org> (Lasse Collin's message of "Mon, 2 Nov 2015 14:07:18 +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-bounces+gcggb-bug-guix=m.gmane.org@gnu.org To: Lasse Collin Cc: 21784@debbugs.gnu.org Lasse Collin skribis: > On 2015-11-01 Ludovic Court=C3=A8s wrote: >> Lasse Collin skribis: >>=20 >> > On 2015-10-30 Ludovic Court=C3=A8s wrote: >>=20 >> [...] >>=20 >> >> Guix does automatically mirror tarballs via its =E2=80=9Csubstitute= =E2=80=9D >> >> mechanism. However, users can turn it off, in which case they end >> >> up downloading the tarball from the upstream URL specified in the >> >> package recipe. >> > >> > OK. :-) Why would users turn it off though? >>=20 >> The substitute mechanism is very generic; it=E2=80=99s not just about >> mirroring tarballs: >>=20 >> http://www.gnu.org/software/guix/manual/html_node/Substitutes.html >>=20 >> Some people might prefer to build things locally rather than download >> pre-built items. > > That makes sense, but I don't understand how it implies that the source > packages will then be downloaded from upstream servers. It might sound counter-intuitive, but our server at gnu.org provides substitutes for =E2=80=9Cthings=E2=80=9D users could do locally; these =E2= =80=9Cthings=E2=80=9D include building software, and downloading source. Quoting the above page: Substitutes can be anything resulting from a derivation build (see Derivations). Of course, in the common case, they are pre-built package binaries, but source tarballs, for instance, which also result from derivation builds, can be available as substitutes. > Anyway, I'm sorry for the hassle and for perhaps making a mountain out > of a molehill. No problem. It is best if URLs remain stable over time, but I understand there are cost constraints related to hosting. Maybe an option for you in the longer term would be to use a service such as savannah.gnu.org, which could host tarballs virtually forever and which is mirrored. Thanks, Ludo=E2=80=99.