From mboxrd@z Thu Jan 1 00:00:00 1970 From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=) Subject: Re: Why is "append" the activation service's "compose" procedure? Date: Thu, 29 Mar 2018 13:25:19 +0200 Message-ID: <87woxvw2cg.fsf@gnu.org> References: <87muyzdrjq.fsf@gmail.com> <87zi2vdm6r.fsf@gnu.org> <878tabs5fg.fsf@gmail.com> 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]:35658) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f1VgM-0004iF-3F for guix-devel@gnu.org; Thu, 29 Mar 2018 07:25:26 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1f1VgI-0000fB-44 for guix-devel@gnu.org; Thu, 29 Mar 2018 07:25:26 -0400 Received: from hera.aquilenet.fr ([2a0c:e300::1]:49310) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1f1VgH-0000ex-Sx for guix-devel@gnu.org; Thu, 29 Mar 2018 07:25:22 -0400 In-Reply-To: <878tabs5fg.fsf@gmail.com> (Chris Marusich's message of "Thu, 29 Mar 2018 09:32:19 +0200") 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+gcggd-guix-devel=m.gmane.org@gnu.org Sender: "Guix-devel" To: Chris Marusich Cc: guix-devel@gnu.org Hello Chris, Chris Marusich skribis: > By the way, I noticed that the cups-service-type also uses "append" as > its "compose" procedure. I think this is suspicious. The comment in > the code says: > > ;; Extensions consist of lists of packages (representing CUPS > ;; drivers, etc) that we just concatenate. > (compose append) According to the comment, it should be =E2=80=98concatenate=E2=80=99 instea= d of =E2=80=98append=E2=80=99. But like you write, it=E2=80=99s plausible that nobody tried to extend =E2=80=98cups-service-type=E2=80=99 so far, which is why we didn=E2=80=99t = have any problems. I think you can go ahead and make this change. Thanks, Ludo=E2=80=99.