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Fri, 29 Apr 2022 16:53:14 -0400 Received: from smtp.polymtl.ca ([132.207.4.11]:40705) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nkXbz-0004F1-9W for help-guix@gnu.org; Fri, 29 Apr 2022 16:53:12 -0400 Received: from localhost (modemcable094.169-200-24.mc.videotron.ca [24.200.169.94]) by smtp.polymtl.ca (8.14.7/8.14.7) with ESMTP id 23TKr0g2022353 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 29 Apr 2022 16:53:06 -0400 DKIM-Filter: OpenDKIM Filter v2.11.0 smtp.polymtl.ca 23TKr0g2022353 To: Ricardo Wurmus Cc: zimoun , Maxim Cournoyer , Olivier Dion via Subject: Re: Questions regarding substitutes with debug output In-Reply-To: <871qxf1wh7.fsf@elephly.net> References: <877d7joe2w.fsf@laura> <87levx4ui1.fsf@gmail.com> <87ee1pur82.fsf@laura> <86mtg5eibr.fsf@gmail.com> <87mtg5qovg.fsf@laura> <87ee1ge0k4.fsf@gmail.com> <87bkwkq73s.fsf@laura> <87mtg327ww.fsf@elephly.net> <877d77rhhx.fsf@laura> <871qxf1wh7.fsf@elephly.net> Date: Fri, 29 Apr 2022 16:53:00 -0400 Message-ID: <87y1zna9xv.fsf@laura> MIME-Version: 1.0 Content-Type: text/plain; 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aspmx1.migadu.com; dkim=none; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of "help-guix-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="help-guix-bounces+larch=yhetil.org@gnu.org" X-Migadu-Spam-Score: -1.50 Authentication-Results: aspmx1.migadu.com; dkim=none; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of "help-guix-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="help-guix-bounces+larch=yhetil.org@gnu.org" X-Migadu-Queue-Id: 8D5793DC29 X-Spam-Score: -1.50 X-Migadu-Scanner: scn0.migadu.com X-TUID: utKOfdgS+6h+ On Fri, 29 Apr 2022, Ricardo Wurmus wrote: > Exactly the same way. The first argument to WITH-CHANNELS would be > (cons C G) and thus P and D would be picked from the set of C and G. C > and G can be specified with exact commits or branches, just like the > --channels option to =E2=80=9Cguix time-machine=E2=80=9D. > > We already have all the tools for WITH-CHANNELS =E2=80=94 that=E2=80=99s = (guix > inferior). We just don=E2=80=99t have a convenient syntax to do this wit= hout a > lot of boilerplate. Right. It would be great I think. However, time-machine does the job for now, at least for my case. But it would definitely allow for better channel granularity. To continue! --=20 Olivier Dion oldiob.dev