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Subject: bug#37978: [PATCH] guix: new command "guix time-machine"
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From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@gnu.org>
References: <m1bltzd4z7.fsf@ordinateur-de-catherine--konrad.home>
 <87y2wt3ycb.fsf@gnu.org>
 <m1bltmzvpg.fsf@ordinateur-de-catherine--konrad.home>
 <m1h83e5u7v.fsf@fastmail.net>
Date: Fri, 15 Nov 2019 23:35:52 +0100
In-Reply-To: <m1h83e5u7v.fsf@fastmail.net> (Konrad Hinsen's message of "Fri,
 08 Nov 2019 15:16:36 +0100")
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To: Konrad Hinsen <konrad.hinsen@fastmail.net>
Cc: 37978-done@debbugs.gnu.org

Hi Konrad,

Konrad Hinsen <konrad.hinsen@fastmail.net> skribis:

> Konrad Hinsen <konrad.hinsen@fastmail.net> writes:
>
>> Thanks for your detailed comments, most of which I agree with, and I
>> will make the required changes.
>
> I just submitted two new patches. Looking forward to everyone's feedbck!

I=E2=80=99ve just applied them, thank you!

I followed up with one commit to gracefully handle Git errors (e.g.,
when one type =E2=80=98--commit=3Dfoobar=E2=80=99) and another one to handl=
e build options
like the other commands.  Let me know if anything looks wrong.

Anyway, I can do things like this:

--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guix time-machine --commit=3D65956ad3526ba09e1f7a40722c96c=
6ef7c0936fe -- package -A |wc -l
Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.or=
g/git/guix.git'...
guile: warning: failed to install locale
warning: failed to install locale: Invalid argument
7666
--8<---------------cut here---------------end--------------->8---

=E2=80=A6 where the commit in question is from June 2018.  Pretty fun!

It would be neat if the =E2=80=9CUpdating=E2=80=A6=E2=80=9D message wouldn=
=E2=80=99t show up when in
fact everything is already available.  Also, it=E2=80=99d be nice if we cou=
ld
write (and in =E2=80=98guix pull=E2=80=99 too) =E2=80=98--date=3D2019-07-07=
=E2=80=99 or
=E2=80=98--date=3Dlast-month=E2=80=99.  Future work!  :-)

Thanks again for this nifty command!

Ludo=E2=80=99.