GNU bug report logs - #38529
Make --pure the default for `guix environment'?

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Message #53 received at 38529 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: Gábor Boskovits <boskovits <at> gmail.com>
Cc: Guix-devel <guix-devel <at> gnu.org>, 38529 <at> debbugs.gnu.org,
 zimoun <zimon.toutoune <at> gmail.com>
Subject: Re: bug#38529: Make --ad-hoc the default for guix environment
 proposed deprecation mechanism
Date: Mon, 16 Dec 2019 23:09:37 +0100

Hello,

Gábor Boskovits <boskovits <at> gmail.com> skribis:

> So in a more algorithmic manner:
> 1. if ad-hoc and inputs-of is present at the same invocation: fail
> hard. (With an error like incompatible options present)
> 2. if only ad-hoc is present, then print a deprecation warning (yes,
> we could make this suspendable with an environment variable, like you
> described)
> 3. if only inputs-of present, then do the new behaviour.
> 4. if neither ad-hoc nor inputs-of present then
>   a. if GUIX_ENVIRONMENT_DEPRECATED is 1: do the current behaviour,
>   b. if GUIX_ENVIRONMENT_DEPRECATED is undefined, or is not 1: do the
> new behaviour.

That sounds like a good plan to me.

#4 is the trickiest, and I think it’d be good to give users a bit of
time so they can start adjusting before deprecation is in effect.

Namely, we could start by introducing ‘--inputs-of’ and emitting a
warning in case #4 to suggest the use of ‘--inputs-of’.  Apart from the
warning, case #4 would still behave the same as now.

Three (?) months later, we implement what you describe above.  Hopefully
by that time many people got used to ‘--inputs-of’.

Thoughts?

Ludo’.

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