bug#38529: Make --ad-hoc the default for guix environment proposed deprecation mechanism

[Gábor Boskovits]

Hello Zimoun,

zimoun <address@hidden> ezt írta (időpont: 2019. dec. 13., P, 17:32):
>
> Hi Gábor,
>
> Sorry to be slow. :-)

I probably just did not express myself clearly enough.

>
> On Fri, 13 Dec 2019 at 17:28, Gábor Boskovits <address@hidden> wrote:
>
>
> > 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.
> >
> > This would minimze friction, as there will be a few scripts falling under 4.
> > This would also allow mirgating such scripts one by one. be defining
> > GUIX_ENVIRONMENT_DEPRECATED to 1 in some startup file, and using
> > GUIX_ENVIRONMENT_DEPRECATED=0 guix environment ... in scripts that are
> > fixed to use the new syntax.
> >
> >
> > What do you think?
>
> I am perfectly aligned! :-)

Great!

> It is exactly what I have tried to describe.
> Sorry again for being slow.

I am sorry for the confusion, my communication tends to slugghish, an
I am also a bit bound to
do some hand-waving :) I hope to improve on that

>
> Thank you.
> Do you plan to implement it? Do I give a try?

I would like to hear something from Ludo, as he was also a participant
of the IRC discussion.

After that I would not mind if you gave it a try, if you would like.
Otherwise I will implement it.

>
>
> All the best,
> simon


Best regards,
g_bor
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