Re: Odd behavior with --dry-run and --upgrade

[ludo@gnu.org (Ludovic Courtès)]

Hi!

Alex Kost <alezost@gmail.com> skribis:

> Roel Janssen (2016-07-23 18:11 +0300) wrote:
>
>> Dear Guix,
>>
>> For some time now, running `guix package --dry-run --upgrade' results in
>> build actions involving grafting.  For a dry-run, I find that really
>> odd.  I believe the correct behavior should be what can be achieved
>> with: `guix package --dry-run --no-grafts --upgrade'.
>
> I'm totally agree with this; nowadays I always use --dry-run with
> --no-grafts option.

Same here…

> As a user I expect that --dry-run means no building at all.
>
> BTW it's not just about ‘guix package --dry-run --upgrade’, it relates
> to all commands, for example ‘guix build --dry-run foo’, etc.
>
> OTOH, if a future ‘--dry-run’ would mean what ‘--dry-run --no-grafts’
> means now, than how to achieve what ‘--dry-run’ means now?  Or rather:
> does anyone use just --dry-run (without --no-grafts)?  Is it really
> useful?

In theory it could be useful for ‘guix build’, since it’s a “low level”
tool and people using it may want to be able to distinguish between
grafted and non-grafted results.

But honestly, I think changing ‘--dry-run’ to do ‘--dry-run --no-grafts’
would be fine, and probably better than the current situation.

Thoughts?

Ludo’.