[debbugs-tracker] bug#31456: closed (guix size tries to fetch substitute information for installed package.)

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Your message dated Wed, 16 May 2018 15:29:04 +0200
with message-id <address@hidden>
and subject line Re: bug#31456: guix size tries to fetch substitute information 
for installed package.
has caused the debbugs.gnu.org bug report #31456,
regarding guix size tries to fetch substitute information for installed package.
to be marked as done.

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31456: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=31456
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--- Begin Message --- Subject: guix size tries to fetch substitute information for installed package. Date: Mon, 14 May 2018 22:10:07 +0200

I'm on guix 563ab27bd4caead5676bbd515c54b25100c98960 on guixsd.
$ guix package -I; contains
lilypond        2.19.80 out
/gnu/store/jhmz7wpb93hryzqq32kcb4fs9cd84jyi-lilypond-2.19.80
I installed lilypond with that guix version.

$ guix size lilypond; gives me
guix size: error: no available substitute information for
'/gnu/store/6zyrglcmk8l4xpwvg6hgq1al81d7fr1w-lilypond-2.19.80'

I have no idea how this happens.
A wild guess is that store/jhmz.. is a grafted version, and guix size
looks for the ungrafted one?

Martin
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> --- Begin Message ---
>
>
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> Subject: 
>
> Re: bug#31456: guix size tries to fetch substitute information for installed package.
>
>
>
>
> Date: 
>
> Wed, 16 May 2018 15:29:04 +0200
>
>
>
>
> User-agent: 
>
> Gnus/5.13 (Gnus v5.13) Emacs/25.3 (gnu/linux)
>
>
>
>
> Hello Martin,
>
> Martin Castillo <address@hidden> skribis:
>
> >> Exactly.  So I don’t think it’s a bug per se, just that no substitutes
> >> were unavailable when you checked.
> >
> > The documentation gives me the impression that it should work without
> > substitutes, when I have the package installed.
>
> Right, it will work out-of-the-box if you have the ungrafted version in
> the store.
>
> > I think guix size should automatically search for the grafted version,
> > unless there is a technical reason/another use-case for guix size that
> > I'm not aware of, for which it makes more sense to use the ungrafted
> > version.
>
> ‘guix size’ resorts to substitutes if it can’t find what it’s looking
> for locally.
>
> It explicitly search for the ungrafted version because substitute
> servers only have the ungrafted version, and because computing the
> derivation of the grafted version may require building the ungrafted on.
>
> > If that's the case, maybe say that in the documentation?
>
> Agreed, done in 2fd345cdfdd45dd48c9392a26793e442d680968b.
>
> Thank you!
>
> Ludo’.
>
>
> --- End Message ---