From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: fixing --check saying outputs not valid
Date: Mon, 11 Sep 2017 14:14:29 +0200
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To: Dave Love <fx@gnu.org>
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Dave Love <fx@gnu.org> skribis:

> Ludovic Court=C3=A8s <ludo@gnu.org> writes:
>
>> To run --check, you must first already have the store item(s) available.
>>
>> So you would first run:
>>
>>   guix build hwloc
>>
>> which will ensure both hwloc and hwloc:lib are in your store, possibly
>> by downloading substitutes.
>>
>> Then you can run =E2=80=9Cguix build hwloc --check -L --no-grafts=E2=80=
=9D, which will
>> build hwloc locally and raise an error if hwloc:{out,lib} are not
>> bit-identical to what you had in store.
>
> [Should that be documented as the procedure to use?]

I think this is documented, but if you think it=E2=80=99s not or not in the
right place, please tell!

> The trouble is that I don't get a second build with --check:
>
>   $ ./pre-inst-env guix build hwloc --check -L --no-grafts
                                              ^^^^
=E2=80=9C--no-grafts=E2=80=9D is taken as an argument to =E2=80=98-L=E2=80=
=99, and thus you only rebuilt
the grafting derivation:

>   @ build-started /gnu/store/7d2lk82ak7n0awbr1k5bllwfc43dicsl-hwloc-1.11.=
8.drv - x86_64-linux /var/log/guix/drvs/7d//2lk82ak7n0awbr1k5bllwfc43dicsl-=
hwloc-1.11.8.drv.bz2
>   grafting '/gnu/store/n2l4ryq1572wnfh4yxljjbh2q40v6jr0-hwloc-1.11.8-debu=
g' -> '/gnu/store/dgfpcmkx7wzxjj3d1q6l5dmzjr9z6wz5-hwloc-1.11.8-debug'...
>   grafting '/gnu/store/hf6k2i6aqqs50p181bs1aa7xw49kd6xn-hwloc-1.11.8-lib'=
 -> '/gnu/store/jrxiynx443d894and51pa8bylaib0bkc-hwloc-1.11.8-lib'...
>   grafting '/gnu/store/f969ab3pfvgn28xc812h97jsyif2z5vs-hwloc-1.11.8' -> =
'/gnu/store/2mind69xpdx8wv6ixmjix0f12dd2qb2v-hwloc-1.11.8'...
>   /gnu/store/dgfpcmkx7wzxjj3d1q6l5dmzjr9z6wz5-hwloc-1.11.8-debug
>   /gnu/store/jrxiynx443d894and51pa8bylaib0bkc-hwloc-1.11.8-lib
>   /gnu/store/2mind69xpdx8wv6ixmjix0f12dd2qb2v-hwloc-1.11.8

Ludo=E2=80=99.