From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Subject: bug#34590: Effects of GUIX_PACKAGE_PATH and --load-path differ
Date: Wed, 06 Mar 2019 14:38:11 +0100
Message-ID: <87lg1si0n0.fsf@gnu.org>
References: <8736oivj6s.fsf@atufi.org>
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In-Reply-To: <8736oivj6s.fsf@atufi.org> (Daniel Gerber's message of "Wed, 20
	Feb 2019 11:38:19 +0100")
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To: Daniel Gerber <dg@atufi.org>
Cc: 34590@debbugs.gnu.org

Hi Daniel,

Daniel Gerber <dg@atufi.org> skribis:

> From reading the doc on `guix environment`:
>
> -L, --load-path=3DDIR    prepend DIR to the package module search path
>
> I would expect these to be exactly equivalent:
>
> $ export GUIX_PACKAGE_PATH=3D; guix environment -L path ...
> $ export GUIX_PACKAGE_PATH=3Dpath; guix environment ...
>
> Yet they differ. With libuv@1.24.0 in the guix channel (a37bdf4) and libu=
v@1.26.0 in --and also node@11.10.0 only in--=20
> /gnu/guix-local-packages/:
>
> $ export GUIX_PACKAGE_PATH=3D/gnu/guix-local-packages/; guix environment
> --no-grafts -C node@11.10.0 --ad-hoc strace gdb -- ls /gnu/store/
> |grep -o libuv-.*
> libuv-1.26.0
>
> $ export GUIX_PACKAGE_PATH=3D; guix environment -L=20
> /gnu/guix-local-packages/ --no-grafts -C node@11.10.0 --ad-hoc strace
> gdb -- ls /gnu/store/ |grep -o libuv-.*
> libuv-1.24.0
>
> Is this the intended behaviour?

Probably not.

I experimented a bit and couldn=E2=80=99t find any evidence that the search=
 path
order would differ.

However, what do /gnu/guix-local-packages/ contain?  I suppose it
provides node@11.10.0?

Then my guess is that =E2=80=9Cnode@11.10.0=E2=80=9D is ambiguous and that
=E2=80=98specification->package=E2=80=99 chooses one of the two in a non-de=
terministic
fashion.

Can you show the output of:

  guix package -A node
  guix package -A node -L /gnu/guix-local-packages
  GUIX_PACKAGE_PATH=3D/gnu/guix-local-packages guix package -A node

?

TIA,
Ludo=E2=80=99.