GNU logs - #68797, boring messages

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Subject: bug#68797: Channel dependencies should be propagated
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From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludovic.courtes@HIDDEN>
Date: Mon, 29 Jan 2024 16:01:14 +0100
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Hello!

With channels flourishing, we found a bug that=E2=80=99s always been there.

When channel C depends on B, which depends on A, in general you need
both A and B to be present in the build environment of C (the derivation
that compiles C when you run =E2=80=98pull=E2=80=99 or =E2=80=98time-machin=
e=E2=80=99) because
potentially B is going to load modules from A.

However, currently only B is present in C=E2=80=99s environment.

To illustrate that, the script below creates three such channels.
Right now it fails like this:

--8<---------------cut here---------------start------------->8---
building /gnu/store/2pnfkl9l6lsndsgk4qg7rq4wjh2iisj0-my-channel-c.drv...
|builder for `/gnu/store/2pnfkl9l6lsndsgk4qg7rq4wjh2iisj0-my-channel-c.drv'=
 failed to produce output path `/gnu/store/lix9sz9g2x2ixr3dsyrbnxhxfcqn41l7=
-my-channel-c'
build of /gnu/store/2pnfkl9l6lsndsgk4qg7rq4wjh2iisj0-my-channel-c.drv failed
View build log at '/var/log/guix/drvs/2p/nfkl9l6lsndsgk4qg7rq4wjh2iisj0-my-=
channel-c.drv.gz'.
cannot build derivation `/gnu/store/alh2yy1258206zki24z9nzi1zwrggd4d-profil=
e.drv': 1 dependencies couldn't be built
guix time-machine: error: build of `/gnu/store/alh2yy1258206zki24z9nzi1zwrg=
gd4d-profile.drv' failed
$ zcat /var/log/guix/drvs/2p/nfkl9l6lsndsgk4qg7rq4wjh2iisj0-my-channel-c.dr=
v.gz
(repl-version 0 1 1)
(exception misc-error (value #f) (value "no code for module ~S") (value ((m=
y-channel-a))) (value #f))
--8<---------------cut here---------------end--------------->8---

Here=E2=80=99s the script:

--8<---------------cut here---------------start------------->8---
#!/bin/sh

set -ex

mkdir a
echo '(define-module (my-channel-a))' > a/my-channel-a.scm
(cd a; git init; git add .; git commit -m init)

mkdir b
cat > b/my-channel-b.scm <<EOF
(define-module (my-channel-b)
  #:use-module (my-channel-a))
EOF
cat > b/.guix-channel <<EOF
(channel
  (version 0)
  (dependencies
   (channel (name my-channel-a) (url "$PWD/a"))))
EOF
(cd b; git init; git add .; git commit -m init)

mkdir c
cat > c/my-channel-c.scm <<EOF
(define-module (my-channel-c)
  #:use-module (my-channel-b))
EOF
cat > c/.guix-channel <<EOF
(channel
  (version 0)
  (dependencies
   (channel (name my-channel-b) (url "$PWD/b"))))
EOF
(cd c; git init; git add .; git commit -m init)

cat > "channels.scm" <<EOF
(list (channel
        (name 'guix)
        (url "https://git.savannah.gnu.org/git/guix.git")
        (commit
          "65dc2d40cb113382fb98796f1d04099f28cab355")
        (introduction
          (make-channel-introduction
            "9edb3f66fd807b096b48283debdcddccfea34bad"
            (openpgp-fingerprint
              "BBB0 2DDF 2CEA F6A8 0D1D  E643 A2A0 6DF2 A33A 54FA"))))
      (channel
        (name 'my-channel-c)
        (url "$PWD/c")))
EOF

exec guix time-machine -C channels.scm -- describe
--8<---------------cut here---------------end--------------->8---

Ludo=E2=80=99.

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludovic.courtes@HIDDEN>
Subject: bug#68797: Acknowledgement (Channel dependencies should be
 propagated)
Message-ID: <handler.68797.B.17065404974332.ack <at> debbugs.gnu.org>
References: <878r48p4jp.fsf@HIDDEN>
X-Gnu-PR-Message: ack 68797
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Reply-To: 68797 <at> debbugs.gnu.org
Date: Mon, 29 Jan 2024 15:02:02 +0000

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68797: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D68797
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severity 68797 important
quit

Last modified: Tue, 30 Jan 2024 17:30:02 UTC

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