bug#36215: guix system docker-image fails when store items contain non-ascii characters

["Björn Höfling" <bjoern.hoefling@bjoernhoefling.de>]

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On Fri, 14 Jun 2019 23:05:06 +0200
Björn Höfling <bjoern.hoefling@bjoernhoefling.de> wrote:

> qemu-system-x86_64: warning: hub 0 is not connected to host network

[..]

> ERROR: In procedure lstat:
> In procedure lstat: No such file or directory:
> "/guixsd-system-root/gnu/store/6w65nzbc3ah30y5kr4zx9rcgknpjr1f5-nss-certs-3.43/etc/ssl/certs/NetLock_Arany_=Class_Gold=_F??tan??s??tv??ny:2.6.73.65.44.228.0.16.pem"
> ^MESC[Kregistering 177 items [  152.952990] Kernel panic - not
> syncing: Attempted to kill init! exitcode=0x00000100 [

I looked a bit around the code, added some debugging outputs and found
out that finally in gnu/build/vm.scm in procedure load-in-linux-vm a
QEMU VM is started where the docker image will be created in.

To test things, I entered a container with qemu-minimal:

guix environment -N -C --share=/dev/kvm --share=/tmp/.X11-unix/ --ad-hoc coreutils less findutils emacs qemu-minimal nss-certs

And started an existing VM with the store being available over virtfs:

[env] $ qemu-system-x86_64 -m 2048 -smp 2 \
		 -boot menu=on \
		 -drive file=guixsd0.2018-02-19.qcow2 \
		 -drive format=raw,file=swap.img \
		 -virtfs local,id=store_dev,path=/gnu/store,security_model=none,mount_tag=store

In that machine, I mounted the fs:

mount -t 9p -o trans=virtio store /mnt

When I then looked at /mnt/...nss-certs.../..., the non-ascii
characters are looking all good.

I think the encoding-problem is more in the script.

Björn



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