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import ./make-test-python.nix ({ pkgs, ... }: {
name = "overlayfs";
meta.maintainers = with pkgs.stdenv.lib.maintainers; [ bachp ];
machine = { pkgs, ... }: {
virtualisation.emptyDiskImages = [ 512 ];
networking.hostId = "deadbeef";
environment.systemPackages = with pkgs; [ parted ];
};
testScript = ''
machine.succeed("ls /dev")
machine.succeed("mkdir -p /tmp/mnt")
# Test ext4 + overlayfs
machine.succeed(
"""
mkfs.ext4 -F -L overlay-ext4 /dev/vdb
mount -t ext4 /dev/vdb /tmp/mnt
mkdir -p /tmp/mnt/upper /tmp/mnt/lower /tmp/mnt/work /tmp/mnt/merged
# Setup some existing files
echo 'Replace' > /tmp/mnt/lower/replace.txt
echo 'Append' > /tmp/mnt/lower/append.txt
echo 'Overwrite' > /tmp/mnt/lower/overwrite.txt
mount -t overlay overlay -o lowerdir=/tmp/mnt/lower,upperdir=/tmp/mnt/upper,workdir=/tmp/mnt/work /tmp/mnt/merged
# Test new
echo 'New' > /tmp/mnt/merged/new.txt
[[ "\$(cat /tmp/mnt/merged/new.txt)" == "New" ]]
# Test replace
[[ "\$(cat /tmp/mnt/merged/replace.txt)" == "Replace" ]]
echo 'Replaced' > /tmp/mnt/merged/replace-tmp.txt
mv /tmp/mnt/merged/replace-tmp.txt /tmp/mnt/merged/replace.txt
[[ "\$(cat /tmp/mnt/merged/replace.txt)" == "Replaced" ]]
# Overwrite
[[ "\$(cat /tmp/mnt/merged/overwrite.txt)" == "Overwrite" ]]
echo 'Overwritten' > /tmp/mnt/merged/overwrite.txt
[[ "\$(cat /tmp/mnt/merged/overwrite.txt)" == "Overwritten" ]]
# Test append
[[ "\$(cat /tmp/mnt/merged/append.txt)" == "Append" ]]
echo 'ed' >> /tmp/mnt/merged/append.txt
#"cat /tmp/mnt/merged/append.txt && exit 1
[[ "\$(cat /tmp/mnt/merged/append.txt)" == "Append\ned" ]]
umount /tmp/mnt/merged
umount /tmp/mnt
udevadm settle
"""
)
'';
})
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