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nixpkgs/nixos/tests/btrbk-section-order.nix

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# This tests validates the order of generated sections that may contain
# other sections.
# When a `volume` section has both `subvolume` and `target` children,
# `target` must go before `subvolume`. Otherwise, `target` will become
# a child of the last `subvolume` instead of `volume`, due to the
# order-sensitive config format.
#
# Issue: https://github.com/NixOS/nixpkgs/issues/195660
import ./make-test-python.nix ({ lib, pkgs, ... }: {
name = "btrbk-section-order";
meta.maintainers = with lib.maintainers; [ oxalica ];
nodes.machine = { ... }: {
services.btrbk.instances.local = {
onCalendar = null;
settings = {
timestamp_format = "long";
target."ssh://global-target/".ssh_user = "root";
volume."/btrfs" = {
snapshot_dir = "/volume-snapshots";
target."ssh://volume-target/".ssh_user = "root";
subvolume."@subvolume" = {
snapshot_dir = "/subvolume-snapshots";
target."ssh://subvolume-target/".ssh_user = "root";
};
};
};
};
};
testScript = ''
machine.wait_for_unit("basic.target")
got = machine.succeed("cat /etc/btrbk/local.conf")
expect = """
backend btrfs-progs-sudo
timestamp_format long
target ssh://global-target/
ssh_user root
volume /btrfs
snapshot_dir /volume-snapshots
target ssh://volume-target/
ssh_user root
subvolume @subvolume
snapshot_dir /subvolume-snapshots
target ssh://subvolume-target/
ssh_user root
""".strip()
print(got)
assert got == expect
'';
})