nixpkgs/nixos/tests/predictable-interface-names.nix

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{ system ? builtins.currentSystem,
config ? {},
pkgs ? import ../.. { inherit system config; }
}:
let
inherit (import ../lib/testing-python.nix { inherit system pkgs; }) makeTest;
testCombinations = pkgs.lib.cartesianProductOfSets {
predictable = [true false];
withNetworkd = [true false];
};
in pkgs.lib.listToAttrs (builtins.map ({ predictable, withNetworkd }: {
name = pkgs.lib.optionalString (!predictable) "un" + "predictable"
+ pkgs.lib.optionalString withNetworkd "Networkd";
value = makeTest {
name = "${if predictable then "" else "un"}predictableInterfaceNames${if withNetworkd then "-with-networkd" else ""}";
meta = {};
machine = { lib, ... }: {
networking.usePredictableInterfaceNames = lib.mkForce predictable;
networking.useNetworkd = withNetworkd;
networking.dhcpcd.enable = !withNetworkd;
networking.useDHCP = !withNetworkd;
# Check if predictable interface names are working in stage-1
boot.initrd.postDeviceCommands = ''
ip link
ip link show eth0 ${if predictable then "&&" else "||"} exit 1
'';
};
testScript = ''
print(machine.succeed("ip link"))
machine.${if predictable then "fail" else "succeed"}("ip link show eth0")
'';
};
}) testCombinations)