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https://github.com/NixOS/nixpkgs.git
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37 lines
1.1 KiB
Nix
37 lines
1.1 KiB
Nix
{ lib, ... }: {
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name = "activation-etc-overlay-mutable";
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meta.maintainers = with lib.maintainers; [ nikstur ];
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nodes.machine = { pkgs, ... }: {
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system.etc.overlay.enable = true;
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system.etc.overlay.mutable = true;
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# Prerequisites
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boot.initrd.systemd.enable = true;
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boot.kernelPackages = pkgs.linuxPackages_latest;
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specialisation.new-generation.configuration = {
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environment.etc."newgen".text = "newgen";
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};
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};
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testScript = ''
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with subtest("/etc is mounted as an overlay"):
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machine.succeed("findmnt --kernel --type overlay /etc")
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with subtest("switching to the same generation"):
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machine.succeed("/run/current-system/bin/switch-to-configuration test")
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with subtest("switching to a new generation"):
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machine.fail("stat /etc/newgen")
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machine.succeed("echo -n 'mutable' > /etc/mutable")
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machine.succeed("/run/current-system/specialisation/new-generation/bin/switch-to-configuration switch")
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assert machine.succeed("cat /etc/newgen") == "newgen"
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assert machine.succeed("cat /etc/mutable") == "mutable"
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'';
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}
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