54 lines
1.2 KiB
Nix
54 lines
1.2 KiB
Nix
{
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lib,
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config,
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pkgs,
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...
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}:
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let
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var = config.clan.core.vars.generators.machine-id.files.machineId or { };
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in
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{
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options.clan.core.settings.machine-id = {
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enable = lib.mkEnableOption ''
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machine ID generation. Sets the /etc/machine-id and exposes it as a nix
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option. This unique ID that is not dependent on ephemeral or
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variable data, such as hostnames, MAC addresses or IP addresses.
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See https://www.freedesktop.org/software/systemd/man/latest/machine-id.html for details.
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'';
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};
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config = lib.mkIf (config.clan.core.settings.machine-id.enable) {
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assertions = [
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{
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assertion = lib.stringLength var.value == 32;
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message = "machine ID must be exactly 32 characters long.";
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}
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];
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boot.kernelParams = [
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''systemd.machine_id=${var.value}''
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];
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environment.etc."machine-id".text = var.value;
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clan.core.vars.generators.machine-id = {
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files.machineId.secret = false;
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runtimeInputs = [
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pkgs.coreutils
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pkgs.bash
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];
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script = ''
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uuid=$(bash ${./uuid4.sh})
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# Remove the hyphens from the UUID
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uuid_no_hyphens=$(echo -n "$uuid" | tr -d '-')
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echo -n "$uuid_no_hyphens" > "$out/machineId"
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'';
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};
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};
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}
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