dyn-gandi/nix/module.nix

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Nix
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inputs: {
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config,
lib,
pkgs,
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system,
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...
}: let
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cfg = config.dyn-gandi;
package = inputs.self.packages.${pkgs.stdenv.hostPlatform.system}.default;
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inherit (lib) mkIf mkEnableOption mkOption types;
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format = pkgs.formats.json {};
configFile = format.generate "config.json" cfg.settings;
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in {
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options.dyn-gandi = {
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enable = mkEnableOption "dyn-gandi";
timer = lib.mkOption {
type = types.nullOr types.int;
default = null;
description = lib.mdDoc ''
The time intervall in seconds the script should be repeated.
'';
};
settings = mkOption {
type = with types; let
valueType = nullOr (oneOf [
# TODO: restrict type to actual config file structure
bool
int
float
str
path
(attrsOf valueType)
(listOf valueType)
]);
in
valueType;
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default = throw "Please specify dyn-gandi.settings";
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};
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};
config = mkIf cfg.enable {
environment.systemPackages = [package];
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systemd.services.dyn-gandi = mkIf (cfg.timer
!= null) {
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script = "${package}/bin/dyn-gandi --config ${configFile}";
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serviceConfig = {
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Type = "oneshot";
};
};
systemd.timers.dyn-gandi = mkIf (cfg.timer
!= null) {
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wantedBy = ["timers.target"];
timerConfig = {
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OnBootSec = "0s";
OnUnitActiveSec = "${toString cfg.timer}s";
Unit = "dyn-gandi.service";
};
};
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};
}