scrutiny-collector: add module

modules/module-list.nix

@@ -72,6 +72,7 @@
   ./services/postgresql
   ./services/privoxy
   ./services/redis
+  ./services/scrutiny-collector.nix
   ./services/sketchybar
   ./services/skhd
   ./services/spacebar

modules/services/scrutiny-collector.nix

@@ -0,0 +1,132 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib) mkEnableOption mkIf mkOption mkPackageOption types mdDoc;
+
+  cfg = config.services.scrutiny-collector;
+in
+{
+  meta.maintainers = [ lib.maintainers.dudeofawesome or "dudeofawesome" ];
+
+  options.services.scrutiny-collector = {
+    enable = mkEnableOption (mdDoc "scrutiny-collector");
+
+    package = mkPackageOption pkgs "scrutiny-collector" { };
+
+    config-path = mkOption {
+      type = types.nullOr types.path;
+      default = null;
+      description = mdDoc ''
+        Specify the path to the devices file
+      '';
+    };
+
+    configuration = mkOption {
+      type = types.nullOr (pkgs.formats.yaml { }).type;
+      default = null;
+      description = lib.mdDoc ''
+        Specify the configuration for the Scrutiny collector in Nix.
+      '';
+    };
+
+    api-endpoint = mkOption {
+      type = types.str;
+      default = "http://localhost:8080";
+      description = mdDoc ''
+        The api server endpoint
+      '';
+    };
+
+    log-file = mkOption {
+      type = types.nullOr types.path;
+      default = null;
+      description = mdDoc ''
+        Path to file for logging. Leave empty to use STDOUT
+      '';
+    };
+
+    debug = mkEnableOption "debug logging";
+
+    host-id = mkOption {
+      type = types.str;
+      default = config.networking.hostName;
+      defaultText = lib.literalExpression "config.networking.hostName";
+      description = mdDoc ''
+        Host identifier/label, used for grouping devices
+      '';
+    };
+
+    # TODO: this needs to be a list of calendar attrs
+    calendar = mkOption {
+      type = types.str;
+      default = "*-*-* 00:00:00";
+      description = mdDoc ''
+        Configured when to run the service systemd unit (DayOfWeek Year-Month-Day Hour:Minute:Second).
+      '';
+    };
+
+    # TODO: is this relevant?
+    user = mkOption {
+      type = types.str;
+      default = "scrutiny-collector";
+      description = mdDoc ''
+        User under which the scrutiny collector service runs.
+      '';
+    };
+
+    # TODO: is this relevant?
+    group = mkOption {
+      type = types.str;
+      default = "scrutiny-collector";
+      description = mdDoc ''
+        Group under which the scrutiny collector service runs.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable (
+    let
+      configFile =
+        if cfg.configuration != null then
+          (pkgs.writeTextFile {
+            name = "collector.yaml";
+            text = (lib.generators.toYAML { } cfg.configuration);
+          })
+        else null;
+      createUser = cfg.user == "scrutiny-collector";
+    in
+    {
+      environment.systemPackages = [ cfg.package ];
+
+      launchd.daemons.scrutiny-collector =
+        let
+          args = lib.pipe
+            {
+              inherit (cfg) api-endpoint log-file debug host-id;
+              config = if cfg.config-path != null then cfg.config-path else configFile;
+            }
+            [
+              (lib.filterAttrs (arg: value: value != null && value != false))
+              (lib.mapAttrs' (arg: value: {
+                name = "${if builtins.stringLength arg > 1 then "--" else "-"}${arg}";
+                inherit value;
+              }))
+              (lib.mapAttrsToList (arg: value: [ arg ] ++ (if value != true then [ value ] else [ ])))
+              (lib.flatten)
+            ];
+        in
+        {
+          serviceConfig = {
+            ProgramArguments = [
+              "${cfg.package}/bin/collector-metrics"
+              "run"
+            ] ++ args;
+
+            StartCalendarInterval = [
+              { Hour = 00; Minute = 00; }
+            ];
+          };
+        };
+    }
+  );
+}