Figuring out how to integrate with nixos cfg.

2022-07-01 11:40:44 -07:00
parent 267efb83c8
commit e61f18116c
3 changed files with 104 additions and 25 deletions
@@ -0,0 +1,80 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+let cfg = config.fudo.wallfly;
+
+in {
+  options.fudo.wallfly = with types; {
+    enable =
+      mkEnableOption "Enable WallFly presence monitor for users on this host.";
+
+    location = mkOption {
+      type = str;
+      description = "Location (in Home Assistant) of this host.";
+      default = "unknown";
+    };
+
+    mqtt = {
+      broker-uri = mkOption {
+        type = str;
+        description = "URI of the MQTT broker.";
+        example = "tcp://my-mqtt.host:1883";
+      };
+
+      username = mkOption {
+        type = str;
+        description = "Username with which to connect to the MQTT broker.";
+        default = "wallfly";
+      };
+
+      password-file = mkOption {
+        type = str;
+        description = "Path to a file containing the MQTT user password.";
+      };
+    };
+
+    time-to-idle = mkOption {
+      type = int;
+      description =
+        "Number of seconds before considering the user idle on this host.";
+      default = "900"; # 15 minutes
+    };
+
+    delay-time = mkOption {
+      type = int;
+      description =
+        "Number of seconds to wait before polling for user activity.";
+      default = 30;
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.user.services.wallfly = {
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network-online.target" ];
+      serviceConfig = {
+        ExecStart = pkgs.writeShellScript "launch-wallfly.sh" ''
+          ${pkgs.wallfly}/bin/wallfly \
+              --location=${cfg.location} \
+              --mqtt-broker-uri=${cfg.mqtt.broker-uri} \
+              --mqtt-username=${cfg.mqtt.username} \
+              --mqtt-password-file=${cfg.mqtt.password-file} \
+              --time-to-idle=${cfg.time-to-idle} \
+              --delay-time=${cfg.delay-time}
+        '';
+        PrivateTmp = true;
+        PrivateDevices = true;
+        ProtectSystem = "strict";
+        ProtectControlGroups = true;
+        ProtectKernelTunables = true;
+        ProtectKernelModules = true;
+        ProtectHostname = true;
+        ProtectHome = true;
+        ProtectClock = true;
+        ProtectKernelLogs = true;
+        Restart = "always";
+        StandardOutput = "journal";
+      };
+    };
+  };
+}