Misc updates (lockfile, zigbee2mqtt)

modules/nixos/nix/default.nix

@@ -20,7 +20,7 @@ in
     enable = mkEnableOption "manage nix configuration.";
     package = mkOption {
       type = types.package;
-      default = pkgs.nixVersions.latest;
+      default = pkgs.nixVersions.nix_2_31;
       description = "Which nix package to use.";
     };
 

modules/nixos/services/mosquitto/default.nix

@@ -15,6 +15,7 @@ in
       hass_mqtt.file = ../../../../secrets/hass_mqtt.age;
       theengs_ble_mqtt.file = ../../../../secrets/theengs_ble_mqtt.age;
       teslamate_mqtt.file = ../../../../secrets/teslamate_mqtt.age;
+      zigbee2mqtt_mqtt.file = ../../../../secrets/zigbee2mqtt_mqtt.age;
     };
 
     services.mosquitto = {
@@ -41,6 +42,13 @@ in
               acl = [ "readwrite teslamate/#" ];
               passwordFile = config.age.secrets.teslamate_mqtt.path;
             };
+            zigbee2mqtt = {
+              acl = [
+                "readwrite zigbee2mqtt/#"
+                "readwrite homeassistant/#"
+              ];
+              passwordFile = config.age.secrets.zigbee2mqtt_mqtt.path;
+            };
           };
         }
       ];

modules/nixos/services/zigbee2mqtt/default.nix

@@ -0,0 +1,75 @@
+{
+  config,
+  lib,
+  namespace,
+  ...
+}:
+let
+  cfg = config.${namespace}.services.zigbee2mqtt;
+in
+{
+  options.${namespace}.services.zigbee2mqtt = {
+    enable = lib.mkEnableOption "zigbee2mqtt";
+    acmeCertName = lib.mkOption {
+      type = lib.types.str;
+      default = "";
+      description = ''
+        If set to a non-empty string, forces SSL with the supplied acme
+        certificate.
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    age.secrets.zigbee2mqtt_creds = {
+      file = ../../../../secrets/zigbee2mqtt_creds.age;
+      path = "/var/lib/zigbee2mqtt/secret.yaml";
+      owner = "zigbee2mqtt";
+      group = "zigbee2mqtt";
+      mode = "0400";
+    };
+
+    services.zigbee2mqtt = {
+      enable = true;
+      settings = {
+        version = 4;
+        mqtt = {
+          base_topic = "zigbee2mqtt";
+          server = "mqtt://192.168.113.13:1833";
+          # TODO: Write secret.yaml file
+          user = "!secret.yaml user";
+          password = "!secret.yaml password";
+        };
+        serial = {
+          port = "tcp://192.168.113.130:6638";
+          adapter = "zstack";
+        };
+        advanced = {
+          channel = 11;
+          network_key = "GENERATE";
+          pan_id = "GENERATE";
+          ext_pan_id = "GENERATE";
+        };
+        frontend = {
+          enabled = true;
+          port = 8080;
+        };
+        homeassistant = {
+          enabled = true;
+        };
+      };
+    };
+
+    services.nginx = {
+      enable = true;
+      recommendedProxySettings = true;
+      virtualHosts."zigbee2mqtt.kilonull.com" = {
+        locations."/".proxyPass = "http://127.0.0.1:8080";
+      }
+      // lib.optionalAttrs (cfg.acmeCertName != "") {
+        forceSSL = true;
+        useACMEHost = cfg.acmeCertName;
+      };
+    };
+  };
+}