tjh.dev
nixos/bcg: init module
This is gateway that transforms BigClown wireless to MQTT.
+1
nixos/modules/module-list.nix
+1
nixos/modules/module-list.nix
+175
nixos/modules/services/misc/bcg.nix
+175
nixos/modules/services/misc/bcg.nix
···
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{
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config,
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lib,
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pkgs,
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...
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}:
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with lib;
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let
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cfg = config.services.bcg;
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configFile = (pkgs.formats.yaml {}).generate "bcg.conf.yaml" (
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filterAttrsRecursive (n: v: v != null) {
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inherit (cfg) device name mqtt;
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retain_node_messages = cfg.retainNodeMessages;
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qos_node_messages = cfg.qosNodeMessages;
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base_topic_prefix = cfg.baseTopicPrefix;
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automatic_remove_kit_from_names = cfg.automaticRemoveKitFromNames;
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automatic_rename_kit_nodes = cfg.automaticRenameKitNodes;
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automatic_rename_generic_nodes = cfg.automaticRenameGenericNodes;
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automatic_rename_nodes = cfg.automaticRenameNodes;
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}
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);
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in
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{
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options = {
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services.bcg = {
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enable = mkEnableOption (mdDoc "BigClown gateway");
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package = mkOption {
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default = pkgs.python3Packages.bcg;
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defaultText = literalExpression "pkgs.python3Packages.bcg";
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description = mdDoc "Which bcg derivation to use.";
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type = types.package;
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};
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environmentFiles = mkOption {
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type = types.listOf types.path;
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default = [];
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example = [ "/run/keys/bcg.env" ];
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description = mdDoc ''
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File to load as environment file. Environment variables from this file
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will be interpolated into the config file using envsubst with this
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syntax: `$ENVIRONMENT` or `''${VARIABLE}`.
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This is useful to avoid putting secrets into the nix store.
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'';
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};
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verbose = mkOption {
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type = types.enum ["CRITICAL" "ERROR" "WARNING" "INFO" "DEBUG"];
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default = "WARNING";
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description = mdDoc "Verbosity level.";
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};
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device = mkOption {
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type = types.str;
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description = mdDoc "Device name to configure gateway to use.";
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};
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name = mkOption {
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type = with types; nullOr str;
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default = null;
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description = mdDoc ''
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Name for the device.
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Supported variables:
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* `{ip}` IP address
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* `{id}` The ID of the connected usb-dongle or core-module
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`null` can be used for automatic detection from gateway firmware.
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'';
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};
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mqtt = {
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host = mkOption {
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type = types.str;
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default = "127.0.0.1";
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description = mdDoc "Host where MQTT server is running.";
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};
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port = mkOption {
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type = types.port;
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default = 1883;
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description = mdDoc "Port of MQTT server.";
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};
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username = mkOption {
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type = with types; nullOr str;
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default = null;
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description = mdDoc "MQTT server access username.";
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};
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password = mkOption {
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type = with types; nullOr str;
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default = null;
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description = mdDoc "MQTT server access password.";
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};
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cafile = mkOption {
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type = with types; nullOr str;
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default = null;
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description = mdDoc "Certificate Authority file for MQTT server access.";
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};
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certfile = mkOption {
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type = with types; nullOr str;
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default = null;
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description = mdDoc "Certificate file for MQTT server access.";
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};
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keyfile = mkOption {
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type = with types; nullOr str;
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default = null;
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description = mdDoc "Key file for MQTT server access.";
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};
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};
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retainNodeMessages = mkOption {
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type = types.bool;
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default = false;
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description = mdDoc "Specify that node messages should be retaied in MQTT broker.";
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};
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qosNodeMessages = mkOption {
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type = types.int;
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default = 1;
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description = mdDoc "Set the guarantee of MQTT message delivery.";
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};
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baseTopicPrefix = mkOption {
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type = types.str;
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default = "";
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description = mdDoc "Topic prefix added to all MQTT messages.";
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};
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automaticRemoveKitFromNames = mkOption {
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type = types.bool;
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default = true;
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description = mdDoc "Automatically remove kits.";
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};
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automaticRenameKitNodes = mkOption {
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type = types.bool;
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default = true;
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description = mdDoc "Automatically rename kit's nodes.";
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};
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automaticRenameGenericNodes = mkOption {
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type = types.bool;
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default = true;
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description = mdDoc "Automatically rename generic nodes.";
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};
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automaticRenameNodes = mkOption {
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type = types.bool;
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default = true;
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description = mdDoc "Automatically rename all nodes.";
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};
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rename = mkOption {
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type = with types; attrsOf str;
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default = {};
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description = mdDoc "Rename nodes to different name.";
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};
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};
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};
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config = mkIf cfg.enable {
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environment.systemPackages = with pkgs; [
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python3Packages.bcg
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python3Packages.bch
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];
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systemd.services.bcg = let
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envConfig = cfg.environmentFiles != [];
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finalConfig = if envConfig
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then "$RUNTIME_DIRECTORY/bcg.config.yaml"
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else configFile;
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in {
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description = "BigClown Gateway";
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wantedBy = [ "multi-user.target" ];
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wants = mkIf config.services.mosquitto.enable [ "mosquitto.service" ];
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after = [ "network-online.target" ];
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preStart = ''
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umask 077
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${pkgs.envsubst}/bin/envsubst -i "${configFile}" -o "${finalConfig}"
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'';
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serviceConfig = {
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EnvironmentFile = cfg.environmentFiles;
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ExecStart="${cfg.package}/bin/bcg -c ${finalConfig} -v ${cfg.verbose}";
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RuntimeDirectory = "bcg";
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};
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};
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};
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}