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