ryan
1629c8d5d2
Systant is a userspace controller, so it makes sense to manage it
via home-manager rather than as a system service. This allows:
- Declarative per-user configuration
- Access to user's environment, PATH, and session
- Proper handling of audio, display, and other user resources
Usage in home-manager config:
imports = [ inputs.systant.homeManagerModules.default ];
services.systant.enable = true;
services.systant.settings = { ... };
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
90 lines
2.3 KiB
Nix
90 lines
2.3 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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cfg = config.services.systant;
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settingsFormat = pkgs.formats.toml { };
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configFile =
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if cfg.configFile != null
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then cfg.configFile
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else if cfg.settings != { }
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then settingsFormat.generate "systant-config.toml" cfg.settings
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else null;
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in
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{
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options.services.systant = {
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enable = lib.mkEnableOption "systant system monitoring agent";
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package = lib.mkOption {
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type = lib.types.package;
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default = pkgs.systant;
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defaultText = lib.literalExpression "pkgs.systant";
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description = "The systant package to use.";
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};
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configFile = lib.mkOption {
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type = lib.types.nullOr lib.types.path;
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default = null;
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description = ''
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Path to the systant configuration file (TOML).
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If set, this takes precedence over the settings option.
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'';
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};
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settings = lib.mkOption {
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type = settingsFormat.type;
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default = { };
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description = ''
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Configuration for systant in Nix attribute set form.
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Will be converted to TOML. Ignored if configFile is set.
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'';
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example = lib.literalExpression ''
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{
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mqtt = {
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broker = "mqtt://localhost:1883";
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topicPrefix = "systant";
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};
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entities = {
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cpu_usage = {
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type = "sensor";
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state_command = "awk '/^cpu / {u=$2+$4; t=$2+$4+$5; print int(u*100/t)}' /proc/stat";
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unit = "%";
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icon = "mdi:cpu-64-bit";
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name = "CPU Usage";
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};
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};
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homeassistant = {
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discovery = true;
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discoveryPrefix = "homeassistant";
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};
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}
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'';
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};
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};
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config = lib.mkIf cfg.enable {
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home.packages = [ cfg.package ];
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systemd.user.services.systant = {
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Unit = {
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Description = "Systant system monitoring agent";
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After = [ "network-online.target" ];
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Wants = [ "network-online.target" ];
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};
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Service = {
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Type = "simple";
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ExecStart =
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if configFile != null
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then "${cfg.package}/bin/systant run --config ${configFile}"
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else "${cfg.package}/bin/systant run";
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Restart = "on-failure";
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RestartSec = "5s";
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};
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Install = {
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WantedBy = [ "default.target" ];
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};
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};
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};
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}
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