nixos/hddfancontrol: initial module & test

1 files changed, 67 insertions, 0 deletions

diff --git a/nixos/modules/services/hardware/hddfancontrol.nix b/nixos/modules/services/hardware/hddfancontrol.nix
new file mode 100644
index 00000000000..463f63cc494
--- /dev/null
+++ b/nixos/modules/services/hardware/hddfancontrol.nix
@@ -0,0 +1,67 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.hddfancontrol;
+  types = lib.types;
+in
+
+{
+  options = {
+
+    services.hddfancontrol.enable = lib.mkEnableOption "hddfancontrol daemon";
+
+    services.hddfancontrol.disks = lib.mkOption {
+      type = with types; listOf path;
+      default = [];
+      description = lib.mdDoc ''
+        Drive(s) to get temperature from
+      '';
+      example = ["/dev/sda"];
+    };
+
+    services.hddfancontrol.pwmPaths = lib.mkOption {
+      type = with types; listOf path;
+      default = [];
+      description = lib.mdDoc ''
+        PWM filepath(s) to control fan speed (under /sys)
+      '';
+      example = ["/sys/class/hwmon/hwmon2/pwm1"];
+    };
+
+    services.hddfancontrol.smartctl = lib.mkOption {
+      type = types.bool;
+      default = false;
+      description = lib.mdDoc ''
+        Probe temperature using smartctl instead of hddtemp or hdparm
+      '';
+    };
+
+    services.hddfancontrol.extraArgs = lib.mkOption {
+      type = with types; listOf str;
+      default = [];
+      description = lib.mdDoc ''
+        Extra commandline arguments for hddfancontrol
+      '';
+      example = ["--pwm-start-value=32"
+                 "--pwm-stop-value=0"
+                 "--spin-down-time=900"];
+    };
+  };
+
+  config = lib.mkIf cfg.enable (
+    let args = lib.concatLists [
+      ["-d"] cfg.disks
+      ["-p"] cfg.pwmPaths
+      (lib.optional cfg.smartctl "--smartctl")
+      cfg.extraArgs
+    ]; in {
+      systemd.packages = [pkgs.hddfancontrol];
+
+      systemd.services.hddfancontrol = {
+        enable = true;
+        wantedBy = [ "multi-user.target" ];
+        environment.HDDFANCONTROL_ARGS = lib.escapeShellArgs args;
+      };
+    }
+  );
+}