deepcool-digital-linux: init package and module (#418236)

nixos/modules/module-list.nix

@@ -638,6 +638,7 @@
   ./services/hardware/brltty.nix
   ./services/hardware/buffyboard.nix
   ./services/hardware/ddccontrol.nix
+  ./services/hardware/deepcool-digital-linux.nix
   ./services/hardware/display.nix
   ./services/hardware/fancontrol.nix
   ./services/hardware/freefall.nix

nixos/modules/services/hardware/deepcool-digital-linux.nix

@@ -0,0 +1,47 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+let
+  cfg = config.services.hardware.deepcool-digital-linux;
+in
+{
+  meta.maintainers = [ lib.maintainers.NotAShelf ];
+
+  options.services.hardware.deepcool-digital-linux = {
+    enable = lib.mkEnableOption "DeepCool Digital monitoring daemon";
+    package = lib.mkPackageOption pkgs "deepcool-digital-linux" { };
+
+    extraArgs = lib.mkOption {
+      type = lib.types.listOf lib.types.str;
+      default = [ ];
+      example = lib.literalExpression ''
+        [
+          # Change the update interval
+          "--update 750"
+          # Enable the alarm
+          "--alarm"
+        ]
+      '';
+      description = ''
+        Extra command line arguments to be passed to the deepcool-digital-linux daemon.
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    environment.systemPackages = [ cfg.package ];
+    systemd.services.deepcool-digital-linux = {
+      description = "DeepCool Digital";
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        StateDirectory = "deepcool-digital-linux";
+        WorkingDirectory = "/var/lib/deepcool-digital-linux";
+        ExecStart = "${lib.getExe cfg.package} ${lib.escapeShellArgs cfg.extraArgs}";
+        Restart = "always";
+      };
+    };
+  };
+}

pkgs/by-name/de/deepcool-digital-linux/package.nix

@@ -0,0 +1,44 @@
+{
+  lib,
+  rustPlatform,
+  fetchFromGitHub,
+  pkg-config,
+  libudev-zero,
+  versionCheckHook,
+  nix-update-script,
+}:
+rustPlatform.buildRustPackage (finalAttrs: {
+  pname = "deepcool-digital-linux";
+  version = "0.8.3-alpha";
+
+  src = fetchFromGitHub {
+    owner = "Nortank12";
+    repo = "deepcool-digital-linux";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-Whmjd6NCOUkE7hM3FaN7grMwcC/suL7AJDVSgnZSKzM=";
+  };
+
+  cargoHash = "sha256-K1pEbUyENPUS4QK0lztWmw8ov1fGrx8KHdODmSByfek=";
+
+  buildInputs = [ libudev-zero ];
+
+  nativeBuildInputs = [
+    pkg-config
+  ];
+
+  doInstallCheck = false; # FIXME: version cmd returns 0.8.3, set to true when we switch to a stable version
+  nativeInstallCheckInputs = [ versionCheckHook ];
+  versionCheckProgramArg = "--version";
+
+  passthru.updateScript = nix-update-script { };
+
+  meta = {
+    changelog = "https://github.com/Nortank12/deepcool-digital-linux/releases/tag/v${finalAttrs.version}";
+    description = "Linux version for the DeepCool Digital Windows software";
+    homepage = "https://github.com/Nortank12/deepcool-digital-linux";
+    license = lib.licenses.gpl3Only;
+    maintainers = with lib.maintainers; [ NotAShelf ];
+    mainProgram = "deepcool-digital-linux";
+    platforms = lib.platforms.linux;
+  };
+})