Abstract daemon setup

configuration/default.nix

@@ -29,6 +29,7 @@ let
 	trackServiceMetrics = (import ./lib/track-service-metrics.nix);
 	httpHealthChecks = (import ./lib/http-health-checks.nix);
 	nginx = (import ./lib/nginx.nix);
+	daemon = (import ./lib/daemon.nix);
 in {
 	network = {
 		inherit pkgs;
@@ -123,6 +124,20 @@ in {
 					"ossworks.nl"
 				];
 			})
+			(daemon {
+				name = "mobile-proxy";
+				displayName = "Mobile Proxy";
+				fakeHome = true; # Needed for Babel
+				binaryPath = "${pkgs.cryto.mobileProxy.override { configFile = ./data/mobile-proxy/config.jsx; }}/bin/mobile-proxy";
+				environmentVariables = {};
+			})
+			(daemon {
+				name = "matrix-rooms";
+				displayName = "Matrix Room List Viewer";
+				fakeHome = true; # Needed for Babel
+				binaryPath = "${pkgs.cryto.matrixRooms}/bin/matrix-room-list-viewer";
+				environmentVariables = { NODE_ENV = "production"; };
+			})
 			(nginx {
 				"modular-matrix.cryto.net" = [
 					(nginxPresets.letsEncrypt)
@@ -209,70 +224,6 @@ in {
 			compression = "auto,zlib";
 			startAt = "daily";
 		};
-
-		users.groups.mobile-proxy = {};
-		users.users.mobile-proxy = {
-			description = "mobile-proxy Service User";
-			isSystemUser = true;
-			group = "mobile-proxy";
-		};
-
-		systemd.services.mobile-proxy = let
-			package = pkgs.cryto.mobileProxy.override { configFile = ./data/mobile-proxy/config.jsx; };
-		in {
-			description = "Mobile Proxy";
-			wantedBy = ["multi-user.target"];
-			after = ["network.target"];
-
-			serviceConfig = {
-				ExecStart = "${package}/bin/mobile-proxy";
-				User = "mobile-proxy";
-				Restart = "on-failure";
-				PermissionsStartOnly = true;
-			};
-
-			preStart = ''
-				mkdir -m 0700 -p /tmp/mobile-proxy-home
-				chown mobile-proxy /tmp/mobile-proxy-home
-			'';
-
-			environment =  {
-				HOME = "/tmp/mobile-proxy-home";
-			};
-		};
-
-		users.groups.matrix-rooms = {};
-		users.users.matrix-rooms = {
-			description = "mobile-proxy Service User";
-			isSystemUser = true;
-			group = "matrix-rooms";
-		};
-
-		systemd.services.matrix-rooms = let
-			package = pkgs.cryto.matrixRooms;
-		in {
-			description = "Matrix Room List Viewer";
-			wantedBy = ["multi-user.target"];
-			after = ["network.target"];
-
-			serviceConfig = {
-				ExecStart = "${package}/bin/matrix-room-list-viewer"; /* FIXME: Change binary name in its package.json at some point */
-				User = "matrix-rooms";
-				Restart = "on-failure";
-				PermissionsStartOnly = true;
-			};
-
-			# FIXME: Is a fake homes necessary for this application?
-			preStart = ''
-				mkdir -m 0700 -p /tmp/matrix-rooms-home
-				chown matrix-rooms /tmp/matrix-rooms-home
-			'';
-
-			environment =  {
-				HOME = "/tmp/matrix-rooms-home";
-				NODE_ENV = "production";
-			};
-		};
 	};
 
 	"machine-konjassiem-02.cryto.net" = { pkgs, lib, config, ... }@args: {

configuration/lib/daemon.nix

@@ -0,0 +1,31 @@
+{ name, displayName, fakeHome, binaryPath, environmentVariables }:
+	{ lib, ... }: {
+		users.groups.${name} = {};
+		users.users.${name} = {
+			description = "${name} Service User";
+			isSystemUser = true;
+			group = name;
+		};
+
+		systemd.services.${name} = {
+			description = displayName;
+			wantedBy = ["multi-user.target"];
+			after = ["network.target"];
+
+			serviceConfig = {
+				ExecStart = binaryPath;
+				User = name;
+				Restart = "on-failure";
+				# PermissionsStartOnly = true;
+			};
+
+			preStart = lib.mkIf fakeHome ''
+				mkdir -m 0700 -p /tmp/${name}-home
+				chown ${name} /tmp/${name}-home
+			'';
+
+			environment =  {
+				HOME = lib.mkIf fakeHome "/tmp/${name}-home";
+			} // environmentVariables;
+		};
+	}