feat: optiona exit code on App.quit

gjs/src/application.ts

@@ -59,6 +59,11 @@ class AstalJS extends Astal.Application {
         super.apply_css(style, reset)
     }
 
+    quit(code?: number): void {
+        super.quit()
+        exit(code ?? 0)
+    }
+
     start({ requestHandler, css, hold, main, client, ...cfg }: Config = {}) {
         client ??= () => {
             print(`Astal instance "${this.instanceName}" already running`)

lua/astal/application.lua

@@ -16,6 +16,11 @@ function AstalLua:do_request(msg, conn)
     end
 end
 
+function AstalLua:quit(code)
+    Astal.Application.quit(self)
+    os.exit(code)
+end
+
 local app = AstalLua()
 
 ---@class StartConfig

lua/test.lua

@@ -0,0 +1,8 @@
+local App = require("astal.application")
+
+App:start({
+    instance_name = "test",
+    main = function()
+        App:quit(1)
+    end,
+})

src/astal.vala

@@ -192,11 +192,11 @@ public class Application : Gtk.Application {
         }
     }
 
-    construct {
+    public new void quit() throws DBusError, IOError {
         if (instance_name == null)
             instance_name = "astal";
 
-        shutdown.connect(() => {
+        if (service != null) {
             if (FileUtils.test(socket_path, GLib.FileTest.EXISTS)){
                 try {
                     File.new_for_path(socket_path).delete(null);
@@ -204,17 +204,18 @@ public class Application : Gtk.Application {
                     warning(err.message);
                 }
             }
-        });
+        }
 
+        base.quit();
+    }
+
+    construct {
+        shutdown.connect(() => { try { quit(); } catch(Error err) {} });
         Unix.signal_add(1, () => { try { quit(); } catch(Error err) {} }, Priority.HIGH);
         Unix.signal_add(2, () => { try { quit(); } catch(Error err) {} }, Priority.HIGH);
         Unix.signal_add(15, () => { try { quit(); } catch(Error err) {} }, Priority.HIGH);
     }
 
-    public new void quit() throws DBusError, IOError {
-        base.quit();
-    }
-
     public static List<string> get_instances() {
         var list = new List<string>();
         var prefix = "io.Astal.";