[gui] add basiscs for autostart and implement for linux

snap/snapcraft.yaml

@@ -86,6 +86,7 @@ apps:
       - network
   gui:
     desktop: usr/share/applications/multipass.gui.desktop
+    autostart: multipass.gui.autostart.desktop
     extensions: [ gnome ]
     environment: &_client-environment
       XDG_DATA_HOME: $SNAP_USER_DATA

src/client/gui/assets/multipass.gui.autostart.desktop

@@ -0,0 +1,6 @@
+[Desktop Entry]
+Name=Multipass
+Exec=multipass.gui
+Type=Application
+Terminal=false
+Categories=Utility;

src/client/gui/lib/settings/autostart_notifiers.dart

@@ -0,0 +1,67 @@
+import 'dart:async';
+import 'dart:io';
+
+import 'package:flutter/services.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+final autostartProvider =
+    AsyncNotifierProvider.autoDispose<AutostartNotifier, bool>(() {
+  if (Platform.isLinux) return LinuxAutostartNotifier();
+  if (Platform.isWindows) return WindowsAutostartNotifier();
+  if (Platform.isMacOS) return MacOSAutostartNotifier();
+  throw UnimplementedError('no autostart notifier for this platform');
+});
+
+abstract class AutostartNotifier extends AutoDisposeAsyncNotifier<bool> {
+  Future<void> set(bool value);
+}
+
+class LinuxAutostartNotifier extends AutostartNotifier {
+  static const autostartFile = 'multipass.gui.autostart.desktop';
+  final file = File(
+    '${Platform.environment['HOME']}/.config/autostart/$autostartFile',
+  );
+
+  @override
+  Future<bool> build() => file.exists();
+
+  @override
+  Future<void> set(bool value) async {
+    if (value) {
+      final data = await rootBundle.load('assets/$autostartFile');
+      await file.writeAsBytes(data.buffer.asUint8List());
+    } else {
+      if (await file.exists()) await file.delete();
+    }
+
+    ref.invalidateSelf();
+  }
+}
+
+class WindowsAutostartNotifier extends AutostartNotifier {
+  @override
+  FutureOr<bool> build() {
+    // TODO: implement build
+    throw UnimplementedError();
+  }
+
+  @override
+  Future<void> set(bool value) {
+    // TODO: implement set
+    throw UnimplementedError();
+  }
+}
+
+class MacOSAutostartNotifier extends AutostartNotifier {
+  @override
+  FutureOr<bool> build() {
+    // TODO: implement build
+    throw UnimplementedError();
+  }
+
+  @override
+  Future<void> set(bool value) {
+    // TODO: implement set
+    throw UnimplementedError();
+  }
+}

src/client/gui/lib/settings/general_settings.dart

@@ -7,6 +7,7 @@ import 'package:url_launcher/url_launcher.dart';
 import '../dropdown.dart';
 import '../providers.dart';
 import '../switch.dart';
+import 'autostart_notifiers.dart';
 
 final updateProvider = Provider.autoDispose((ref) {
   ref
@@ -25,6 +26,7 @@ class GeneralSettings extends ConsumerWidget {
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final update = ref.watch(updateProvider);
+    final autostart = ref.watch(autostartProvider).valueOrNull ?? false;
     final onAppClose = ref.watch(onAppCloseProvider);
 
     return Column(
@@ -38,10 +40,10 @@ class GeneralSettings extends ConsumerWidget {
         if (update.version.isNotBlank) UpdateAvailable(update),
         Switch(
           label: 'Open the Multipass GUI on startup',
-          value: false,
+          value: autostart,
           trailingSwitch: true,
           size: 30,
-          onChanged: (value) {},
+          onChanged: (value) => ref.read(autostartProvider.notifier).set(value),
         ),
         const SizedBox(height: 20),
         Dropdown(