Dart 3.9 / Flutter 3.35 [first LLM release] (#2714)

I got carried away with Gemini and basically rewrote CI and the release
process for the new LLM reality. This work was largely completed by
Gemini.

- Bump all SDK versions to the current beta (3.9.0-0)
- Run `flutter channel beta`
- Wrote `ci_script.dart` to replace the bash scripts
- Converted repository to pub workspace #2499 
- Added llm.md and release.md
- Added redirect for deprecated Samples Index

## Pre-launch Checklist

- [x] I read the [Flutter Style Guide] _recently_, and have followed its
advice.
- [x] I signed the [CLA].
- [x] I read the [Contributors Guide].
- [x] I have added sample code updates to the [changelog].
- [x] I updated/added relevant documentation (doc comments with `///`).

provider_shopper/lib/main.dart

@@ -25,7 +25,8 @@ const double windowWidth = 400;
 const double windowHeight = 800;
 
 void setupWindow() {
-  if (!kIsWeb && (Platform.isWindows || Platform.isLinux || Platform.isMacOS)) {
+  if (!kIsWeb &&
+      (Platform.isWindows || Platform.isLinux || Platform.isMacOS)) {
     WidgetsFlutterBinding.ensureInitialized();
     setWindowTitle('Provider Demo');
     setWindowMinSize(const Size(windowWidth, windowHeight));
@@ -46,12 +47,18 @@ GoRouter router() {
   return GoRouter(
     initialLocation: '/login',
     routes: [
-      GoRoute(path: '/login', builder: (context, state) => const MyLogin()),
+      GoRoute(
+        path: '/login',
+        builder: (context, state) => const MyLogin(),
+      ),
       GoRoute(
         path: '/catalog',
         builder: (context, state) => const MyCatalog(),
         routes: [
-          GoRoute(path: 'cart', builder: (context, state) => const MyCart()),
+          GoRoute(
+            path: 'cart',
+            builder: (context, state) => const MyCart(),
+          ),
         ],
       ),
     ],

provider_shopper/lib/models/cart.dart

@@ -24,7 +24,8 @@ class CartModel extends ChangeNotifier {
   }
 
   /// List of items in the cart.
-  List<Item> get items => _itemIds.map((id) => _catalog.getById(id)).toList();
+  List<Item> get items =>
+      _itemIds.map((id) => _catalog.getById(id)).toList();
 
   /// The current total price of all items.
   int get totalPrice =>

provider_shopper/lib/screens/cart.dart

@@ -13,7 +13,10 @@ class MyCart extends StatelessWidget {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text('Cart', style: Theme.of(context).textTheme.displayLarge),
+        title: Text(
+          'Cart',
+          style: Theme.of(context).textTheme.displayLarge,
+        ),
         backgroundColor: Colors.white,
       ),
       body: Container(
@@ -46,17 +49,16 @@ class _CartList extends StatelessWidget {
 
     return ListView.builder(
       itemCount: cart.items.length,
-      itemBuilder:
-          (context, index) => ListTile(
-            leading: const Icon(Icons.done),
-            trailing: IconButton(
-              icon: const Icon(Icons.remove_circle_outline),
-              onPressed: () {
-                cart.remove(cart.items[index]);
-              },
-            ),
-            title: Text(cart.items[index].name, style: itemNameStyle),
-          ),
+      itemBuilder: (context, index) => ListTile(
+        leading: const Icon(Icons.done),
+        trailing: IconButton(
+          icon: const Icon(Icons.remove_circle_outline),
+          onPressed: () {
+            cart.remove(cart.items[index]);
+          },
+        ),
+        title: Text(cart.items[index].name, style: itemNameStyle),
+      ),
     );
   }
 }
@@ -81,15 +83,16 @@ class _CartTotal extends StatelessWidget {
             // The important thing is that it will not rebuild
             // the rest of the widgets in this build method.
             Consumer<CartModel>(
-              builder:
-                  (context, cart, child) =>
-                      Text('\$${cart.totalPrice}', style: hugeStyle),
+              builder: (context, cart, child) =>
+                  Text('\$${cart.totalPrice}', style: hugeStyle),
             ),
             const SizedBox(width: 24),
             FilledButton(
               onPressed: () {
                 ScaffoldMessenger.of(context).showSnackBar(
-                  const SnackBar(content: Text('Buying not supported yet.')),
+                  const SnackBar(
+                    content: Text('Buying not supported yet.'),
+                  ),
                 );
               },
               style: TextButton.styleFrom(foregroundColor: Colors.white),

provider_shopper/lib/screens/catalog.dart

@@ -48,17 +48,16 @@ class _AddButton extends StatelessWidget {
     );
 
     return TextButton(
-      onPressed:
-          isInCart
-              ? null
-              : () {
-                // If the item is not in cart, we let the user add it.
-                // We are using context.read() here because the callback
-                // is executed whenever the user taps the button. In other
-                // words, it is executed outside the build method.
-                var cart = context.read<CartModel>();
-                cart.add(item);
-              },
+      onPressed: isInCart
+          ? null
+          : () {
+              // If the item is not in cart, we let the user add it.
+              // We are using context.read() here because the callback
+              // is executed whenever the user taps the button. In other
+              // words, it is executed outside the build method.
+              var cart = context.read<CartModel>();
+              cart.add(item);
+            },
       style: ButtonStyle(
         overlayColor: WidgetStateProperty.resolveWith<Color?>((states) {
           if (states.contains(WidgetState.pressed)) {
@@ -67,10 +66,9 @@ class _AddButton extends StatelessWidget {
           return null; // Defer to the widget's default.
         }),
       ),
-      child:
-          isInCart
-              ? const Icon(Icons.check, semanticLabel: 'ADDED')
-              : const Text('ADD'),
+      child: isInCart
+          ? const Icon(Icons.check, semanticLabel: 'ADDED')
+          : const Text('ADD'),
     );
   }
 }
@@ -79,7 +77,10 @@ class _MyAppBar extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return SliverAppBar(
-      title: Text('Catalog', style: Theme.of(context).textTheme.displayLarge),
+      title: Text(
+        'Catalog',
+        style: Theme.of(context).textTheme.displayLarge,
+      ),
       floating: true,
       actions: [
         IconButton(
@@ -111,7 +112,10 @@ class _MyListItem extends StatelessWidget {
         maxHeight: 48,
         child: Row(
           children: [
-            AspectRatio(aspectRatio: 1, child: Container(color: item.color)),
+            AspectRatio(
+              aspectRatio: 1,
+              child: Container(color: item.color),
+            ),
             const SizedBox(width: 24),
             Expanded(child: Text(item.name, style: textTheme)),
             const SizedBox(width: 24),

provider_shopper/lib/screens/login.dart

@@ -17,7 +17,10 @@ class MyLogin extends StatelessWidget {
           child: Column(
             mainAxisAlignment: MainAxisAlignment.center,
             children: [
-              Text('Welcome', style: Theme.of(context).textTheme.displayLarge),
+              Text(
+                'Welcome',
+                style: Theme.of(context).textTheme.displayLarge,
+              ),
               TextFormField(
                 decoration: const InputDecoration(hintText: 'Username'),
               ),
@@ -30,7 +33,9 @@ class MyLogin extends StatelessWidget {
                 onPressed: () {
                   context.pushReplacement('/catalog');
                 },
-                style: ElevatedButton.styleFrom(backgroundColor: Colors.yellow),
+                style: ElevatedButton.styleFrom(
+                  backgroundColor: Colors.yellow,
+                ),
                 child: const Text('ENTER'),
               ),
             ],

provider_shopper/pubspec.yaml

@@ -1,16 +1,16 @@
 name: provider_shopper
 description: A shopping app sample that uses Provider for state management.
 publish_to: none
-
 version: 1.0.0+1
+resolution: workspace
 
 environment:
-  sdk: ^3.7.0-0
+  sdk: ^3.9.0-0
 
 dependencies:
   flutter:
     sdk: flutter
-  go_router: ^16.1.0
+  go_router: ^16.0.0
   provider: ^6.0.2
   window_size:
     git:
@@ -22,7 +22,6 @@ dev_dependencies:
     path: ../analysis_defaults
   flutter_test:
     sdk: flutter
-
 flutter:
   uses-material-design: true