[various] Fixes unawaited_futures violations (#4067)

This option had been disabled to match flutter/flutter, but the reason it was disabled there was "too many false positives", mostly around animation. That doesn't apply to most packages here, and we've had a number of production bugsâespecially in plugins, that use async heavily in ways that are intended to be client-awaitableâthat this would have caught. This PR: - Enables the option at the repo level. - Permanently (unless the owners decide to change it) opts out `animations` and `go_router`, both of which looked like mostly or entirely false positives. - Temporarily opted out a few plugins that have a lot of violations that should be handled in their own PRs later (`camera_android_camerax`, most of `webview_flutter`). - Fixes all remaining violations. In many cases this PR is behavior-changing, replacing implicitly unawaited futures that did not seem obviously intentional with `await`ed futures, so non-test code in particular should be reviewed carefully to make sure the changes are correct. All of the changes are manual, not `fix`-generated. Part of https://github.com/flutter/flutter/issues/127323
2025-07-15 02:03:19 +08:00 · 2023-05-24 08:39:26 -07:00
parent f19282ab42
commit 97e3ba64d7
78 changed files with 266 additions and 143 deletions
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@ -183,7 +183,7 @@ linter:
    - tighten_type_of_initializing_formals
    # - type_annotate_public_apis # subset of always_specify_types
    - type_init_formals
-    # - unawaited_futures # too many false positives, especially with the way AnimationController works
+    - unawaited_futures # DIFFERENT FROM FLUTTER/FLUTTER: It's disabled there for "too many false positives"; that's not an issue here, and missing awaits have caused production issues in plugins.
    - unnecessary_await_in_return
    - unnecessary_brace_in_string_interps
    - unnecessary_const
--- a/packages/animations/analysis_options.yaml
+++ b/packages/animations/analysis_options.yaml
@ -0,0 +1,10 @@
+# This custom rule set only exists to allow opting out of the repository
+# default of enabling unawaited_futures. Please do NOT add more changes
+# here without consulting with #hackers-ecosystem on Discord.
+
+include: ../../analysis_options.yaml
+
+linter:
+  rules:
+    # Matches flutter/flutter, which disables this rule due to false positives.
+    unawaited_futures: false
--- a/packages/camera/camera/CHANGELOG.md
+++ b/packages/camera/camera/CHANGELOG.md
@ -1,3 +1,7 @@
+## 0.10.5+2
+
+* Fixes unawaited_futures violations.
+
 ## 0.10.5+1

 * Removes obsolete null checks on non-nullable values.
--- a/packages/camera/camera/lib/src/camera_controller.dart
+++ b/packages/camera/camera/lib/src/camera_controller.dart
@ -552,7 +552,7 @@ class CameraController extends ValueNotifier<CameraValue> {
    }

    if (value.isStreamingImages) {
-      stopImageStream();
+      await stopImageStream();
    }

    try {
--- a/packages/camera/camera/pubspec.yaml
+++ b/packages/camera/camera/pubspec.yaml
@ -4,7 +4,7 @@ description: A Flutter plugin for controlling the camera. Supports previewing
  Dart.
 repository: https://github.com/flutter/packages/tree/main/packages/camera/camera
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+camera%22
-version: 0.10.5+1
+version: 0.10.5+2

 environment:
  sdk: ">=2.18.0 <4.0.0"
--- a/packages/camera/camera/test/camera_image_stream_test.dart
+++ b/packages/camera/camera/test/camera_image_stream_test.dart
@ -174,7 +174,7 @@ void main() {

    await cameraController.initialize();

-    cameraController.startVideoRecording(
+    await cameraController.startVideoRecording(
        onAvailable: (CameraImage image) => null);

    expect(
@ -192,7 +192,7 @@ void main() {

    await cameraController.initialize();

-    cameraController.startVideoRecording();
+    await cameraController.startVideoRecording();

    expect(mockPlatform.streamCallLog.contains('startVideoCapturing'), isTrue);
  });
--- a/packages/camera/camera_android/CHANGELOG.md
+++ b/packages/camera/camera_android/CHANGELOG.md
@ -1,3 +1,7 @@
+## NEXT
+
+* Fixes unawaited_futures violations.
+
 ## 0.10.8+2

 * Removes obsolete null checks on non-nullable values.
--- a/packages/camera/camera_android/example/lib/camera_controller.dart
+++ b/packages/camera/camera_android/example/lib/camera_controller.dart
@ -229,12 +229,12 @@ class CameraController extends ValueNotifier<CameraValue> {
      enableAudio: enableAudio,
    );

-    CameraPlatform.instance
+    unawaited(CameraPlatform.instance
        .onCameraInitialized(_cameraId)
        .first
        .then((CameraInitializedEvent event) {
      initializeCompleter.complete(event);
-    });
+    }));

    await CameraPlatform.instance.initializeCamera(
      _cameraId,
@ -444,8 +444,8 @@ class CameraController extends ValueNotifier<CameraValue> {
    if (_isDisposed) {
      return;
    }
-    _deviceOrientationSubscription?.cancel();
    _isDisposed = true;
+    await _deviceOrientationSubscription?.cancel();
    super.dispose();
    if (_initCalled != null) {
      await _initCalled;
--- a/packages/camera/camera_android/test/android_camera_test.dart
+++ b/packages/camera/camera_android/test/android_camera_test.dart
@ -1119,7 +1119,7 @@ void main() {
        isMethodCall('startImageStream', arguments: null),
      ]);

-      subscription.cancel();
+      await subscription.cancel();
    });

    test('Should stop streaming', () async {
@ -1136,7 +1136,7 @@ void main() {
      final StreamSubscription<CameraImageData> subscription = camera
          .onStreamedFrameAvailable(cameraId)
          .listen((CameraImageData imageData) {});
-      subscription.cancel();
+      await subscription.cancel();

      // Assert
      expect(channel.log, <Matcher>[
--- a/packages/camera/camera_android_camerax/analysis_options.yaml
+++ b/packages/camera/camera_android_camerax/analysis_options.yaml
@ -0,0 +1,8 @@
+# TODO(stuartmorgan): Remove this file and fix all the unawaited_futures
+# violations. See https://github.com/flutter/flutter/issues/127323
+
+include: ../../../analysis_options.yaml
+
+linter:
+  rules:
+    unawaited_futures: false
--- a/packages/camera/camera_avfoundation/CHANGELOG.md
+++ b/packages/camera/camera_avfoundation/CHANGELOG.md
@ -1,3 +1,7 @@
+## NEXT
+
+* Fixes unawaited_futures violations.
+
 ## 0.9.13+2

 * Removes obsolete null checks on non-nullable values.
--- a/packages/camera/camera_avfoundation/example/lib/camera_controller.dart
+++ b/packages/camera/camera_avfoundation/example/lib/camera_controller.dart
@ -229,12 +229,12 @@ class CameraController extends ValueNotifier<CameraValue> {
      enableAudio: enableAudio,
    );

-    CameraPlatform.instance
+    unawaited(CameraPlatform.instance
        .onCameraInitialized(_cameraId)
        .first
        .then((CameraInitializedEvent event) {
      initializeCompleter.complete(event);
-    });
+    }));

    await CameraPlatform.instance.initializeCamera(
      _cameraId,
@ -443,8 +443,8 @@ class CameraController extends ValueNotifier<CameraValue> {
    if (_isDisposed) {
      return;
    }
-    _deviceOrientationSubscription?.cancel();
    _isDisposed = true;
+    await _deviceOrientationSubscription?.cancel();
    super.dispose();
    if (_initCalled != null) {
      await _initCalled;
--- a/packages/camera/camera_avfoundation/test/avfoundation_camera_test.dart
+++ b/packages/camera/camera_avfoundation/test/avfoundation_camera_test.dart
@ -1120,7 +1120,7 @@ void main() {
        isMethodCall('startImageStream', arguments: null),
      ]);

-      subscription.cancel();
+      await subscription.cancel();
    });

    test('Should stop streaming', () async {
@ -1137,7 +1137,7 @@ void main() {
      final StreamSubscription<CameraImageData> subscription = camera
          .onStreamedFrameAvailable(cameraId)
          .listen((CameraImageData imageData) {});
-      subscription.cancel();
+      await subscription.cancel();

      // Assert
      expect(channel.log, <Matcher>[
--- a/packages/camera/camera_platform_interface/test/method_channel/method_channel_camera_test.dart
+++ b/packages/camera/camera_platform_interface/test/method_channel/method_channel_camera_test.dart
@ -1085,7 +1085,7 @@ void main() {
          isMethodCall('startImageStream', arguments: null),
        ]);

-        subscription.cancel();
+        await subscription.cancel();
      });

      test('Should stop streaming', () async {
@ -1102,7 +1102,7 @@ void main() {
        final StreamSubscription<CameraImageData> subscription = camera
            .onStreamedFrameAvailable(cameraId)
            .listen((CameraImageData imageData) {});
-        subscription.cancel();
+        await subscription.cancel();

        // Assert
        expect(channel.log, <Matcher>[
--- a/packages/camera/camera_windows/CHANGELOG.md
+++ b/packages/camera/camera_windows/CHANGELOG.md
@ -1,5 +1,6 @@
-## NEXT
+## 0.2.1+7

+* Fixes unawaited_futures violations.
 * Updates minimum supported SDK version to Flutter 3.3/Dart 2.18.

 ## 0.2.1+6
--- a/packages/camera/camera_windows/example/lib/main.dart
+++ b/packages/camera/camera_windows/example/lib/main.dart
@ -99,12 +99,12 @@ class _MyAppState extends State<MyApp> {
        enableAudio: _recordAudio,
      );

-      _errorStreamSubscription?.cancel();
+      unawaited(_errorStreamSubscription?.cancel());
      _errorStreamSubscription = CameraPlatform.instance
          .onCameraError(cameraId)
          .listen(_onCameraError);

-      _cameraClosingStreamSubscription?.cancel();
+      unawaited(_cameraClosingStreamSubscription?.cancel());
      _cameraClosingStreamSubscription = CameraPlatform.instance
          .onCameraClosing(cameraId)
          .listen(_onCameraClosing);
@ -193,7 +193,7 @@ class _MyAppState extends State<MyApp> {

  Future<void> _recordTimed(int seconds) async {
    if (_initialized && _cameraId > 0 && !_recordingTimed) {
-      CameraPlatform.instance
+      unawaited(CameraPlatform.instance
          .onVideoRecordedEvent(_cameraId)
          .first
          .then((VideoRecordedEvent event) async {
@ -204,7 +204,7 @@ class _MyAppState extends State<MyApp> {

          _showInSnackBar('Video captured to: ${event.file.path}');
        }
-      });
+      }));

      await CameraPlatform.instance.startVideoRecording(
        _cameraId,
--- a/packages/camera/camera_windows/pubspec.yaml
+++ b/packages/camera/camera_windows/pubspec.yaml
@ -2,7 +2,7 @@ name: camera_windows
 description: A Flutter plugin for getting information about and controlling the camera on Windows.
 repository: https://github.com/flutter/packages/tree/main/packages/camera/camera_windows
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+camera%22
-version: 0.2.1+6
+version: 0.2.1+7

 environment:
  sdk: ">=2.18.0 <4.0.0"
--- a/packages/cross_file/tool/run_tests.dart
+++ b/packages/cross_file/tool/run_tests.dart
@ -8,6 +8,7 @@
 //
 // usage: dart run tool/run_tests.dart
 // (needs a `chrome` executable in $PATH, or a tweak to dart_test.yaml)
+import 'dart:async';
 import 'dart:io';
 import 'package:path/path.dart' as p;

@ -30,8 +31,8 @@ Future<void> main(List<String> args) async {

 Future<Process> _streamOutput(Future<Process> processFuture) async {
  final Process process = await processFuture;
-  stdout.addStream(process.stdout);
-  stderr.addStream(process.stderr);
+  unawaited(stdout.addStream(process.stdout));
+  unawaited(stderr.addStream(process.stderr));
  return process;
 }

--- a/packages/flutter_image/CHANGELOG.md
+++ b/packages/flutter_image/CHANGELOG.md
@ -1,5 +1,6 @@
-## NEXT
+## 4.1.6

+* Fixes unawaited_futures violations.
 * Updates minimum supported SDK version to Flutter 3.3/Dart 2.18.
 * Aligns Dart and Flutter SDK constraints.

--- a/packages/flutter_image/lib/network.dart
+++ b/packages/flutter_image/lib/network.dart
@ -191,7 +191,7 @@ class NetworkImageWithRetry extends ImageProvider<NetworkImageWithRetry> {
          scale: key.scale,
        );
      } catch (error) {
-        request?.close();
+        await request?.close();
        lastFailure = error is FetchFailure
            ? error
            : FetchFailure._(
--- a/packages/flutter_image/pubspec.yaml
+++ b/packages/flutter_image/pubspec.yaml
@ -3,7 +3,7 @@ description: >
  Image utilities for Flutter: improved network providers, effects, etc.
 repository: https://github.com/flutter/packages/tree/main/packages/flutter_image
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+flutter_image%22
-version: 4.1.5
+version: 4.1.6

 environment:
  sdk: ">=2.18.0 <4.0.0"
--- a/packages/flutter_markdown/CHANGELOG.md
+++ b/packages/flutter_markdown/CHANGELOG.md
@ -1,5 +1,6 @@
 ## NEXT

+* Fixes unawaited_futures violations.
 * Updates minimum Flutter version to 3.3.
 * Aligns Dart and Flutter SDK constraints.
 * Replace `describeEnum` with the `name` getter.
--- a/packages/flutter_markdown/example/lib/demos/basic_markdown_demo.dart
+++ b/packages/flutter_markdown/example/lib/demos/basic_markdown_demo.dart
@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

+import 'dart:async';
+
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_markdown/flutter_markdown.dart';
@ -125,11 +127,11 @@ class _BasicMarkdownDemoState extends State<BasicMarkdownDemo> {
    String? href,
    String title,
  ) async {
-    showDialog<Widget>(
+    unawaited(showDialog<Widget>(
      context: context,
      builder: (BuildContext context) =>
          _createDialog(context, text, href, title),
-    );
+    ));
  }

  Widget _createDialog(
--- a/packages/flutter_markdown/example/lib/screens/demo_screen.dart
+++ b/packages/flutter_markdown/example/lib/screens/demo_screen.dart
@ -109,7 +109,7 @@ class DemoNotesView extends StatelessWidget {
    String? href,
    String title,
  ) async {
-    showDialog<Widget>(
+    await showDialog<Widget>(
      context: context,
      builder: (BuildContext context) =>
          _createDialog(context, text, href, title),
--- a/packages/go_router/analysis_options.yaml
+++ b/packages/go_router/analysis_options.yaml
@ -1,5 +1,11 @@
+# This custom rule set only exists to allow very targeted changes
+# relative to the default repo settings, for specific use cases.
+# Please do NOT add more changes here without consulting with
+# #hackers-ecosystem on Discord.
+
 include: ../../analysis_options.yaml

 analyzer:
  exclude:
+    # This directory deliberately has errors, to test `fix`.
    - "test_fixes/**"
--- a/packages/go_router/test/analysis_options.yaml
+++ b/packages/go_router/test/analysis_options.yaml
@ -0,0 +1,12 @@
+# This custom rule set only exists to allow very targeted changes
+# relative to the default repo settings, for specific use cases.
+# Please do NOT add more changes here without consulting with
+# #hackers-ecosystem on Discord.
+
+include: ../../../analysis_options.yaml
+
+linter:
+  rules:
+    # Matches flutter/flutter, which disables this rule due to false positives
+    # from navigator APIs.
+    unawaited_futures: false
--- a/packages/go_router/test/go_router_test.dart
+++ b/packages/go_router/test/go_router_test.dart
@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

-// ignore_for_file: cascade_invocations, diagnostic_describe_all_properties
+// ignore_for_file: cascade_invocations, diagnostic_describe_all_properties, unawaited_futures

 import 'dart:async';

--- a/packages/go_router/tool/run_tests.dart
+++ b/packages/go_router/tool/run_tests.dart
@ -8,6 +8,7 @@

 // ignore_for_file: avoid_print

+import 'dart:async';
 import 'dart:io';
 import 'package:io/io.dart' as io;
 import 'package:path/path.dart' as p;
@ -99,8 +100,8 @@ dependencies:

 Future<Process> _streamOutput(Future<Process> processFuture) async {
  final Process process = await processFuture;
-  stdout.addStream(process.stdout);
-  stderr.addStream(process.stderr);
+  unawaited(stdout.addStream(process.stdout));
+  unawaited(stderr.addStream(process.stderr));
  return process;
 }

--- a/packages/go_router_builder/CHANGELOG.md
+++ b/packages/go_router_builder/CHANGELOG.md
@ -1,5 +1,6 @@
-## NEXT
+## 2.0.2

+* Fixes unawaited_futures violations.
 * Updates minimum supported SDK version to Flutter 3.3/Dart 2.18.

 ## 2.0.1
--- a/packages/go_router_builder/example/lib/main.dart
+++ b/packages/go_router_builder/example/lib/main.dart
@ -4,6 +4,8 @@

 // ignore_for_file: public_member_api_docs

+import 'dart:async';
+
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 import 'package:provider/provider.dart';
@ -185,7 +187,7 @@ class HomeScreen extends StatelessWidget {
                  value: '2',
                  child: const Text('Push w/ return value'),
                  onTap: () async {
-                    FamilyCountRoute(familyData.length)
+                    unawaited(FamilyCountRoute(familyData.length)
                        .push<int>(context)
                        .then((int? value) {
                      if (value != null) {
@ -195,7 +197,7 @@ class HomeScreen extends StatelessWidget {
                          ),
                        );
                      }
-                    });
+                    }));
                  },
                ),
                PopupMenuItem<String>(
--- a/packages/go_router_builder/pubspec.yaml
+++ b/packages/go_router_builder/pubspec.yaml
@ -2,7 +2,7 @@ name: go_router_builder
 description: >-
  A builder that supports generated strongly-typed route helpers for
  package:go_router
-version: 2.0.1
+version: 2.0.2
 repository: https://github.com/flutter/packages/tree/main/packages/go_router_builder
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+go_router_builder%22

--- a/packages/google_identity_services_web/test/js_loader_test.dart
+++ b/packages/google_identity_services_web/test/js_loader_test.dart
@ -4,6 +4,8 @@

@TestOn('browser') // Uses package:js

+import 'dart:async';
+
 import 'package:google_identity_services_web/loader.dart';
 import 'package:google_identity_services_web/src/js_interop/dom.dart' as dom;
 import 'package:google_identity_services_web/src/js_loader.dart';
@ -27,7 +29,9 @@ void main() {
    final dom.DomHtmlElement target = dom.document.createElement('div');

    test('Injects script into desired target', () async {
-      loadWebSdk(target: target);
+      // This test doesn't simulate the callback that completes the future, and
+      // the code being tested runs synchronously.
+      unawaited(loadWebSdk(target: target));

      // Target now should have a child that is a script element
      final Object children = js_util.getProperty<Object>(target, 'children');
--- a/packages/google_identity_services_web/tool/run_tests.dart
+++ b/packages/google_identity_services_web/tool/run_tests.dart
@ -8,6 +8,7 @@
 //
 // usage: dart run tool/run_tests.dart
 // (needs a `chrome` executable in $PATH, or a tweak to dart_test.yaml)
+import 'dart:async';
 import 'dart:io';
 import 'package:path/path.dart' as p;

@ -30,8 +31,8 @@ Future<void> main(List<String> args) async {

 Future<Process> _streamOutput(Future<Process> processFuture) async {
  final Process process = await processFuture;
-  stdout.addStream(process.stdout);
-  stderr.addStream(process.stderr);
+  unawaited(stdout.addStream(process.stdout));
+  unawaited(stderr.addStream(process.stderr));
  return process;
 }

--- a/packages/google_maps_flutter/google_maps_flutter/CHANGELOG.md
+++ b/packages/google_maps_flutter/google_maps_flutter/CHANGELOG.md
@ -1,3 +1,7 @@
+## 2.2.8
+
+* Fixes unawaited_futures violations.
+
 ## 2.2.7

 * Removes obsolete null checks on non-nullable values.
--- a/packages/google_maps_flutter/google_maps_flutter/README.md
+++ b/packages/google_maps_flutter/google_maps_flutter/README.md
@ -154,7 +154,7 @@ class MapSampleState extends State<MapSample> {

  Future<void> _goToTheLake() async {
    final GoogleMapController controller = await _controller.future;
-    controller.animateCamera(CameraUpdate.newCameraPosition(_kLake));
+    await controller.animateCamera(CameraUpdate.newCameraPosition(_kLake));
  }
 }
 ```
--- a/packages/google_maps_flutter/google_maps_flutter/example/lib/readme_sample.dart
+++ b/packages/google_maps_flutter/google_maps_flutter/example/lib/readme_sample.dart
@ -66,7 +66,7 @@ class MapSampleState extends State<MapSample> {

  Future<void> _goToTheLake() async {
    final GoogleMapController controller = await _controller.future;
-    controller.animateCamera(CameraUpdate.newCameraPosition(_kLake));
+    await controller.animateCamera(CameraUpdate.newCameraPosition(_kLake));
  }
 }
 // #enddocregion MapSample
--- a/packages/google_maps_flutter/google_maps_flutter/lib/src/google_map.dart
+++ b/packages/google_maps_flutter/google_maps_flutter/lib/src/google_map.dart
@ -360,47 +360,41 @@ class _GoogleMapState extends State<GoogleMap> {
      return;
    }
    final GoogleMapController controller = await _controller.future;
-    // ignore: unawaited_futures
-    controller._updateMapConfiguration(updates);
+    await controller._updateMapConfiguration(updates);
    _mapConfiguration = newConfig;
  }

  Future<void> _updateMarkers() async {
    final GoogleMapController controller = await _controller.future;
-    // ignore: unawaited_futures
-    controller._updateMarkers(
+    await controller._updateMarkers(
        MarkerUpdates.from(_markers.values.toSet(), widget.markers));
    _markers = keyByMarkerId(widget.markers);
  }

  Future<void> _updatePolygons() async {
    final GoogleMapController controller = await _controller.future;
-    // ignore: unawaited_futures
-    controller._updatePolygons(
+    await controller._updatePolygons(
        PolygonUpdates.from(_polygons.values.toSet(), widget.polygons));
    _polygons = keyByPolygonId(widget.polygons);
  }

  Future<void> _updatePolylines() async {
    final GoogleMapController controller = await _controller.future;
-    // ignore: unawaited_futures
-    controller._updatePolylines(
+    await controller._updatePolylines(
        PolylineUpdates.from(_polylines.values.toSet(), widget.polylines));
    _polylines = keyByPolylineId(widget.polylines);
  }

  Future<void> _updateCircles() async {
    final GoogleMapController controller = await _controller.future;
-    // ignore: unawaited_futures
-    controller._updateCircles(
+    await controller._updateCircles(
        CircleUpdates.from(_circles.values.toSet(), widget.circles));
    _circles = keyByCircleId(widget.circles);
  }

  Future<void> _updateTileOverlays() async {
    final GoogleMapController controller = await _controller.future;
-    // ignore: unawaited_futures
-    controller._updateTileOverlays(widget.tileOverlays);
+    await controller._updateTileOverlays(widget.tileOverlays);
  }

  Future<void> onPlatformViewCreated(int id) async {
@ -410,7 +404,7 @@ class _GoogleMapState extends State<GoogleMap> {
      this,
    );
    _controller.complete(controller);
-    _updateTileOverlays();
+    unawaited(_updateTileOverlays());
    final MapCreatedCallback? onMapCreated = widget.onMapCreated;
    if (onMapCreated != null) {
      onMapCreated(controller);
--- a/packages/google_maps_flutter/google_maps_flutter/pubspec.yaml
+++ b/packages/google_maps_flutter/google_maps_flutter/pubspec.yaml
@ -2,7 +2,7 @@ name: google_maps_flutter
 description: A Flutter plugin for integrating Google Maps in iOS and Android applications.
 repository: https://github.com/flutter/packages/tree/main/packages/google_maps_flutter/google_maps_flutter
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+maps%22
-version: 2.2.7
+version: 2.2.8

 environment:
  sdk: ">=2.18.0 <4.0.0"
--- a/packages/google_maps_flutter/google_maps_flutter_android/CHANGELOG.md
+++ b/packages/google_maps_flutter/google_maps_flutter_android/CHANGELOG.md
@ -1,3 +1,7 @@
+## NEXT
+
+* Fixes unawaited_futures violations.
+
 ## 2.4.15

 * Removes obsolete null checks on non-nullable values.
--- a/packages/google_maps_flutter/google_maps_flutter_android/example/lib/example_google_map.dart
+++ b/packages/google_maps_flutter/google_maps_flutter_android/example/lib/example_google_map.dart
@ -423,41 +423,41 @@ class _ExampleGoogleMapState extends State<ExampleGoogleMap> {
      return;
    }
    final ExampleGoogleMapController controller = await _controller.future;
-    controller._updateMapConfiguration(updates);
+    await controller._updateMapConfiguration(updates);
    _mapConfiguration = newConfig;
  }

  Future<void> _updateMarkers() async {
    final ExampleGoogleMapController controller = await _controller.future;
-    controller._updateMarkers(
+    await controller._updateMarkers(
        MarkerUpdates.from(_markers.values.toSet(), widget.markers));
    _markers = keyByMarkerId(widget.markers);
  }

  Future<void> _updatePolygons() async {
    final ExampleGoogleMapController controller = await _controller.future;
-    controller._updatePolygons(
+    await controller._updatePolygons(
        PolygonUpdates.from(_polygons.values.toSet(), widget.polygons));
    _polygons = keyByPolygonId(widget.polygons);
  }

  Future<void> _updatePolylines() async {
    final ExampleGoogleMapController controller = await _controller.future;
-    controller._updatePolylines(
+    await controller._updatePolylines(
        PolylineUpdates.from(_polylines.values.toSet(), widget.polylines));
    _polylines = keyByPolylineId(widget.polylines);
  }

  Future<void> _updateCircles() async {
    final ExampleGoogleMapController controller = await _controller.future;
-    controller._updateCircles(
+    await controller._updateCircles(
        CircleUpdates.from(_circles.values.toSet(), widget.circles));
    _circles = keyByCircleId(widget.circles);
  }

  Future<void> _updateTileOverlays() async {
    final ExampleGoogleMapController controller = await _controller.future;
-    controller._updateTileOverlays(widget.tileOverlays);
+    await controller._updateTileOverlays(widget.tileOverlays);
  }

  Future<void> onPlatformViewCreated(int id) async {
@ -468,7 +468,7 @@ class _ExampleGoogleMapState extends State<ExampleGoogleMap> {
      this,
    );
    _controller.complete(controller);
-    _updateTileOverlays();
+    unawaited(_updateTileOverlays());
    widget.onMapCreated?.call(controller);
  }

--- a/packages/google_maps_flutter/google_maps_flutter_ios/CHANGELOG.md
+++ b/packages/google_maps_flutter/google_maps_flutter_ios/CHANGELOG.md
@ -1,3 +1,7 @@
+## NEXT
+
+* Fixes unawaited_futures violations.
+
 ## 2.2.3

 * Removes obsolete null checks on non-nullable values.
--- a/packages/google_maps_flutter/google_maps_flutter_ios/example/shared/maps_example_dart/lib/example_google_map.dart
+++ b/packages/google_maps_flutter/google_maps_flutter_ios/example/shared/maps_example_dart/lib/example_google_map.dart
@ -423,41 +423,41 @@ class _ExampleGoogleMapState extends State<ExampleGoogleMap> {
      return;
    }
    final ExampleGoogleMapController controller = await _controller.future;
-    controller._updateMapConfiguration(updates);
+    await controller._updateMapConfiguration(updates);
    _mapConfiguration = newConfig;
  }

  Future<void> _updateMarkers() async {
    final ExampleGoogleMapController controller = await _controller.future;
-    controller._updateMarkers(
+    await controller._updateMarkers(
        MarkerUpdates.from(_markers.values.toSet(), widget.markers));
    _markers = keyByMarkerId(widget.markers);
  }

  Future<void> _updatePolygons() async {
    final ExampleGoogleMapController controller = await _controller.future;
-    controller._updatePolygons(
+    await controller._updatePolygons(
        PolygonUpdates.from(_polygons.values.toSet(), widget.polygons));
    _polygons = keyByPolygonId(widget.polygons);
  }

  Future<void> _updatePolylines() async {
    final ExampleGoogleMapController controller = await _controller.future;
-    controller._updatePolylines(
+    await controller._updatePolylines(
        PolylineUpdates.from(_polylines.values.toSet(), widget.polylines));
    _polylines = keyByPolylineId(widget.polylines);
  }

  Future<void> _updateCircles() async {
    final ExampleGoogleMapController controller = await _controller.future;
-    controller._updateCircles(
+    await controller._updateCircles(
        CircleUpdates.from(_circles.values.toSet(), widget.circles));
    _circles = keyByCircleId(widget.circles);
  }

  Future<void> _updateTileOverlays() async {
    final ExampleGoogleMapController controller = await _controller.future;
-    controller._updateTileOverlays(widget.tileOverlays);
+    await controller._updateTileOverlays(widget.tileOverlays);
  }

  Future<void> onPlatformViewCreated(int id) async {
@ -468,7 +468,7 @@ class _ExampleGoogleMapState extends State<ExampleGoogleMap> {
      this,
    );
    _controller.complete(controller);
-    _updateTileOverlays();
+    unawaited(_updateTileOverlays());
    widget.onMapCreated?.call(controller);
  }

--- a/packages/google_sign_in/google_sign_in/CHANGELOG.md
+++ b/packages/google_sign_in/google_sign_in/CHANGELOG.md
@ -1,3 +1,7 @@
+## 6.1.2
+
+* Fixes unawaited_futures violations.
+
 ## 6.1.1

 * Removes obsolete null checks on non-nullable values.
--- a/packages/google_sign_in/google_sign_in/example/lib/main.dart
+++ b/packages/google_sign_in/google_sign_in/example/lib/main.dart
@ -70,7 +70,7 @@ class _SignInDemoState extends State<SignInDemo> {
      // Now that we know that the user can access the required scopes, the app
      // can call the REST API.
      if (isAuthorized) {
-        _handleGetContact(account!);
+        unawaited(_handleGetContact(account!));
      }
    });

@ -156,7 +156,7 @@ class _SignInDemoState extends State<SignInDemo> {
      _isAuthorized = isAuthorized;
    });
    if (isAuthorized) {
-      _handleGetContact(_currentUser!);
+      unawaited(_handleGetContact(_currentUser!));
    }
  }

--- a/packages/google_sign_in/google_sign_in/lib/google_sign_in.dart
+++ b/packages/google_sign_in/google_sign_in/lib/google_sign_in.dart
@ -296,11 +296,13 @@ class GoogleSignIn {

  // Performs initialization, guarding it with the _initialization future.
  Future<void> _ensureInitialized() async {
-    return _initialization ??= _doInitialization()
-      ..catchError((dynamic _) {
-        // Invalidate initialization if it errors out.
-        _initialization = null;
-      });
+    _initialization ??= _doInitialization().catchError((Object e) {
+      // Invalidate initialization if it errors out.
+      _initialization = null;
+      // ignore: only_throw_errors
+      throw e;
+    });
+    return _initialization;
  }

  // Actually performs the initialization.
@ -317,10 +319,10 @@ class GoogleSignIn {
      forceCodeForRefreshToken: forceCodeForRefreshToken,
    ));

-    GoogleSignInPlatform.instance.userDataEvents
+    unawaited(GoogleSignInPlatform.instance.userDataEvents
        ?.map((GoogleSignInUserData? userData) {
      return userData != null ? GoogleSignInAccount._(this, userData) : null;
-    }).forEach(_setCurrentUser);
+    }).forEach(_setCurrentUser));
  }

  /// The most recently scheduled method call.
--- a/packages/google_sign_in/google_sign_in/pubspec.yaml
+++ b/packages/google_sign_in/google_sign_in/pubspec.yaml
@ -3,7 +3,7 @@ description: Flutter plugin for Google Sign-In, a secure authentication system
  for signing in with a Google account on Android and iOS.
 repository: https://github.com/flutter/packages/tree/main/packages/google_sign_in/google_sign_in
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+google_sign_in%22
-version: 6.1.1
+version: 6.1.2

 environment:
  sdk: ">=2.18.0 <4.0.0"
--- a/packages/google_sign_in/google_sign_in_web/CHANGELOG.md
+++ b/packages/google_sign_in/google_sign_in_web/CHANGELOG.md
@ -1,3 +1,7 @@
+## 0.12.0+1
+
+* Fixes unawaited_futures violations.
+
 ## 0.12.0

 * Authentication:
--- a/packages/google_sign_in/google_sign_in_web/lib/google_sign_in_web.dart
+++ b/packages/google_sign_in/google_sign_in_web/lib/google_sign_in_web.dart
@ -259,14 +259,14 @@ class GoogleSignInPlugin extends GoogleSignInPlatform {
  Future<void> signOut() async {
    await initialized;

-    _gisClient.signOut();
+    await _gisClient.signOut();
  }

  @override
  Future<void> disconnect() async {
    await initialized;

-    _gisClient.disconnect();
+    await _gisClient.disconnect();
  }

  @override
@ -280,7 +280,7 @@ class GoogleSignInPlugin extends GoogleSignInPlatform {
  Future<void> clearAuthCache({required String token}) async {
    await initialized;

-    _gisClient.clearAuthCache();
+    await _gisClient.clearAuthCache();
  }

  @override
--- a/packages/google_sign_in/google_sign_in_web/lib/src/gis_client.dart
+++ b/packages/google_sign_in/google_sign_in_web/lib/src/gis_client.dart
@ -290,7 +290,7 @@ class GisSdkClient {

  /// Revokes the current authentication.
  Future<void> signOut() async {
-    clearAuthCache();
+    await clearAuthCache();
    id.disableAutoSelect();
  }

@ -299,7 +299,7 @@ class GisSdkClient {
    if (_lastTokenResponse != null) {
      oauth2.revoke(_lastTokenResponse!.access_token);
    }
-    signOut();
+    await signOut();
  }

  /// Returns true if the client has recognized this user before.
--- a/packages/google_sign_in/google_sign_in_web/pubspec.yaml
+++ b/packages/google_sign_in/google_sign_in_web/pubspec.yaml
@ -3,7 +3,7 @@ description: Flutter plugin for Google Sign-In, a secure authentication system
  for signing in with a Google account on Android, iOS and Web.
 repository: https://github.com/flutter/packages/tree/main/packages/google_sign_in/google_sign_in_web
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+google_sign_in%22
-version: 0.12.0
+version: 0.12.0+1

 environment:
  sdk: ">=2.18.0 <4.0.0"
--- a/packages/in_app_purchase/in_app_purchase/CHANGELOG.md
+++ b/packages/in_app_purchase/in_app_purchase/CHANGELOG.md
@ -1,3 +1,7 @@
+## 3.1.7
+
+* Fixes unawaited_futures violations.
+
 ## 3.1.6

 * Bumps minimum in_app_purchase_android version to 0.3.0.
--- a/packages/in_app_purchase/in_app_purchase/example/lib/main.dart
+++ b/packages/in_app_purchase/in_app_purchase/example/lib/main.dart
@ -436,7 +436,7 @@ class _MyAppState extends State<_MyApp> {
            purchaseDetails.status == PurchaseStatus.restored) {
          final bool valid = await _verifyPurchase(purchaseDetails);
          if (valid) {
-            deliverProduct(purchaseDetails);
+            unawaited(deliverProduct(purchaseDetails));
          } else {
            _handleInvalidPurchase(purchaseDetails);
            return;
--- a/packages/in_app_purchase/in_app_purchase/pubspec.yaml
+++ b/packages/in_app_purchase/in_app_purchase/pubspec.yaml
@ -2,7 +2,7 @@ name: in_app_purchase
 description: A Flutter plugin for in-app purchases. Exposes APIs for making in-app purchases through the App Store and Google Play.
 repository: https://github.com/flutter/packages/tree/main/packages/in_app_purchase/in_app_purchase
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+in_app_purchase%22
-version: 3.1.6
+version: 3.1.7

 environment:
  sdk: ">=2.18.0 <4.0.0"
--- a/packages/in_app_purchase/in_app_purchase_android/CHANGELOG.md
+++ b/packages/in_app_purchase/in_app_purchase_android/CHANGELOG.md
@ -1,3 +1,7 @@
+## 0.3.0+4
+
+* Fixes unawaited_futures violations.
+
 ## 0.3.0+3

 * Fixes Java lint issues.
--- a/packages/in_app_purchase/in_app_purchase_android/example/lib/main.dart
+++ b/packages/in_app_purchase/in_app_purchase_android/example/lib/main.dart
@ -397,7 +397,7 @@ class _MyAppState extends State<_MyApp> {
            purchaseDetails.status == PurchaseStatus.restored) {
          final bool valid = await _verifyPurchase(purchaseDetails);
          if (valid) {
-            deliverProduct(purchaseDetails);
+            unawaited(deliverProduct(purchaseDetails));
          } else {
            _handleInvalidPurchase(purchaseDetails);
            return;
--- a/packages/in_app_purchase/in_app_purchase_android/pubspec.yaml
+++ b/packages/in_app_purchase/in_app_purchase_android/pubspec.yaml
@ -2,7 +2,7 @@ name: in_app_purchase_android
 description: An implementation for the Android platform of the Flutter `in_app_purchase` plugin. This uses the Android BillingClient APIs.
 repository: https://github.com/flutter/packages/tree/main/packages/in_app_purchase/in_app_purchase_android
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+in_app_purchase%22
-version: 0.3.0+3
+version: 0.3.0+4

 environment:
  sdk: ">=2.18.0 <4.0.0"
--- a/packages/in_app_purchase/in_app_purchase_android/test/billing_client_wrappers/billing_client_manager_test.dart
+++ b/packages/in_app_purchase/in_app_purchase_android/test/billing_client_wrappers/billing_client_manager_test.dart
@ -54,13 +54,13 @@ void main() {
    test('waits for connection before executing the operations', () async {
      final Completer<void> calledCompleter1 = Completer<void>();
      final Completer<void> calledCompleter2 = Completer<void>();
-      manager.runWithClient((BillingClient _) async {
+      unawaited(manager.runWithClient((BillingClient _) async {
        calledCompleter1.complete();
        return const BillingResultWrapper(responseCode: BillingResponse.ok);
-      });
-      manager.runWithClientNonRetryable(
+      }));
+      unawaited(manager.runWithClientNonRetryable(
        (BillingClient _) async => calledCompleter2.complete(),
-      );
+      ));
      expect(calledCompleter1.isCompleted, equals(false));
      expect(calledCompleter1.isCompleted, equals(false));
      connectedCompleter.complete();
@ -74,7 +74,7 @@ void main() {
      // Ensures all asynchronous connected code finishes.
      await manager.runWithClientNonRetryable((_) async {});

-      manager.client.callHandler(
+      await manager.client.callHandler(
        const MethodCall(onBillingServiceDisconnectedCallback,
            <String, dynamic>{'handle': 0}),
      );
--- a/packages/metrics_center/analysis_options.yaml
+++ b/packages/metrics_center/analysis_options.yaml
@ -1,5 +0,0 @@
-include: ../../analysis_options.yaml
-
-linter:
-  rules:
-    unawaited_futures: true
--- a/packages/palette_generator/test/palette_generator_test.dart
+++ b/packages/palette_generator/test/palette_generator_test.dart
@ -74,7 +74,7 @@ Future<void> main() async {
    // We need to have a testWidgets test in order to initialize the image
    // cache for the other tests, but they timeout if they too are testWidgets
    // tests.
-    tester.pumpWidget(const Placeholder());
+    await tester.pumpWidget(const Placeholder());
  });

  test(
--- a/packages/pigeon/platform_tests/flutter_null_safe_unit_tests/test/null_safe_test.dart
+++ b/packages/pigeon/platform_tests/flutter_null_safe_unit_tests/test/null_safe_test.dart
@ -211,13 +211,13 @@ void main() {
    NullableReturnFlutterApi.setup(mockFlutterApi);

    final Completer<int?> resultCompleter = Completer<int?>();
-    binding.defaultBinaryMessenger.handlePlatformMessage(
+    unawaited(binding.defaultBinaryMessenger.handlePlatformMessage(
      'dev.flutter.pigeon.NullableReturnFlutterApi.doit',
      NullableReturnFlutterApi.codec.encodeMessage(<Object?>[]),
      (ByteData? data) {
        resultCompleter.complete(null);
      },
-    );
+    ));

    expect(resultCompleter.future, completion(null));

@ -234,13 +234,13 @@ void main() {

    final Completer<List<String?>?> resultCompleter =
        Completer<List<String?>?>();
-    binding.defaultBinaryMessenger.handlePlatformMessage(
+    unawaited(binding.defaultBinaryMessenger.handlePlatformMessage(
      'dev.flutter.pigeon.NullableCollectionReturnFlutterApi.doit',
      NullableCollectionReturnFlutterApi.codec.encodeMessage(<Object?>[]),
      (ByteData? data) {
        resultCompleter.complete(null);
      },
-    );
+    ));

    expect(resultCompleter.future, completion(null));

--- a/packages/pigeon/tool/shared/process_utils.dart
+++ b/packages/pigeon/tool/shared/process_utils.dart
@ -28,8 +28,10 @@ Future<int> runProcess(String command, List<String> arguments,
  if (exitCode != 0 && logFailure) {
    // ignore: avoid_print
    print('$command $arguments failed:');
-    process.stdout.pipe(stdout);
-    process.stderr.pipe(stderr);
+    await Future.wait(<Future<void>>[
+      process.stdout.pipe(stdout),
+      process.stderr.pipe(stderr),
+    ]);
  }
  return exitCode;
 }
--- a/packages/shared_preferences/shared_preferences_windows/example/integration_test/shared_preferences_test.dart
+++ b/packages/shared_preferences/shared_preferences_windows/example/integration_test/shared_preferences_test.dart
@ -28,7 +28,7 @@ void main() {

    testWidgets('reading', (WidgetTester _) async {
      final SharedPreferencesWindows preferences = SharedPreferencesWindows();
-      preferences.clear();
+      await preferences.clear();
      final Map<String, Object> values = await preferences.getAll();
      expect(values['String'], isNull);
      expect(values['bool'], isNull);
@ -39,7 +39,7 @@ void main() {

    testWidgets('writing', (WidgetTester _) async {
      final SharedPreferencesWindows preferences = SharedPreferencesWindows();
-      preferences.clear();
+      await preferences.clear();
      await preferences.setValue(
          'String', 'flutter.String', kTestValues2['flutter.String']!);
      await preferences.setValue(
@ -60,7 +60,7 @@ void main() {

    testWidgets('removing', (WidgetTester _) async {
      final SharedPreferencesWindows preferences = SharedPreferencesWindows();
-      preferences.clear();
+      await preferences.clear();
      const String key = 'flutter.testKey';
      await preferences.setValue('String', key, kTestValues['flutter.String']!);
      await preferences.setValue('Bool', key, kTestValues['flutter.bool']!);
@ -75,7 +75,7 @@ void main() {

    testWidgets('clearing', (WidgetTester _) async {
      final SharedPreferencesWindows preferences = SharedPreferencesWindows();
-      preferences.clear();
+      await preferences.clear();
      await preferences.setValue(
          'String', 'flutter.String', kTestValues['flutter.String']!);
      await preferences.setValue(
--- a/packages/url_launcher/url_launcher_ios/test/url_launcher_ios_test.dart
+++ b/packages/url_launcher/url_launcher_ios/test/url_launcher_ios_test.dart
@ -36,7 +36,7 @@ void main() {
    test('canLaunch invalid URL passes the PlatformException through',
        () async {
      final UrlLauncherIOS launcher = UrlLauncherIOS(api: api);
-      expectLater(launcher.canLaunch('invalid://u r l'),
+      await expectLater(launcher.canLaunch('invalid://u r l'),
          throwsA(isA<PlatformException>()));
    });

@ -74,7 +74,7 @@ void main() {

    test('launch invalid URL passes the PlatformException through', () async {
      final UrlLauncherIOS launcher = UrlLauncherIOS(api: api);
-      expectLater(
+      await expectLater(
          launcher.launch(
            'invalid://u r l',
            useSafariVC: false,
--- a/packages/url_launcher/url_launcher_macos/test/url_launcher_macos_test.dart
+++ b/packages/url_launcher/url_launcher_macos/test/url_launcher_macos_test.dart
@ -34,13 +34,13 @@ void main() {

      test('invalid URL returns a PlatformException', () async {
        final UrlLauncherMacOS launcher = UrlLauncherMacOS(api: api);
-        expectLater(launcher.canLaunch('invalid://u r l'),
+        await expectLater(launcher.canLaunch('invalid://u r l'),
            throwsA(isA<PlatformException>()));
      });

      test('passes unexpected PlatformExceptions through', () async {
        final UrlLauncherMacOS launcher = UrlLauncherMacOS(api: api);
-        expectLater(launcher.canLaunch('unexpectedthrow://someexception'),
+        await expectLater(launcher.canLaunch('unexpectedthrow://someexception'),
            throwsA(isA<PlatformException>()));
      });
    });
@ -78,7 +78,7 @@ void main() {

      test('invalid URL returns a PlatformException', () async {
        final UrlLauncherMacOS launcher = UrlLauncherMacOS(api: api);
-        expectLater(
+        await expectLater(
            launcher.launch(
              'invalid://u r l',
              useSafariVC: false,
@ -93,7 +93,7 @@ void main() {

      test('passes unexpected PlatformExceptions through', () async {
        final UrlLauncherMacOS launcher = UrlLauncherMacOS(api: api);
-        expectLater(
+        await expectLater(
            launcher.launch(
              'unexpectedthrow://someexception',
              useSafariVC: false,
--- a/packages/web_benchmarks/CHANGELOG.md
+++ b/packages/web_benchmarks/CHANGELOG.md
@ -1,3 +1,7 @@
+## 0.1.0+5
+
+* Fixes unawaited_futures violations.
+
 ## 0.1.0+4

 * Removes obsolete null checks on non-nullable values.
--- a/packages/web_benchmarks/lib/src/runner.dart
+++ b/packages/web_benchmarks/lib/src/runner.dart
@ -151,7 +151,7 @@ class BenchmarkServer {
              'Requested to run benchmark ${benchmarkIterator.current}, but '
              'got results for $benchmarkName.',
            ));
-            server.close();
+            unawaited(server.close());
          }

          // Trace data is null when the benchmark is not frame-based, such as RawRecorder.
@ -180,7 +180,7 @@ class BenchmarkServer {
        } else if (request.requestedUri.path.endsWith('/on-error')) {
          final Map<String, dynamic> errorDetails =
              json.decode(await request.readAsString()) as Map<String, dynamic>;
-          server.close();
+          unawaited(server.close());
          // Keep the stack trace as a string. It's thrown in the browser, not this Dart VM.
          final String errorMessage =
              'Caught browser-side error: ${errorDetails['error']}\n${errorDetails['stackTrace']}';
@ -314,7 +314,7 @@ class BenchmarkServer {
        );
        await chrome?.whenExits;
      }
-      server.close();
+      unawaited(server.close());
    }
  }
 }
--- a/packages/web_benchmarks/pubspec.yaml
+++ b/packages/web_benchmarks/pubspec.yaml
@ -2,7 +2,7 @@ name: web_benchmarks
 description: A benchmark harness for performance-testing Flutter apps in Chrome.
 repository: https://github.com/flutter/packages/tree/main/packages/web_benchmarks
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+web_benchmarks%22
-version: 0.1.0+4
+version: 0.1.0+5

 environment:
  sdk: ">=2.18.0 <4.0.0"
--- a/packages/webview_flutter/webview_flutter/analysis_options.yaml
+++ b/packages/webview_flutter/webview_flutter/analysis_options.yaml
@ -0,0 +1,8 @@
+# TODO(stuartmorgan): Remove this file and fix all the unawaited_futures
+# violations. See https://github.com/flutter/flutter/issues/127323
+
+include: ../../../analysis_options.yaml
+
+linter:
+  rules:
+    unawaited_futures: false
--- a/packages/webview_flutter/webview_flutter_android/analysis_options.yaml
+++ b/packages/webview_flutter/webview_flutter_android/analysis_options.yaml
@ -0,0 +1,8 @@
+# TODO(stuartmorgan): Remove this file and fix all the unawaited_futures
+# violations. See https://github.com/flutter/flutter/issues/127323
+
+include: ../../../analysis_options.yaml
+
+linter:
+  rules:
+    unawaited_futures: false
--- a/packages/webview_flutter/webview_flutter_web/example/integration_test/webview_flutter_test.dart
+++ b/packages/webview_flutter/webview_flutter_web/example/integration_test/webview_flutter_test.dart
@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

+import 'dart:async';
 import 'dart:html' as html;
 import 'dart:io';

@ -20,23 +21,23 @@ Future<void> main() async {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();

  final HttpServer server = await HttpServer.bind(InternetAddress.anyIPv4, 0);
-  server.forEach((HttpRequest request) {
+  unawaited(server.forEach((HttpRequest request) {
    if (request.uri.path == '/hello.txt') {
      request.response.writeln('Hello, world.');
    } else {
      fail('unexpected request: ${request.method} ${request.uri}');
    }
    request.response.close();
-  });
+  }));
  final String prefixUrl = 'http://${server.address.address}:${server.port}';
  final String primaryUrl = '$prefixUrl/hello.txt';

  testWidgets('loadRequest', (WidgetTester tester) async {
    final WebWebViewController controller =
-        WebWebViewController(const PlatformWebViewControllerCreationParams())
-          ..loadRequest(
-            LoadRequestParams(uri: Uri.parse(primaryUrl)),
-          );
+        WebWebViewController(const PlatformWebViewControllerCreationParams());
+    await controller.loadRequest(
+      LoadRequestParams(uri: Uri.parse(primaryUrl)),
+    );

    await tester.pumpWidget(
      Directionality(
@ -58,10 +59,10 @@ Future<void> main() async {

  testWidgets('loadHtmlString', (WidgetTester tester) async {
    final WebWebViewController controller =
-        WebWebViewController(const PlatformWebViewControllerCreationParams())
-          ..loadHtmlString(
-            'data:text/html;charset=utf-8,${Uri.encodeFull('test html')}',
-          );
+        WebWebViewController(const PlatformWebViewControllerCreationParams());
+    await controller.loadHtmlString(
+      'data:text/html;charset=utf-8,${Uri.encodeFull('test html')}',
+    );

    await tester.pumpWidget(
      Directionality(
--- a/packages/webview_flutter/webview_flutter_wkwebview/analysis_options.yaml
+++ b/packages/webview_flutter/webview_flutter_wkwebview/analysis_options.yaml
@ -0,0 +1,8 @@
+# TODO(stuartmorgan): Remove this file and fix all the unawaited_futures
+# violations. See https://github.com/flutter/flutter/issues/127323
+
+include: ../../../analysis_options.yaml
+
+linter:
+  rules:
+    unawaited_futures: false
--- a/script/configs/custom_analysis.yaml
+++ b/script/configs/custom_analysis.yaml
@ -11,17 +11,24 @@
 # which references this file from source, but out-of-repo.
 # Contact stuartmorgan or devoncarew for assistance if necessary.

+# Temporary opt-outs of unawaited_futures; see
+# https://github.com/flutter/flutter/issues/127323
+- camera/camera_android_camerax
+- webview_flutter/webview_flutter
+- webview_flutter/webview_flutter_android
+- webview_flutter/webview_flutter_wkwebview
+# Opts out of unawaited_futures, matching flutter/flutter's disabling due
+# to interactions with animation.
+- animations
 # Deliberately uses flutter_lints, as that's what it is demonstrating.
 - flutter_lints/example
 # Adopts some flutter_tools rules regarding public api docs due to being an
 # extension of the tool and using tools base code.
 - flutter_migrate
-# Adds unawaited_futures. We should investigating adding this to the root
-# options instead.
- metrics_center
+# Has some test files that are intentionally broken to conduct dart fix tests.
+# Also opts out of unawaited_futures, matching flutter/flutter.
+- go_router
 # Has some constructions that are currently handled poorly by dart format.
 - rfw/example
 # Disables docs requirements, as it is test code.
 - web_benchmarks/testing/test_app
-# Has some test files that are intentionally broken to conduct dart fix tests.
- go_router
--- a/script/tool/lib/src/common/package_looping_command.dart
+++ b/script/tool/lib/src/common/package_looping_command.dart
@ -324,7 +324,7 @@ abstract class PackageLoopingCommand extends PackageCommand {
    }
    _currentPackageEntry = null;

-    completeRun();
+    await completeRun();

    print('\n');
    // If there were any errors reported, summarize them and exit.
--- a/script/tool/lib/src/common/package_state_utils.dart
+++ b/script/tool/lib/src/common/package_state_utils.dart
@ -177,7 +177,8 @@ Future<bool> _isDevChange(List<String> pathComponents,
      // Entry point for the 'custom-test' command, which is only for CI and
      // local testing.
      pathComponents.first == 'run_tests.sh' ||
-      // Ignoring lints doesn't affect clients.
+      // Lints don't affect clients.
+      pathComponents.contains('analysis_options.yaml') ||
      pathComponents.contains('lint-baseline.xml') ||
      // Example build files are very unlikely to be interesting to clients.
      _isExampleBuildFile(pathComponents) ||
--- a/script/tool/lib/src/make_deps_path_based_command.dart
+++ b/script/tool/lib/src/make_deps_path_based_command.dart
@ -249,7 +249,8 @@ $dependencyOverridesKey:
    // example app doesn't. Since integration tests are run in the example app,
    // it needs the overrides in order for tests to pass.
    for (final RepositoryPackage example in package.getExamples()) {
-      _addDependencyOverridesIfNecessary(example, localDependencies, versions,
+      await _addDependencyOverridesIfNecessary(
+          example, localDependencies, versions,
          additionalPackagesToOverride: packagesToOverride);
    }

--- a/script/tool/test/publish_check_command_test.dart
+++ b/script/tool/test/publish_check_command_test.dart
@ -159,7 +159,7 @@ void main() {
    test('fails if AUTHORS is missing', () async {
      final RepositoryPackage package =
          createFakePackage('a_package', packagesDir);
-      package.authorsFile.delete();
+      package.authorsFile.deleteSync();

      Error? commandError;
      final List<String> output = await runCapturingPrint(
@ -183,7 +183,7 @@ void main() {
          packagesDir.parent
              .childDirectory('third_party')
              .childDirectory('packages'));
-      package.authorsFile.delete();
+      package.authorsFile.deleteSync();

      final List<String> output =
          await runCapturingPrint(runner, <String>['publish-check']);
--- a/script/tool/test/readme_check_command_test.dart
+++ b/script/tool/test/readme_check_command_test.dart
@ -100,7 +100,7 @@ void main() {
    const String subpackageName = 'special_test';
    final RepositoryPackage miscSubpackage =
        createFakePackage(subpackageName, package.directory);
-    miscSubpackage.readmeFile.delete();
+    miscSubpackage.readmeFile.deleteSync();

    final List<String> output =
        await runCapturingPrint(runner, <String>['readme-check']);
--- a/script/tool/test/version_check_command_test.dart
+++ b/script/tool/test/version_check_command_test.dart
@ -879,6 +879,7 @@ packages/plugin/example/android/lint-baseline.xml
 packages/plugin/example/android/src/androidTest/foo/bar/FooTest.java
 packages/plugin/example/ios/RunnerTests/Foo.m
 packages/plugin/example/ios/RunnerUITests/info.plist
+packages/plugin/analysis_options.yaml
 packages/plugin/CHANGELOG.md
 ''')),
        ];