Remove web, fuchsia, and unsupported devices from all (#35709)

packages/flutter_tools/lib/src/device.dart

@@ -169,17 +169,49 @@ class DeviceManager {
 
   /// Find and return a list of devices based on the current project and environment.
   ///
-  /// Returns a list of deviecs specified by the user. If the user has not specified
-  /// all devices and has multiple connected then filter the list by those supported
-  /// in the current project and remove non-ephemeral device types.
+  /// Returns a list of deviecs specified by the user.
+  ///
+  /// * If the user specified '-d all', then return all connected devices which
+  /// support the current project, except for fuchsia and web.
+  ///
+  /// * If the user specified a device id, then do nothing as the list is already
+  /// filtered by [getDevices].
+  ///
+  /// * If the user did not specify a device id and there is more than one
+  /// device connected, then filter out unsupported devices and prioritize
+  /// ephemeral devices.
   Future<List<Device>> findTargetDevices(FlutterProject flutterProject) async {
     List<Device> devices = await getDevices().toList();
 
-    if (devices.length > 1 && !deviceManager.hasSpecifiedAllDevices && !deviceManager.hasSpecifiedDeviceId) {
-      devices = devices
-          .where((Device device) => isDeviceSupportedForProject(device, flutterProject))
-          .toList();
+    // Always remove web and fuchsia devices from `--all`. This setting
+    // currently requires devices to share a frontend_server and resident
+    // runnner instance. Both web and fuchsia require differently configured
+    // compilers, and web requires an entirely different resident runner.
+    if (hasSpecifiedAllDevices) {
+      devices = <Device>[
+        for (Device device in devices)
+          if (await device.targetPlatform != TargetPlatform.fuchsia &&
+              await device.targetPlatform != TargetPlatform.web_javascript)
+            device
+      ];
+    }
 
+    // If there is no specified device, the remove all devices which are not
+    // supported by the current application. For example, if there was no
+    // 'android' folder then don't attempt to launch with an Android device.
+    if (devices.length > 1 && !hasSpecifiedDeviceId) {
+      devices = <Device>[
+        for (Device device in devices)
+          if (device.isSupportedForProject(flutterProject))
+            device
+      ];
+    }
+
+    // If there are still multiple devices and the user did not specify to run
+    // all, then attempt to prioritize ephemeral devices. For example, if the
+    // use only typed 'flutter run' and both an Android device and desktop
+    // device are availible, choose the Android device.
+    if (devices.length > 1 && !hasSpecifiedAllDevices) {
       // Note: ephemeral is nullable for device types where this is not well
       // defined.
       if (devices.any((Device device) => device.ephemeral == true)) {

packages/flutter_tools/test/device_test.dart

@@ -4,6 +4,7 @@
 
 import 'dart:async';
 
+import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/device.dart';
 import 'package:flutter_tools/src/project.dart';
 
@@ -43,12 +44,18 @@ void main() {
     _MockDevice nonEphemeralOne;
     _MockDevice nonEphemeralTwo;
     _MockDevice unsupported;
+    _MockDevice webDevice;
+    _MockDevice fuchsiaDevice;
 
     setUp(() {
       ephemeral = _MockDevice('ephemeral', 'ephemeral', true);
       nonEphemeralOne = _MockDevice('nonEphemeralOne', 'nonEphemeralOne', false);
       nonEphemeralTwo = _MockDevice('nonEphemeralTwo', 'nonEphemeralTwo', false);
       unsupported = _MockDevice('unsupported', 'unsupported', true, false);
+      webDevice = _MockDevice('webby', 'webby')
+        ..targetPlatform = Future<TargetPlatform>.value(TargetPlatform.web_javascript);
+      fuchsiaDevice = _MockDevice('fuchsiay', 'fuchsiay')
+        ..targetPlatform = Future<TargetPlatform>.value(TargetPlatform.fuchsia);
     });
 
     testUsingContext('chooses ephemeral device', () async {
@@ -79,6 +86,36 @@ void main() {
         nonEphemeralTwo,
       ]);
     });
+
+    testUsingContext('Removes web and fuchsia from --all', () async {
+      final List<Device> devices = <Device>[
+        webDevice,
+        fuchsiaDevice,
+      ];
+      final DeviceManager deviceManager = TestDeviceManager(devices);
+      deviceManager.specifiedDeviceId = 'all';
+
+      final List<Device> filtered = await deviceManager.findTargetDevices(FlutterProject.current());
+
+      expect(filtered, <Device>[]);
+    });
+
+    testUsingContext('Removes unsupported devices from --all', () async {
+      final List<Device> devices = <Device>[
+        nonEphemeralOne,
+        nonEphemeralTwo,
+        unsupported,
+      ];
+      final DeviceManager deviceManager = TestDeviceManager(devices);
+      deviceManager.specifiedDeviceId = 'all';
+
+      final List<Device> filtered = await deviceManager.findTargetDevices(FlutterProject.current());
+
+      expect(filtered, <Device>[
+        nonEphemeralOne,
+        nonEphemeralTwo,
+      ]);
+    });
   });
 }
 
@@ -106,6 +143,9 @@ class _MockDevice extends Device {
   @override
   final String name;
 
+  @override
+  Future<TargetPlatform> targetPlatform = Future<TargetPlatform>.value(TargetPlatform.android_arm);
+
   @override
   void noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);