[fuchsia] - update getting local host address logic (#75981)

packages/flutter_tools/lib/src/fuchsia/fuchsia_dev_finder.dart

@@ -68,12 +68,9 @@ class FuchsiaDevFinder {
 
   /// Returns the address of the named device.
   ///
-  /// If local is true, then gives the address by which the device reaches the
-  /// host.
-  ///
   /// The string [deviceName] should be the name of the device from the
   /// 'list' command, e.g. 'scare-cable-skip-joy'.
-  Future<String> resolve(String deviceName, {bool local = false}) async {
+  Future<String> resolve(String deviceName) async {
     if (_fuchsiaArtifacts.devFinder == null ||
         !_fuchsiaArtifacts.devFinder.existsSync()) {
       throwToolExit('Fuchsia device-finder tool not found.');
@@ -81,7 +78,6 @@ class FuchsiaDevFinder {
     final List<String> command = <String>[
       _fuchsiaArtifacts.devFinder.path,
       'resolve',
-      if (local) '-local',
       '-device-limit', '1',
       deviceName,
     ];

packages/flutter_tools/lib/src/fuchsia/fuchsia_device.dart

@@ -211,7 +211,6 @@ class FuchsiaDevices extends PollingDeviceDiscovery {
     final String name = words[1];
     final String resolvedHost = await _fuchsiaSdk.fuchsiaDevFinder.resolve(
       name,
-      local: false,
     );
     if (resolvedHost == null) {
       _logger.printError('Failed to resolve host for Fuchsia device `$name`');
@@ -297,14 +296,7 @@ class FuchsiaDevice extends Device {
     }
     // Stop the app if it's currently running.
     await stopApp(package);
-    final String host = await fuchsiaSdk.fuchsiaDevFinder.resolve(
-      name,
-      local: true,
-    );
-    if (host == null) {
-      globals.printError('Failed to resolve host for Fuchsia device');
-      return LaunchResult.failed();
-    }
+    final String host = await hostAddress;
     // Find out who the device thinks we are.
     final int port = await globals.os.findFreePort();
     if (port == 0) {

packages/flutter_tools/test/general.shard/fuchsia/fuchsia_device_test.dart

@@ -876,16 +876,17 @@ void main() {
     FakeOperatingSystemUtils osUtils;
     FakeFuchsiaDeviceTools fuchsiaDeviceTools;
     MockFuchsiaSdk fuchsiaSdk;
-    MockFuchsiaArtifacts fuchsiaArtifacts;
     Artifacts artifacts;
+    FakeProcessManager fakeSuccessfulProcessManager;
+    FakeProcessManager fakeFailedProcessManager;
+    File sshConfig;
 
     setUp(() {
       memoryFileSystem = MemoryFileSystem.test();
       osUtils = FakeOperatingSystemUtils();
       fuchsiaDeviceTools = FakeFuchsiaDeviceTools();
       fuchsiaSdk = MockFuchsiaSdk();
-      fuchsiaArtifacts = MockFuchsiaArtifacts();
-
+      sshConfig = MemoryFileSystem.test().file('ssh_config')..writeAsStringSync('\n');
       artifacts = Artifacts.test();
       for (final BuildMode mode in <BuildMode>[BuildMode.debug, BuildMode.release]) {
         memoryFileSystem.file(
@@ -908,6 +909,20 @@ void main() {
               platform: TargetPlatform.fuchsia_arm64, mode: mode),
         ).createSync();
       }
+      fakeSuccessfulProcessManager = FakeProcessManager.list(<FakeCommand>[
+        FakeCommand(
+          command: <String>['ssh', '-F', sshConfig.absolute.path, '123', r'echo $SSH_CONNECTION'],
+          stdout: 'fe80::8c6c:2fff:fe3d:c5e1%ethp0003 50666 fe80::5054:ff:fe63:5e7a%ethp0003 22',
+        ),
+      ]);
+      fakeFailedProcessManager = FakeProcessManager.list(<FakeCommand>[
+        FakeCommand(
+          command: <String>['ssh', '-F', sshConfig.absolute.path, '123', r'echo $SSH_CONNECTION'],
+          stdout: '',
+          stderr: '',
+          exitCode: 1,
+        ),
+      ]);
     });
 
     Future<LaunchResult> setupAndStartApp({
@@ -949,9 +964,9 @@ void main() {
     }, overrides: <Type, Generator>{
       Artifacts: () => artifacts,
       FileSystem: () => memoryFileSystem,
-      ProcessManager: () => FakeProcessManager.any(),
+      ProcessManager: () => fakeSuccessfulProcessManager,
       FuchsiaDeviceTools: () => fuchsiaDeviceTools,
-      FuchsiaArtifacts: () => fuchsiaArtifacts,
+      FuchsiaArtifacts: () => FuchsiaArtifacts(sshConfig: sshConfig),
       FuchsiaSdk: () => fuchsiaSdk,
       OperatingSystemUtils: () => osUtils,
     });
@@ -976,9 +991,9 @@ void main() {
     }, overrides: <Type, Generator>{
       Artifacts: () => artifacts,
       FileSystem: () => memoryFileSystem,
-      ProcessManager: () => FakeProcessManager.any(),
+      ProcessManager: () => fakeSuccessfulProcessManager,
       FuchsiaDeviceTools: () => fuchsiaDeviceTools,
-      FuchsiaArtifacts: () => fuchsiaArtifacts,
+      FuchsiaArtifacts: () => FuchsiaArtifacts(sshConfig: sshConfig),
       FuchsiaSdk: () => fuchsiaSdk,
       OperatingSystemUtils: () => osUtils,
     });
@@ -991,9 +1006,9 @@ void main() {
     }, overrides: <Type, Generator>{
       Artifacts: () => artifacts,
       FileSystem: () => memoryFileSystem,
-      ProcessManager: () => FakeProcessManager.any(),
+      ProcessManager: () => fakeSuccessfulProcessManager,
       FuchsiaDeviceTools: () => fuchsiaDeviceTools,
-      FuchsiaArtifacts: () => fuchsiaArtifacts,
+      FuchsiaArtifacts: () => FuchsiaArtifacts(sshConfig: sshConfig),
       FuchsiaSdk: () => fuchsiaSdk,
       OperatingSystemUtils: () => osUtils,
     });
@@ -1006,9 +1021,23 @@ void main() {
     }, overrides: <Type, Generator>{
       Artifacts: () => artifacts,
       FileSystem: () => memoryFileSystem,
-      ProcessManager: () => FakeProcessManager.any(),
+      ProcessManager: () => FakeProcessManager.list(<FakeCommand>[
+            const FakeCommand(
+              command: <String>[
+                'Artifact.genSnapshot.TargetPlatform.fuchsia_arm64.release',
+                '--deterministic',
+                '--snapshot_kind=app-aot-elf',
+                '--elf=build/fuchsia/elf.aotsnapshot',
+                'build/fuchsia/app_name.dil'
+              ],
+            ),
+            FakeCommand(
+              command: <String>['ssh', '-F', sshConfig.absolute.path, '123', r'echo $SSH_CONNECTION'],
+              stdout: 'fe80::8c6c:2fff:fe3d:c5e1%ethp0003 50666 fe80::5054:ff:fe63:5e7a%ethp0003 22',
+            ),
+          ]),
       FuchsiaDeviceTools: () => fuchsiaDeviceTools,
-      FuchsiaArtifacts: () => fuchsiaArtifacts,
+      FuchsiaArtifacts: () => FuchsiaArtifacts(sshConfig: sshConfig),
       FuchsiaSdk: () => fuchsiaSdk,
       OperatingSystemUtils: () => osUtils,
     });
@@ -1021,25 +1050,37 @@ void main() {
     }, overrides: <Type, Generator>{
       Artifacts: () => artifacts,
       FileSystem: () => memoryFileSystem,
-      ProcessManager: () => FakeProcessManager.any(),
+      ProcessManager: () => fakeSuccessfulProcessManager,
       FuchsiaDeviceTools: () => fuchsiaDeviceTools,
-      FuchsiaArtifacts: () => fuchsiaArtifacts,
+      FuchsiaArtifacts: () => FuchsiaArtifacts(sshConfig: sshConfig),
       FuchsiaSdk: () => fuchsiaSdk,
       OperatingSystemUtils: () => osUtils,
     });
 
-    testUsingContext('fail with correct LaunchResult when device-finder fails', () async {
-      final LaunchResult launchResult =
-          await setupAndStartApp(prebuilt: true, mode: BuildMode.release);
-      expect(launchResult.started, isFalse);
-      expect(launchResult.hasObservatory, isFalse);
+    testUsingContext('fail when cant get ssh config', () async {
+      expect(() async =>
+          await setupAndStartApp(prebuilt: true, mode: BuildMode.release),
+          throwsToolExit(message: 'Cannot interact with device. No ssh config.\n'
+                                  'Try setting FUCHSIA_SSH_CONFIG or FUCHSIA_BUILD_DIR.'));
     }, overrides: <Type, Generator>{
       Artifacts: () => artifacts,
       FileSystem: () => memoryFileSystem,
       ProcessManager: () => FakeProcessManager.any(),
       FuchsiaDeviceTools: () => fuchsiaDeviceTools,
-      FuchsiaArtifacts: () => fuchsiaArtifacts,
-      FuchsiaSdk: () => MockFuchsiaSdk(devFinder: FailingDevFinder()),
+      FuchsiaArtifacts: () => FuchsiaArtifacts(sshConfig: null),
+      OperatingSystemUtils: () => osUtils,
+    });
+
+    testUsingContext('fail when cant get host address', () async {
+      expect(() async =>
+        await setupAndStartApp(prebuilt: true, mode: BuildMode.release),
+          throwsToolExit(message: 'Failed to get local address, aborting.'));
+    }, overrides: <Type, Generator>{
+      Artifacts: () => artifacts,
+      FileSystem: () => memoryFileSystem,
+      ProcessManager: () => fakeFailedProcessManager,
+      FuchsiaDeviceTools: () => fuchsiaDeviceTools,
+      FuchsiaArtifacts: () => FuchsiaArtifacts(sshConfig: sshConfig),
       OperatingSystemUtils: () => osUtils,
     });
 
@@ -1051,9 +1092,9 @@ void main() {
     }, overrides: <Type, Generator>{
       Artifacts: () => artifacts,
       FileSystem: () => memoryFileSystem,
-      ProcessManager: () => FakeProcessManager.any(),
+      ProcessManager: () => fakeSuccessfulProcessManager,
       FuchsiaDeviceTools: () => fuchsiaDeviceTools,
-      FuchsiaArtifacts: () => fuchsiaArtifacts,
+      FuchsiaArtifacts: () => FuchsiaArtifacts(sshConfig: sshConfig),
       FuchsiaSdk: () => MockFuchsiaSdk(pm: FailingPM()),
       OperatingSystemUtils: () => osUtils,
     });
@@ -1066,9 +1107,9 @@ void main() {
     }, overrides: <Type, Generator>{
       Artifacts: () => artifacts,
       FileSystem: () => memoryFileSystem,
-      ProcessManager: () => FakeProcessManager.any(),
+      ProcessManager: () => fakeSuccessfulProcessManager,
       FuchsiaDeviceTools: () => FakeFuchsiaDeviceTools(amber: FailingAmberCtl()),
-      FuchsiaArtifacts: () => fuchsiaArtifacts,
+      FuchsiaArtifacts: () => FuchsiaArtifacts(sshConfig: sshConfig),
       FuchsiaSdk: () => fuchsiaSdk,
       OperatingSystemUtils: () => osUtils,
     });
@@ -1081,9 +1122,9 @@ void main() {
     }, overrides: <Type, Generator>{
       Artifacts: () => artifacts,
       FileSystem: () => memoryFileSystem,
-      ProcessManager: () => FakeProcessManager.any(),
+      ProcessManager: () => fakeSuccessfulProcessManager,
       FuchsiaDeviceTools: () => FakeFuchsiaDeviceTools(tiles: FailingTilesCtl()),
-      FuchsiaArtifacts: () => fuchsiaArtifacts,
+      FuchsiaArtifacts: () => FuchsiaArtifacts(sshConfig: sshConfig),
       FuchsiaSdk: () => fuchsiaSdk,
       OperatingSystemUtils: () => osUtils,
     });
@@ -1548,23 +1589,11 @@ class FakeFuchsiaDevFinder implements FuchsiaDevFinder {
   }
 
   @override
-  Future<String> resolve(String deviceName, {bool local = false}) async {
+  Future<String> resolve(String deviceName) async {
     return '192.168.42.10';
   }
 }
 
-class FailingDevFinder implements FuchsiaDevFinder {
-  @override
-  Future<List<String>> list({ Duration timeout }) async {
-    return null;
-  }
-
-  @override
-  Future<String> resolve(String deviceName, {bool local = false}) async {
-    return null;
-  }
-}
-
 class MockFuchsiaSdk extends Mock implements FuchsiaSdk {
   MockFuchsiaSdk({
     FuchsiaPM pm,