Ignore fuchsia device-finder no device error (#52761)

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

@@ -2,9 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:meta/meta.dart';
+import 'package:process/process.dart';
+
 import '../base/common.dart';
+import '../base/logger.dart';
 import '../base/process.dart';
-import '../globals.dart' as globals;
 import 'fuchsia_sdk.dart';
 
 // Usage: device-finder <flags> <subcommand> <subcommand args>
@@ -19,24 +22,42 @@ import 'fuchsia_sdk.dart';
 
 /// A simple wrapper for the Fuchsia SDK's 'device-finder' tool.
 class FuchsiaDevFinder {
+  FuchsiaDevFinder({
+    @required FuchsiaArtifacts fuchsiaArtifacts,
+    @required Logger logger,
+    @required ProcessManager processManager,
+  })
+    : _fuchsiaArtifacts = fuchsiaArtifacts,
+      _logger = logger,
+      _processUtils = ProcessUtils(logger: logger, processManager: processManager);
+
+
+  final FuchsiaArtifacts _fuchsiaArtifacts;
+  final Logger _logger;
+  final ProcessUtils _processUtils;
+
   /// Returns a list of attached devices as a list of strings with entries
   /// formatted as follows:
   /// 192.168.42.172 scare-cable-skip-joy
   Future<List<String>> list({ Duration timeout }) async {
-    if (fuchsiaArtifacts.devFinder == null ||
-        !fuchsiaArtifacts.devFinder.existsSync()) {
+    if (_fuchsiaArtifacts.devFinder == null ||
+        !_fuchsiaArtifacts.devFinder.existsSync()) {
       throwToolExit('Fuchsia device-finder tool not found.');
     }
     final List<String> command = <String>[
-      fuchsiaArtifacts.devFinder.path,
+      _fuchsiaArtifacts.devFinder.path,
       'list',
       '-full',
       if (timeout != null)
         ...<String>['-timeout', '${timeout.inMilliseconds}ms']
     ];
-    final RunResult result = await processUtils.run(command);
+    final RunResult result = await _processUtils.run(command);
     if (result.exitCode != 0) {
-      globals.printError('device-finder failed: ${result.stderr}');
+      // No devices returns error code 1.
+      // https://bugs.fuchsia.dev/p/fuchsia/issues/detail?id=48563
+      if (!result.stderr.contains('no devices found')) {
+        _logger.printError('device-finder failed: ${result.stderr}');
+      }
       return null;
     }
     return result.stdout.split('\n');
@@ -50,20 +71,20 @@ class FuchsiaDevFinder {
   /// 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 {
-    if (fuchsiaArtifacts.devFinder == null ||
-        !fuchsiaArtifacts.devFinder.existsSync()) {
+    if (_fuchsiaArtifacts.devFinder == null ||
+        !_fuchsiaArtifacts.devFinder.existsSync()) {
       throwToolExit('Fuchsia device-finder tool not found.');
     }
     final List<String> command = <String>[
-      fuchsiaArtifacts.devFinder.path,
+      _fuchsiaArtifacts.devFinder.path,
       'resolve',
       if (local) '-local',
       '-device-limit', '1',
       deviceName,
     ];
-    final RunResult result = await processUtils.run(command);
+    final RunResult result = await _processUtils.run(command);
     if (result.exitCode != 0) {
-      globals.printError('device-finder failed: ${result.stderr}');
+      _logger.printError('device-finder failed: ${result.stderr}');
       return null;
     }
     return result.stdout.trim();

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

@@ -558,14 +558,14 @@ class FuchsiaDevice extends Device {
 
   /// Run `command` on the Fuchsia device shell.
   Future<RunResult> shell(String command) async {
-    if (fuchsiaArtifacts.sshConfig == null) {
+    if (globals.fuchsiaArtifacts.sshConfig == null) {
       throwToolExit('Cannot interact with device. No ssh config.\n'
                     'Try setting FUCHSIA_SSH_CONFIG or FUCHSIA_BUILD_DIR.');
     }
     return await processUtils.run(<String>[
       'ssh',
       '-F',
-      fuchsiaArtifacts.sshConfig.absolute.path,
+      globals.fuchsiaArtifacts.sshConfig.absolute.path,
       id, // Device's IP address.
       command,
     ]);
@@ -573,14 +573,14 @@ class FuchsiaDevice extends Device {
 
   /// Transfer the file [origin] from the device to [destination].
   Future<RunResult> scp(String origin, String destination) async {
-    if (fuchsiaArtifacts.sshConfig == null) {
+    if (globals.fuchsiaArtifacts.sshConfig == null) {
       throwToolExit('Cannot interact with device. No ssh config.\n'
                     'Try setting FUCHSIA_SSH_CONFIG or FUCHSIA_BUILD_DIR.');
     }
     return await processUtils.run(<String>[
       'scp',
       '-F',
-      fuchsiaArtifacts.sshConfig.absolute.path,
+      globals.fuchsiaArtifacts.sshConfig.absolute.path,
       '$id:$origin',
       destination,
     ]);
@@ -742,7 +742,7 @@ class _FuchsiaPortForwarder extends DevicePortForwarder {
       'ssh',
       '-6',
       '-F',
-      fuchsiaArtifacts.sshConfig.absolute.path,
+      globals.fuchsiaArtifacts.sshConfig.absolute.path,
       '-nNT',
       '-vvv',
       '-f',
@@ -774,7 +774,7 @@ class _FuchsiaPortForwarder extends DevicePortForwarder {
     final List<String> command = <String>[
       'ssh',
       '-F',
-      fuchsiaArtifacts.sshConfig.absolute.path,
+      globals.fuchsiaArtifacts.sshConfig.absolute.path,
       '-O',
       'cancel',
       '-vvv',

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

@@ -107,14 +107,14 @@ class FuchsiaPM {
   /// [FuchsiaDevFinder.resolve], and [port] should be an unused port for the
   /// http server to bind.
   Future<Process> serve(String repoPath, String host, int port) async {
-    if (fuchsiaArtifacts.pm == null) {
+    if (globals.fuchsiaArtifacts.pm == null) {
       throwToolExit('Fuchsia pm tool not found');
     }
     if (isIPv6Address(host.split('%').first)) {
       host = '[${host.replaceAll('%', '%25')}]';
     }
     final List<String> command = <String>[
-      fuchsiaArtifacts.pm.path,
+      globals.fuchsiaArtifacts.pm.path,
       'serve',
       '-repo',
       repoPath,
@@ -151,10 +151,10 @@ class FuchsiaPM {
   }
 
   Future<bool> _runPMCommand(List<String> args) async {
-    if (fuchsiaArtifacts.pm == null) {
+    if (globals.fuchsiaArtifacts.pm == null) {
       throwToolExit('Fuchsia pm tool not found');
     }
-    final List<String> command = <String>[fuchsiaArtifacts.pm.path, ...args];
+    final List<String> command = <String>[globals.fuchsiaArtifacts.pm.path, ...args];
     final RunResult result = await processUtils.run(command);
     return result.exitCode == 0;
   }

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

@@ -17,9 +17,6 @@ import 'fuchsia_pm.dart';
 /// The [FuchsiaSdk] instance.
 FuchsiaSdk get fuchsiaSdk => context.get<FuchsiaSdk>();
 
-/// The [FuchsiaArtifacts] instance.
-FuchsiaArtifacts get fuchsiaArtifacts => context.get<FuchsiaArtifacts>();
-
 /// Returns [true] if the current platform supports Fuchsia targets.
 bool isFuchsiaSupportedPlatform() {
   return globals.platform.isLinux || globals.platform.isMacOS;
@@ -37,7 +34,11 @@ class FuchsiaSdk {
   /// Interface to the 'device-finder' tool.
   FuchsiaDevFinder _fuchsiaDevFinder;
   FuchsiaDevFinder get fuchsiaDevFinder =>
-      _fuchsiaDevFinder ??= FuchsiaDevFinder();
+      _fuchsiaDevFinder ??= FuchsiaDevFinder(
+        fuchsiaArtifacts: globals.fuchsiaArtifacts,
+        logger: globals.logger,
+        processManager: globals.processManager
+      );
 
   /// Interface to the 'kernel_compiler' tool.
   FuchsiaKernelCompiler _fuchsiaKernelCompiler;
@@ -48,8 +49,8 @@ class FuchsiaSdk {
   ///    $ device-finder list -full
   ///    > 192.168.42.56 paper-pulp-bush-angel
   Future<String> listDevices({ Duration timeout }) async {
-    if (fuchsiaArtifacts.devFinder == null ||
-        !fuchsiaArtifacts.devFinder.existsSync()) {
+    if (globals.fuchsiaArtifacts.devFinder == null ||
+        !globals.fuchsiaArtifacts.devFinder.existsSync()) {
       return null;
     }
     final List<String> devices = await fuchsiaDevFinder.list(timeout: timeout);
@@ -67,8 +68,8 @@ class FuchsiaSdk {
       final StreamController<String> controller = StreamController<String>(onCancel: () {
         process.kill();
       });
-      if (fuchsiaArtifacts.sshConfig == null ||
-          !fuchsiaArtifacts.sshConfig.existsSync()) {
+      if (globals.fuchsiaArtifacts.sshConfig == null ||
+          !globals.fuchsiaArtifacts.sshConfig.existsSync()) {
         globals.printError('Cannot read device logs: No ssh config.');
         globals.printError('Have you set FUCHSIA_SSH_CONFIG or FUCHSIA_BUILD_DIR?');
         return null;
@@ -77,7 +78,7 @@ class FuchsiaSdk {
       final List<String> cmd = <String>[
         'ssh',
         '-F',
-        fuchsiaArtifacts.sshConfig.absolute.path,
+        globals.fuchsiaArtifacts.sshConfig.absolute.path,
         id, // The device's IP.
         remoteCommand,
       ];

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

@@ -5,7 +5,6 @@
 import '../base/context.dart';
 import '../doctor.dart';
 import '../globals.dart' as globals;
-import 'fuchsia_sdk.dart';
 
 /// The [FuchsiaWorkflow] instance.
 FuchsiaWorkflow get fuchsiaWorkflow => context.get<FuchsiaWorkflow>();
@@ -21,12 +20,12 @@ class FuchsiaWorkflow implements Workflow {
 
   @override
   bool get canListDevices {
-    return fuchsiaArtifacts.devFinder != null;
+    return globals.fuchsiaArtifacts.devFinder != null;
   }
 
   @override
   bool get canLaunchDevices {
-    return fuchsiaArtifacts.devFinder != null && fuchsiaArtifacts.sshConfig != null;
+    return globals.fuchsiaArtifacts.devFinder != null && globals.fuchsiaArtifacts.sshConfig != null;
   }
 
   @override

packages/flutter_tools/lib/src/globals.dart

@@ -21,6 +21,7 @@ import 'base/template.dart';
 import 'base/terminal.dart';
 import 'base/user_messages.dart';
 import 'cache.dart';
+import 'fuchsia/fuchsia_sdk.dart';
 import 'ios/ios_deploy.dart';
 import 'ios/ios_workflow.dart';
 import 'ios/mac.dart';
@@ -69,6 +70,7 @@ Platform get platform => context.get<Platform>() ?? _kLocalPlatform;
 AndroidStudio get androidStudio => context.get<AndroidStudio>();
 AndroidSdk get androidSdk => context.get<AndroidSdk>();
 FlutterVersion get flutterVersion => context.get<FlutterVersion>();
+FuchsiaArtifacts get fuchsiaArtifacts => context.get<FuchsiaArtifacts>();
 IMobileDevice get iMobileDevice => context.get<IMobileDevice>();
 IOSDeploy get iosDeploy => context.get<IOSDeploy>();
 IOSSimulatorUtils get iosSimulatorUtils => context.get<IOSSimulatorUtils>();

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

@@ -0,0 +1,135 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:file/file.dart';
+import 'package:file/memory.dart';
+import 'package:flutter_tools/src/base/file_system.dart';
+import 'package:flutter_tools/src/base/logger.dart';
+import 'package:flutter_tools/src/fuchsia/fuchsia_dev_finder.dart';
+import 'package:flutter_tools/src/fuchsia/fuchsia_sdk.dart';
+import 'package:mockito/mockito.dart';
+import 'package:process/process.dart';
+
+import '../../src/common.dart';
+import '../../src/context.dart';
+
+void main() {
+  MockFuchsiaArtifacts mockFuchsiaArtifacts;
+  BufferLogger logger;
+  MemoryFileSystem memoryFileSystem;
+  File deviceFinder;
+
+  setUp(() {
+    mockFuchsiaArtifacts = MockFuchsiaArtifacts();
+    memoryFileSystem = MemoryFileSystem.test();
+    logger = BufferLogger.test();
+    deviceFinder = memoryFileSystem.file('device-finder');
+
+    when(mockFuchsiaArtifacts.devFinder).thenReturn(deviceFinder);
+  });
+
+  group('device-finder list', () {
+    testWithoutContext('device-finder not found', () {
+      final FuchsiaDevFinder fuchsiaDevFinder = FuchsiaDevFinder(
+        fuchsiaArtifacts: mockFuchsiaArtifacts,
+        logger: logger,
+        processManager: FakeProcessManager.any(),
+      );
+
+      expect(() async => await fuchsiaDevFinder.list(),
+        throwsToolExit(message: 'Fuchsia device-finder tool not found.'));
+    });
+
+    testWithoutContext('no devices', () async {
+      deviceFinder.createSync();
+
+      final ProcessManager processManager = FakeProcessManager.list(<FakeCommand>[
+        FakeCommand(
+          command: <String>[ deviceFinder.path, 'list', '-full' ],
+          exitCode: 1,
+          stderr: 'list.go:72: no devices found',
+        ),
+      ]);
+
+      final FuchsiaDevFinder fuchsiaDevFinder = FuchsiaDevFinder(
+        fuchsiaArtifacts: mockFuchsiaArtifacts,
+        logger: logger,
+        processManager: processManager,
+      );
+
+      expect(await fuchsiaDevFinder.list(), isNull);
+      expect(logger.errorText, isEmpty);
+    });
+
+    testWithoutContext('error', () async {
+      deviceFinder.createSync();
+
+      final ProcessManager processManager = FakeProcessManager.list(<FakeCommand>[
+        FakeCommand(
+          command: <String>[ deviceFinder.path, 'list', '-full' ],
+          exitCode: 1,
+          stderr: 'unexpected error',
+        ),
+      ]);
+
+      final FuchsiaDevFinder fuchsiaDevFinder = FuchsiaDevFinder(
+        fuchsiaArtifacts: mockFuchsiaArtifacts,
+        logger: logger,
+        processManager: processManager,
+      );
+
+      expect(await fuchsiaDevFinder.list(), isNull);
+      expect(logger.errorText, contains('unexpected error'));
+    });
+
+    testWithoutContext('devices found', () async {
+      deviceFinder.createSync();
+
+      final ProcessManager processManager = FakeProcessManager.list(<FakeCommand>[
+        FakeCommand(
+          command: <String>[ deviceFinder.path, 'list', '-full' ],
+          exitCode: 0,
+          stdout: 'device1\ndevice2',
+        ),
+      ]);
+
+      final FuchsiaDevFinder fuchsiaDevFinder = FuchsiaDevFinder(
+        fuchsiaArtifacts: mockFuchsiaArtifacts,
+        logger: logger,
+        processManager: processManager,
+      );
+
+      expect(await fuchsiaDevFinder.list(), <String>['device1', 'device2']);
+      expect(logger.errorText, isEmpty);
+    });
+
+    testWithoutContext('timeout', () async {
+      deviceFinder.createSync();
+
+      final ProcessManager processManager = FakeProcessManager.list(<FakeCommand>[
+        FakeCommand(
+          command: <String>[
+            deviceFinder.path,
+            'list',
+            '-full',
+            '-timeout',
+            '2000ms',
+          ],
+          exitCode: 0,
+          stdout: 'device1',
+        ),
+      ]);
+
+      final FuchsiaDevFinder fuchsiaDevFinder = FuchsiaDevFinder(
+        fuchsiaArtifacts: mockFuchsiaArtifacts,
+        logger: logger,
+        processManager: processManager,
+      );
+
+      expect(await fuchsiaDevFinder.list(timeout: const Duration(seconds: 2)), <String>['device1']);
+    });
+  });
+}
+
+class MockFuchsiaArtifacts extends Mock implements FuchsiaArtifacts {}