Revert "Log all lines from ios-deploy (#127502)" (#127684)

This reverts commit a19b3436.

We added this logging to try and determine if the reason for Dart VM errors (https://github.com/flutter/flutter/issues/121231) was caused by some issue with the streams.
A recent test proves that is not the case:
https://ci.chromium.org/ui/p/flutter/builders/prod/Mac_ios%20platform_view_ios__start_up/11046/overview
The test shows the Dart VM url in the device log. However, the test log does NOT show a log for the Dart VM url but does show the stack trace, which all come from the main stream, which means it's not an issue with the secondary streams not receiving the log.

So reverting the debugging we added.

packages/flutter_tools/lib/src/ios/ios_deploy.dart

@@ -348,12 +348,6 @@ class IOSDeployDebugger {
           .transform<String>(utf8.decoder)
           .transform<String>(const LineSplitter())
           .listen((String line) {
-
-        // TODO(vashworth): Revert after https://github.com/flutter/flutter/issues/121231 is resolved.
-        if (line.isNotEmpty) {
-          _logger.printTrace(line);
-        }
-
         _monitorIOSDeployFailure(line, _logger);
 
         // (lldb)    platform select remote-'ios' --sysroot
@@ -371,6 +365,7 @@ class IOSDeployDebugger {
           }
           final String prompt = line.substring(0, promptEndIndex);
           lldbRun = RegExp(RegExp.escape(prompt) + r'\s*run');
+          _logger.printTrace(line);
           return;
         }
 
@@ -389,6 +384,7 @@ class IOSDeployDebugger {
         // success
         // 2020-09-15 13:42:25.185474-0700 Runner[477:181141] flutter: The Dart VM service is listening on http://127.0.0.1:57782/
         if (lldbRun.hasMatch(line)) {
+          _logger.printTrace(line);
           _debuggerState = _IOSDeployDebuggerState.launching;
           // TODO(vashworth): Remove all debugger state comments when https://github.com/flutter/flutter/issues/126412 is resolved.
           _logger.printTrace('Debugger state set to launching.');
@@ -397,6 +393,7 @@ class IOSDeployDebugger {
         // Next line after "run" must be "success", or the attach failed.
         // Example: "error: process launch failed"
         if (_debuggerState == _IOSDeployDebuggerState.launching) {
+          _logger.printTrace(line);
           final bool attachSuccess = line == 'success';
           _debuggerState = attachSuccess ? _IOSDeployDebuggerState.attached : _IOSDeployDebuggerState.detached;
           _logger.printTrace('Debugger state set to ${attachSuccess ? 'attached' : 'detached'}.');
@@ -411,6 +408,7 @@ class IOSDeployDebugger {
         // process signal SIGSTOP
         if (line.contains(_signalStop)) {
           // The app is about to be stopped. Only show in verbose mode.
+          _logger.printTrace(line);
           return;
         }
 
@@ -423,6 +421,7 @@ class IOSDeployDebugger {
 
         if (line == _backTraceAll) {
           // The app is stopped and the backtrace for all threads will be printed.
+          _logger.printTrace(line);
           // Even though we're not "detached", just stopped, mark as detached so the backtrace
           // is only show in verbose.
           _debuggerState = _IOSDeployDebuggerState.detached;
@@ -439,6 +438,7 @@ class IOSDeployDebugger {
 
         if (line.contains('PROCESS_STOPPED') || _lldbProcessStopped.hasMatch(line)) {
           // The app has been stopped. Dump the backtrace, and detach.
+          _logger.printTrace(line);
           _iosDeployProcess?.stdin.writeln(_backTraceAll);
           if (_processResumeCompleter == null) {
             detach();
@@ -449,17 +449,20 @@ class IOSDeployDebugger {
         if (line.contains('PROCESS_EXITED') || _lldbProcessExit.hasMatch(line)) {
           // The app exited or crashed, so exit. Continue passing debugging
           // messages to the log reader until it exits to capture crash dumps.
+          _logger.printTrace(line);
           exit();
           return;
         }
         if (_lldbProcessDetached.hasMatch(line)) {
           // The debugger has detached from the app, and there will be no more debugging messages.
           // Kill the ios-deploy process.
+          _logger.printTrace(line);
           exit();
           return;
         }
 
         if (_lldbProcessResuming.hasMatch(line)) {
+          _logger.printTrace(line);
           // we marked this detached when we received [_backTraceAll]
           _debuggerState = _IOSDeployDebuggerState.attached;
           _logger.printTrace('Debugger state set to attached.');
@@ -467,6 +470,7 @@ class IOSDeployDebugger {
         }
 
         if (_debuggerState != _IOSDeployDebuggerState.attached) {
+          _logger.printTrace(line);
           return;
         }
         if (lastLineFromDebugger != null && lastLineFromDebugger!.isNotEmpty && line.isEmpty) {
@@ -484,7 +488,7 @@ class IOSDeployDebugger {
           .transform<String>(const LineSplitter())
           .listen((String line) {
         _monitorIOSDeployFailure(line, _logger);
-        _logger.printTrace('error: $line');
+        _logger.printTrace(line);
       });
       unawaited(_iosDeployProcess!.exitCode.then((int status) async {
         _logger.printTrace('ios-deploy exited with code $exitCode');

packages/flutter_tools/lib/src/resident_runner.dart

@@ -36,7 +36,6 @@ import 'devfs.dart';
 import 'device.dart';
 import 'features.dart';
 import 'globals.dart' as globals;
-import 'ios/devices.dart';
 import 'project.dart';
 import 'resident_devtools_handler.dart';
 import 'run_cold.dart';
@@ -229,9 +228,8 @@ class FlutterDevice {
   FlutterVmService? vmService;
   DevFS? devFS;
   ApplicationPackage? package;
-  @visibleForTesting
   // ignore: cancel_subscriptions
-  StreamSubscription<String>? loggingSubscription;
+  StreamSubscription<String>? _loggingSubscription;
   bool? _isListeningForVmServiceUri;
 
   /// Whether the stream [vmServiceUris] is still open.
@@ -394,26 +392,23 @@ class FlutterDevice {
   }
 
   Future<void> startEchoingDeviceLog() async {
-    if (loggingSubscription != null) {
+    if (_loggingSubscription != null) {
       return;
     }
-    final DeviceLogReader logReader = await device!.getLogReader(app: package);
-    final Stream<String> logStream = logReader.logLines;
-    // TODO(vashworth): Remove check for IOSDeviceLogReader after
-    // https://github.com/flutter/flutter/issues/121231 is resolved.
-    loggingSubscription = logStream.listen((String line) {
-      if (logReader is! IOSDeviceLogReader && !line.contains(globals.kVMServiceMessageRegExp)) {
+    final Stream<String> logStream = (await device!.getLogReader(app: package)).logLines;
+    _loggingSubscription = logStream.listen((String line) {
+      if (!line.contains(globals.kVMServiceMessageRegExp)) {
         globals.printStatus(line, wrap: false);
       }
     });
   }
 
   Future<void> stopEchoingDeviceLog() async {
-    if (loggingSubscription == null) {
+    if (_loggingSubscription == null) {
       return;
     }
-    await loggingSubscription!.cancel();
-    loggingSubscription = null;
+    await _loggingSubscription!.cancel();
+    _loggingSubscription = null;
   }
 
   Future<void> initLogReader() async {

packages/flutter_tools/test/general.shard/ios/ios_deploy_test.dart

@@ -94,26 +94,6 @@ void main () {
         logger = BufferLogger.test();
       });
 
-      testWithoutContext('print all lines', () async {
-        final StreamController<List<int>> stdin = StreamController<List<int>>();
-        final FakeProcessManager processManager = FakeProcessManager.list(<FakeCommand>[
-          FakeCommand(
-            command: const <String>['ios-deploy'],
-            stdout: "(mylldb)    platform select remote-'ios' --sysroot\r\n(mylldb)     run\r\nsuccess\r\nrandom string\r\n",
-            stdin: IOSink(stdin.sink),
-          ),
-        ]);
-        final IOSDeployDebugger iosDeployDebugger = IOSDeployDebugger.test(
-          processManager: processManager,
-          logger: logger,
-        );
-        expect(await iosDeployDebugger.launchAndAttach(), isTrue);
-        expect(logger.traceText, contains("(mylldb)    platform select remote-'ios' --sysroot"));
-        expect(logger.traceText, contains('(mylldb)     run'));
-        expect(logger.traceText, contains('success'));
-        expect(logger.traceText, contains('random string'));
-      });
-
       testWithoutContext('custom lldb prompt', () async {
         final StreamController<List<int>> stdin = StreamController<List<int>>();
         final FakeProcessManager processManager = FakeProcessManager.list(<FakeCommand>[

packages/flutter_tools/test/general.shard/resident_runner_test.dart

@@ -20,7 +20,6 @@ import 'package:flutter_tools/src/base/platform.dart';
 import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/build_system/targets/scene_importer.dart';
 import 'package:flutter_tools/src/build_system/targets/shader_compiler.dart';
-import 'package:flutter_tools/src/cache.dart';
 import 'package:flutter_tools/src/compile.dart';
 import 'package:flutter_tools/src/convert.dart';
 import 'package:flutter_tools/src/devfs.dart';
@@ -28,8 +27,6 @@ import 'package:flutter_tools/src/device.dart';
 import 'package:flutter_tools/src/device_port_forwarder.dart';
 import 'package:flutter_tools/src/features.dart';
 import 'package:flutter_tools/src/globals.dart' as globals;
-import 'package:flutter_tools/src/ios/devices.dart';
-import 'package:flutter_tools/src/ios/mac.dart';
 import 'package:flutter_tools/src/project.dart';
 import 'package:flutter_tools/src/reporting/reporting.dart';
 import 'package:flutter_tools/src/resident_devtools_handler.dart';
@@ -44,7 +41,6 @@ import 'package:vm_service/vm_service.dart' as vm_service;
 
 import '../src/common.dart';
 import '../src/context.dart';
-import '../src/fake_devices.dart';
 import '../src/fake_vm_services.dart';
 import '../src/fakes.dart';
 import '../src/testbed.dart';
@@ -2442,70 +2438,6 @@ flutter:
     expect(flutterDevice.devFS!.hasSetAssetDirectory, true);
     expect(fakeVmServiceHost!.hasRemainingExpectations, false);
   }));
-
-  group('startEchoingDeviceLog', () {
-    late FakeProcessManager processManager;
-    late Artifacts artifacts;
-    late Cache fakeCache;
-    late BufferLogger logger;
-
-    setUp(() {
-      processManager = FakeProcessManager.empty();
-      fakeCache = Cache.test(processManager: FakeProcessManager.any());
-      artifacts = Artifacts.test();
-      logger = BufferLogger.test();
-    });
-
-    testUsingContext('IOSDeviceLogReader does not print logs', () async {
-      final IOSDeviceLogReader logReader = IOSDeviceLogReader.test(
-        iMobileDevice: IMobileDevice(
-          artifacts: artifacts,
-          processManager: processManager,
-          cache: fakeCache,
-          logger: logger,
-        ),
-        useSyslog: false,
-      );
-      device = FakeDevice(deviceLogReader: logReader);
-      final TestFlutterDevice flutterDevice = TestFlutterDevice(
-        device,
-      );
-
-      await flutterDevice.startEchoingDeviceLog();
-      final Future<List<String>> linesFromStream = logReader.logLines.toList();
-      logReader.linesController.add('event');
-      await logReader.linesController.close();
-      final List<String> lines = await linesFromStream;
-
-      expect(lines, contains('event'));
-      expect(logger.statusText, isEmpty);
-
-      await flutterDevice.stopEchoingDeviceLog();
-    }, overrides: <Type, Generator>{
-      Logger: () => logger,
-    });
-
-    testUsingContext('Non-IOSDeviceLogReader does print logs', () async {
-      final FakeDeviceLogReader logReader = FakeDeviceLogReader();
-      device = FakeDevice(deviceLogReader: logReader);
-      final TestFlutterDevice flutterDevice = TestFlutterDevice(
-        device,
-      );
-
-      await flutterDevice.startEchoingDeviceLog();
-      final Future<List<String>> linesFromStream = logReader.logLines.toList();
-      logReader.addLine('event');
-      await logReader.dispose();
-      final List<String> lines = await linesFromStream;
-
-      expect(lines, contains('event'));
-      expect(logger.statusText, contains('event'));
-
-      await flutterDevice.stopEchoingDeviceLog();
-    }, overrides: <Type, Generator>{
-      Logger: () => logger,
-    });
-  });
 }
 
 // This implements [dds.DartDevelopmentService], not the [DartDevelopmentService]
@@ -2744,16 +2676,13 @@ class FakeDevice extends Fake implements Device {
     this.supportsHotRestart = true,
     this.supportsScreenshot = true,
     this.supportsFlutterExit = true,
-    DeviceLogReader? deviceLogReader,
   }) : _isLocalEmulator = isLocalEmulator,
        _targetPlatform = targetPlatform,
-       _sdkNameAndVersion = sdkNameAndVersion,
-       _deviceLogReader = deviceLogReader;
+       _sdkNameAndVersion = sdkNameAndVersion;
 
   final bool _isLocalEmulator;
   final TargetPlatform _targetPlatform;
   final String _sdkNameAndVersion;
-  final DeviceLogReader? _deviceLogReader;
 
   bool disposed = false;
   bool appStopped = false;
@@ -2811,12 +2740,7 @@ class FakeDevice extends Fake implements Device {
   FutureOr<DeviceLogReader> getLogReader({
     ApplicationPackage? app,
     bool includePastLogs = false,
-  }) {
-    if (_deviceLogReader != null) {
-      return _deviceLogReader!;
-    }
-    return NoOpDeviceLogReader(name);
-  }
+  }) => NoOpDeviceLogReader(name);
 
   @override
   DevicePortForwarder portForwarder = const NoOpDevicePortForwarder();