Revert "Keep LLDB connection to iOS device alive while running from CLI. (#36194)" (#36293)

This reverts commit 5501a1c1.

packages/flutter_tools/lib/src/base/process.dart

@@ -129,11 +129,6 @@ Future<Process> runCommand(
 /// If [filter] is non-null, all lines that do not match it are removed. If
 /// [mapFunction] is present, all lines that match [filter] are also forwarded
 /// to [mapFunction] for further processing.
-///
-/// If [detachFilter] is non-null, the returned future will complete with exit code `0`
-/// when the process outputs something matching [detachFilter] to stderr. The process will
-/// continue in the background, and the final exit code will not be reported. [filter] is
-/// not considered on lines matching [detachFilter].
 Future<int> runCommandAndStreamOutput(
   List<String> cmd, {
   String workingDirectory,
@@ -143,9 +138,7 @@ Future<int> runCommandAndStreamOutput(
   RegExp filter,
   StringConverter mapFunction,
   Map<String, String> environment,
-  RegExp detachFilter,
 }) async {
-  final Completer<int> result = Completer<int>();
   final Process process = await runCommand(
     cmd,
     workingDirectory: workingDirectory,
@@ -155,15 +148,6 @@ Future<int> runCommandAndStreamOutput(
   final StreamSubscription<String> stdoutSubscription = process.stdout
     .transform<String>(utf8.decoder)
     .transform<String>(const LineSplitter())
-    .map((String line) {
-      if (detachFilter != null && detachFilter.hasMatch(line) && !result.isCompleted) {
-        // Detach from the process, assuming it will eventually complete successfully.
-        // Output printed after detaching (incl. stdout and stderr) will still be
-        // processed by [filter] and [mapFunction].
-        result.complete(0);
-      }
-      return line;
-    })
     .where((String line) => filter == null || filter.hasMatch(line))
     .listen((String line) {
       if (mapFunction != null)
@@ -187,10 +171,8 @@ Future<int> runCommandAndStreamOutput(
         printError('$prefix$line', wrap: false);
     });
 
-  // Wait for stdout to be fully processed before completing with the exit code (non-detached case),
-  // because process.exitCode may complete first causing flaky tests. If the process detached,
-  // we at least have a predictable output for stdout, although (unavoidably) not for stderr.
-  Future<void> readOutput() async {
+  // Wait for stdout to be fully processed
+  // because process.exitCode may complete first causing flaky tests.
   await waitGroup<void>(<Future<void>>[
     stdoutSubscription.asFuture<void>(),
     stderrSubscription.asFuture<void>(),
@@ -201,14 +183,7 @@ Future<int> runCommandAndStreamOutput(
     stderrSubscription.cancel(),
   ]);
 
-    // Complete the future if the we did not detach the process yet.
-    if (!result.isCompleted) {
-      result.complete(process.exitCode);
-    }
-  }
-
-  unawaited(readOutput());
-  return result.future;
+  return await process.exitCode;
 }
 
 /// Runs the [command] interactively, connecting the stdin/stdout/stderr

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

@@ -48,7 +48,7 @@ class IOSDeploy {
       '--bundle',
       bundlePath,
       '--no-wifi',
-      '--noninteractive',
+      '--justlaunch',
     ];
     if (launchArguments.isNotEmpty) {
       launchCommand.add('--args');
@@ -66,14 +66,11 @@ class IOSDeploy {
     iosDeployEnv['PATH'] = '/usr/bin:${iosDeployEnv['PATH']}';
     iosDeployEnv.addEntries(<MapEntry<String, String>>[cache.dyLdLibEntry]);
 
-    // Detach from the ios-deploy process once it' outputs 'autoexit', signaling that the
-    // App has been started and LLDB is in "autopilot" mode.
     return await runCommandAndStreamOutput(
       launchCommand,
       mapFunction: _monitorInstallationFailure,
       trace: true,
       environment: iosDeployEnv,
-      detachFilter: RegExp('.*autoexit.*')
     );
   }
 

packages/flutter_tools/test/general.shard/base/process_test.dart

@@ -2,20 +2,17 @@
 // 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_tools/src/base/io.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/base/platform.dart';
 import 'package:flutter_tools/src/base/process.dart';
 import 'package:flutter_tools/src/base/terminal.dart';
-import 'package:flutter_tools/src/convert.dart';
 import 'package:mockito/mockito.dart';
 import 'package:process/process.dart';
 
 import '../../src/common.dart';
 import '../../src/context.dart';
-import '../../src/mocks.dart' show FakeProcess, MockProcess, MockProcessManager;
+import '../../src/mocks.dart' show MockProcess, MockProcessManager;
 
 void main() {
   group('process exceptions', () {
@@ -93,43 +90,6 @@ void main() {
       Platform: () => FakePlatform.fromPlatform(const LocalPlatform())..stdoutSupportsAnsi = false,
     });
   });
-
-  group('runCommandAndStreamOutput', () {
-    ProcessManager mockProcessManager;
-    const Utf8Encoder utf8 = Utf8Encoder();
-
-    setUp(() {
-      mockProcessManager = PlainMockProcessManager();
-    });
-
-    testUsingContext('detach after detachFilter matches', () async {
-      // Create a fake process which outputs three lines ("foo", "bar" and "baz")
-      // to stdout, nothing to stderr, and doesn't exit.
-      final Process fake = FakeProcess(
-        exitCode: Completer<int>().future,
-        stdout: Stream<List<int>>.fromIterable(
-          <String>['foo\n', 'bar\n', 'baz\n'].map(utf8.convert)),
-        stderr: const Stream<List<int>>.empty());
-
-      when(mockProcessManager.start(<String>['test1'])).thenAnswer((_) => Future<Process>.value(fake));
-
-      // Detach when we see "bar", and check that:
-      //  - mapFunction still gets run on "baz",
-      //  - we don't wait for the process to terminate (it never will), and
-      //  - we get an exit-code of 0 back.
-      bool seenBaz = false;
-      String mapFunction(String line) {
-        seenBaz = seenBaz || line == 'baz';
-        return line;
-      }
-
-      final int exitCode = await runCommandAndStreamOutput(
-        <String>['test1'], mapFunction: mapFunction, detachFilter: RegExp('.*baz.*'));
-
-      expect(exitCode, 0);
-      expect(seenBaz, true);
-    }, overrides: <Type, Generator>{ProcessManager: () => mockProcessManager});
-  });
 }
 
 class PlainMockProcessManager extends Mock implements ProcessManager {}

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

@@ -199,9 +199,6 @@ class MockStream<T> implements Stream<T> {
   @override
   Stream<T> where(bool test(T event)) => MockStream<T>();
 
-  @override
-  Stream<S> map<S>(S Function(T) _) => MockStream<S>();
-
   @override
   StreamSubscription<T> listen(void onData(T event), { Function onError, void onDone(), bool cancelOnError }) {
     return MockStreamSubscription<T>();