Version 3.4.0-247.0.dev

Merge 1b5368f into dev

Author: Dart CI

.github/workflows/scorecards-analysis.yml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
+        uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633
         with:
           persist-credentials: false
 

.github/workflows/third-party-deps-scan.yml

@@ -21,7 +21,7 @@ jobs:
       contents: read
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
+        uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633
         with:
           persist-credentials: false
       - name: "setup python"

pkg/analysis_server/tool/code_completion/benchmark/flutter.dart

@@ -0,0 +1,114 @@
+// Copyright (c) 2024, the Dart project authors. Please see the AUTHORS file
+// for details. 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:analysis_server/src/services/completion/dart/completion_manager.dart';
+import 'package:analysis_server/src/services/completion/dart/suggestion_builder.dart';
+import 'package:analyzer/dart/analysis/results.dart';
+import 'package:analyzer/file_system/overlay_file_system.dart';
+import 'package:analyzer/file_system/physical_file_system.dart';
+import 'package:analyzer/src/dart/analysis/analysis_context_collection.dart';
+import 'package:analyzer/src/util/performance/operation_performance.dart';
+
+import 'sliding_statistics.dart';
+
+/// A tool to see the current performance of code completion at an interesting
+/// location. To see details, run it with `--observe:5000` and then use
+/// DevTools CPU profiler.
+///
+/// Currently this is not a tool to track performance, it does not record it
+/// anywhere.
+///
+/// Update the marked code as necessary to construct a case for checking
+/// performance. The code below is just one example that we saw to have
+/// significant cost.
+///
+/// Don't forget to update [flutterPackagePath].
+Future<void> main() async {
+  await _runForever(
+    path: '$flutterPackagePath/lib/test.dart',
+    markedCode: r'''
+import 'package:flutter/widgets.dart';
+Widget x = ^;
+''',
+  );
+}
+
+const String flutterEnvironmentPath =
+    '/Users/scheglov/dart/flutter_elements/environment';
+
+/// This should be the path of the `package:flutter` in a local checkout.
+/// You don't have to use [flutterEnvironmentPath] from above.
+const String flutterPackagePath = '$flutterEnvironmentPath/packages/flutter';
+
+Future<void> _runForever({
+  required String path,
+  required String markedCode,
+}) async {
+  final offset = markedCode.indexOf('^');
+  if (offset == -1) {
+    throw ArgumentError('No ^ marker');
+  }
+
+  final rawCode =
+      markedCode.substring(0, offset) + markedCode.substring(offset + 1);
+  if (rawCode.contains('^')) {
+    throw ArgumentError('Duplicate ^ marker');
+  }
+
+  final resourceProvider = OverlayResourceProvider(
+    PhysicalResourceProvider.INSTANCE,
+  );
+
+  resourceProvider.setOverlay(
+    path,
+    content: rawCode,
+    modificationStamp: -1,
+  );
+
+  var collection = AnalysisContextCollectionImpl(
+    resourceProvider: resourceProvider,
+    includedPaths: [path],
+    sdkPath: '/Users/scheglov/Applications/dart-sdk',
+  );
+  var analysisContext = collection.contextFor(path);
+  var analysisSession = analysisContext.currentSession;
+  var unitResult = await analysisSession.getResolvedUnit(path);
+  unitResult as ResolvedUnitResult;
+
+  var dartRequest = DartCompletionRequest.forResolvedUnit(
+    resolvedUnit: unitResult,
+    offset: offset,
+  );
+
+  final statistics = SlidingStatistics(100);
+  while (true) {
+    var timer = Stopwatch()..start();
+    var budget = CompletionBudget(Duration(seconds: 30));
+    List<CompletionSuggestionBuilder> suggestions = [];
+    for (var i = 0; i < 10; i++) {
+      suggestions = await DartCompletionManager(
+        budget: budget,
+        notImportedSuggestions: NotImportedSuggestions(),
+      ).computeSuggestions(
+        dartRequest,
+        OperationPerformanceImpl('<root>'),
+        useFilter: false,
+      );
+    }
+
+    final responseTime = timer.elapsedMilliseconds;
+    statistics.add(responseTime);
+    if (statistics.isReady) {
+      print(
+        '[${DateTime.now().millisecondsSinceEpoch}]'
+        '[time: $responseTime ms][mean: ${statistics.mean.toStringAsFixed(1)}]'
+        '[stdDev: ${statistics.standardDeviation.toStringAsFixed(3)}]'
+        '[min: ${statistics.min.toStringAsFixed(1)}]'
+        '[max: ${statistics.max.toStringAsFixed(1)}]',
+      );
+    } else {
+      print('[time: $responseTime ms][suggestions: ${suggestions.length}]');
+    }
+  }
+}

pkg/analysis_server/tool/code_completion/benchmark/sliding_statistics.dart

@@ -0,0 +1,65 @@
+// Copyright (c) 2024, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'dart:math';
+import 'dart:typed_data';
+
+class SlidingStatistics {
+  final Uint32List _values;
+  int _index = 0;
+  bool _isReady = false;
+
+  SlidingStatistics(int length) : _values = Uint32List(length);
+
+  bool get isReady => _isReady;
+
+  int get max {
+    var result = 0;
+    for (final value in _values) {
+      if (value > result) {
+        result = value;
+      }
+    }
+    return result;
+  }
+
+  double get mean {
+    assert(isReady);
+    var sum = 0.0;
+    for (final value in _values) {
+      sum += value;
+    }
+    return sum / _values.length;
+  }
+
+  int get min {
+    var result = 1 << 20;
+    for (final value in _values) {
+      if (value < result) {
+        result = value;
+      }
+    }
+    return result;
+  }
+
+  double get standardDeviation {
+    assert(isReady);
+    final mean = this.mean;
+    var sum = 0.0;
+    for (final value in _values) {
+      final diff = value - mean;
+      sum += diff * diff;
+    }
+    return sqrt(sum / _values.length);
+  }
+
+  void add(int value) {
+    _values[_index] = value;
+    _index++;
+    if (_index == _values.length) {
+      _isReady = true;
+    }
+    _index %= _values.length;
+  }
+}

pkg/analyzer/lib/src/dart/analysis/driver.dart

@@ -95,7 +95,7 @@ import 'package:meta/meta.dart';
 // TODO(scheglov): Clean up the list of implicitly analyzed files.
 class AnalysisDriver {
   /// The version of data format, should be incremented on every format change.
-  static const int DATA_VERSION = 351;
+  static const int DATA_VERSION = 353;
 
   /// The number of exception contexts allowed to write. Once this field is
   /// zero, we stop writing any new exception contexts in this process.

pkg/analyzer/lib/src/dart/element/display_string_builder.dart

@@ -71,6 +71,10 @@ class ElementDisplayStringBuilder {
   }
 
   void writeConstructorElement(ConstructorElement element) {
+    if (element.isAugmentation) {
+      _write('augment ');
+    }
+
     _writeType(element.returnType);
     _write(' ');
 
@@ -88,25 +92,17 @@ class ElementDisplayStringBuilder {
   }
 
   void writeEnumElement(EnumElement element) {
+    if (element.isAugmentation) {
+      _write('augment ');
+    }
+
     _write('enum ');
     _write(element.displayName);
     _writeTypeParameters(element.typeParameters);
     _writeTypesIfNotEmpty(' with ', element.mixins);
     _writeTypesIfNotEmpty(' implements ', element.interfaces);
   }
 
-  // void writePropertyAccessor(PropertyAccessorElement element) {
-  //   var variable = element.variable2;
-  //   if (variable == null) {
-  //     // builder.;
-  //   }
-  //
-  //   writeExecutableElement(
-  //     element,
-  //     (element.isGetter ? 'get ' : 'set ') + variable2.displayName,
-  //   );
-  // }
-
   void writeExecutableElement(ExecutableElement element, String name) {
     if (element.isAugmentation) {
       _write('augment ');
@@ -135,6 +131,10 @@ class ElementDisplayStringBuilder {
   }
 
   void writeExtensionElement(ExtensionElement element) {
+    if (element.isAugmentation) {
+      _write('augment ');
+    }
+
     _write('extension');
     if (element.displayName.isNotEmpty) {
       _write(' ');

pkg/analyzer/lib/src/summary2/bundle_reader.dart

@@ -2566,6 +2566,13 @@ class TopLevelVariableElementLinkedData
     );
     element.macroDiagnostics = reader.readMacroDiagnostics();
     element.type = reader.readRequiredType();
+
+    final augmentationTarget = reader.readElement();
+    if (augmentationTarget is TopLevelVariableElementImpl) {
+      augmentationTarget.augmentation = element;
+      element.augmentationTarget = augmentationTarget;
+    }
+
     if (element is ConstTopLevelVariableElementImpl) {
       var initializer = reader._readOptionalExpression();
       if (initializer != null) {

pkg/analyzer/lib/src/summary2/bundle_writer.dart

@@ -636,6 +636,12 @@ class BundleWriter {
     _resolutionSink._writeAnnotationList(element.metadata);
     _resolutionSink.writeMacroDiagnostics(element.macroDiagnostics);
     _resolutionSink.writeType(element.type);
+
+    _resolutionSink.writeElement(element.augmentationTarget);
+    if (element.isAugmentation) {
+      _propertyAugmentations.add(element);
+    }
+
     _resolutionSink._writeOptionalNode(element.constantInitializer);
   }
 

pkg/analyzer/lib/src/summary2/element_builder.dart

@@ -1191,6 +1191,7 @@ class ElementBuilder extends ThrowingAstVisitor<void> {
       }
 
       element.hasInitializer = variable.initializer != null;
+      element.isAugmentation = node.augmentKeyword != null;
       element.isConst = node.variables.isConst;
       element.isExternal = node.externalKeyword != null;
       element.isFinal = node.variables.isFinal;

pkg/analyzer/lib/src/test_utilities/resource_provider_mixin.dart

@@ -6,6 +6,7 @@ import 'dart:io';
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
+import 'package:analyzer/src/test_utilities/package_config_file_builder.dart';
 import 'package:analyzer/src/util/file_paths.dart' as file_paths;
 import 'package:path/path.dart' as path;
 import 'package:path/path.dart';
@@ -146,11 +147,28 @@ mixin ResourceProviderMixin {
     return newFile(path, content);
   }
 
+  File newPackageConfigJsonFileFromBuilder(
+    String directoryPath,
+    PackageConfigFileBuilder builder,
+  ) {
+    final content = builder.toContent(toUriStr: toUriStr);
+    return newPackageConfigJsonFile(directoryPath, content);
+  }
+
   File newPubspecYamlFile(String directoryPath, String content) {
     String path = join(directoryPath, file_paths.pubspecYaml);
     return newFile(path, content);
   }
 
+  void newSinglePackageConfigJsonFile({
+    required String packagePath,
+    required String name,
+  }) {
+    final builder = PackageConfigFileBuilder()
+      ..add(name: name, rootPath: packagePath);
+    newPackageConfigJsonFileFromBuilder(packagePath, builder);
+  }
+
   Uri toUri(String path) {
     path = convertPath(path);
     return resourceProvider.pathContext.toUri(path);