blob: 3ede35d9bc0f5fdef487f7d119d64c0804ec4497 [file] [log] [blame]
// Copyright (c) 2018, 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:analyzer/dart/analysis/analysis_context.dart';
import 'package:analyzer/dart/analysis/context_builder.dart';
import 'package:analyzer/dart/analysis/context_root.dart';
import 'package:analyzer/dart/analysis/declared_variables.dart';
import 'package:analyzer/file_system/file_system.dart';
import 'package:analyzer/file_system/physical_file_system.dart';
import 'package:analyzer/src/context/builder.dart' as old
show ContextBuilder, ContextBuilderOptions;
import 'package:analyzer/src/context/context_root.dart' as old;
import 'package:analyzer/src/dart/analysis/driver.dart'
show AnalysisDriver, AnalysisDriverScheduler;
import 'package:analyzer/src/dart/analysis/driver_based_analysis_context.dart';
import 'package:analyzer/src/dart/analysis/file_state.dart'
show FileContentOverlay;
import 'package:analyzer/src/dart/sdk/sdk.dart';
import 'package:analyzer/src/generated/sdk.dart' show DartSdkManager;
import 'package:analyzer/src/generated/source.dart' show ContentCache;
import 'package:front_end/src/base/performance_logger.dart' show PerformanceLog;
import 'package:front_end/src/byte_store/byte_store.dart' show MemoryByteStore;
import 'package:meta/meta.dart';
* An implementation of a context builder.
class ContextBuilderImpl implements ContextBuilder {
* The resource provider used to access the file system.
final ResourceProvider resourceProvider;
* Initialize a newly created context builder. If a [resourceProvider] is
* given, then it will be used to access the file system, otherwise the
* default resource provider will be used.
ContextBuilderImpl({ResourceProvider resourceProvider})
: resourceProvider =
resourceProvider ?? PhysicalResourceProvider.INSTANCE;
* Return the path to the default location of the SDK, or `null` if the sdk
* cannot be found.
String get _defaultSdkPath =>
AnalysisContext createContext(
{@required ContextRoot contextRoot,
DeclaredVariables declaredVariables,
String sdkPath}) {
PerformanceLog performanceLog = new PerformanceLog(new StringBuffer());
AnalysisDriverScheduler scheduler =
new AnalysisDriverScheduler(performanceLog);
sdkPath ??= _defaultSdkPath;
if (sdkPath == null) {
throw new ArgumentError('Cannot find path to the SDK');
DartSdkManager sdkManager = new DartSdkManager(sdkPath, true);
// TODO(brianwilkerson) Move the required implementation from the old
// ContextBuilder to this class and remove the old class.
old.ContextBuilderOptions options = new old.ContextBuilderOptions();
if (declaredVariables != null) {
options.declaredVariables = _toMap(declaredVariables);
options.defaultPackageFilePath = contextRoot.packagesFile?.path;
old.ContextBuilder builder = new old.ContextBuilder(
resourceProvider, sdkManager, new ContentCache(),
options: options);
builder.analysisDriverScheduler = scheduler;
builder.byteStore = new MemoryByteStore();
builder.fileContentOverlay = new FileContentOverlay();
builder.performanceLog = performanceLog;
old.ContextRoot oldContextRoot = new old.ContextRoot(
contextRoot.root.path, contextRoot.excludedPaths.toList(),
pathContext: resourceProvider.pathContext);
AnalysisDriver driver = builder.buildDriver(oldContextRoot);
// AnalysisDriver reports results into streams.
// We need to drain these streams to avoid memory leak.
DriverBasedAnalysisContext context =
new DriverBasedAnalysisContext(resourceProvider, contextRoot, driver);
return context;
* Convert the [declaredVariables] into a map for use with the old context
* builder.
Map<String, String> _toMap(DeclaredVariables declaredVariables) {
Map<String, String> map = <String, String>{};
for (String name in declaredVariables.variableNames) {
map[name] = declaredVariables.get(name);
return map;