Remove IncrementalResolvedAstGenerator.

pkg/front_end/lib/src/incremental_resolved_ast_generator_impl.dart

Index: pkg/front_end/lib/src/incremental_resolved_ast_generator_impl.dart
diff --git a/pkg/front_end/lib/src/incremental_resolved_ast_generator_impl.dart b/pkg/front_end/lib/src/incremental_resolved_ast_generator_impl.dart
deleted file mode 100644
index 095c30871289a2e61b23a92e32ae31430e2981c6..0000000000000000000000000000000000000000
--- a/pkg/front_end/lib/src/incremental_resolved_ast_generator_impl.dart
+++ /dev/null
@@ -1,303 +0,0 @@
-// Copyright (c) 2017, 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:async';
-
-import 'package:analyzer/dart/ast/ast.dart';
-import 'package:analyzer/file_system/file_system.dart';
-import 'package:analyzer/src/context/context.dart';
-import 'package:analyzer/src/dart/analysis/driver.dart' as driver;
-import 'package:analyzer/src/dart/analysis/file_state.dart';
-import 'package:analyzer/src/generated/engine.dart';
-import 'package:analyzer/src/generated/sdk.dart';
-import 'package:analyzer/src/generated/source.dart';
-import 'package:analyzer/src/summary/idl.dart';
-import 'package:analyzer/src/util/absolute_path.dart';
-import 'package:front_end/incremental_resolved_ast_generator.dart';
-import 'package:front_end/src/base/file_repository.dart';
-import 'package:front_end/src/base/performace_logger.dart';
-import 'package:front_end/src/base/processed_options.dart';
-import 'package:front_end/src/base/resolve_relative_uri.dart';
-import 'package:front_end/src/base/source.dart';
-import 'package:front_end/src/dependency_grapher_impl.dart';
-import 'package:front_end/src/incremental/byte_store.dart';
-import 'package:path/src/context.dart';
-
-dynamic unimplemented() {
-  // TODO(paulberry): get rid of this.
-  throw new UnimplementedError();
-}
-
-/// Implementation of [IncrementalKernelGenerator].
-///
-/// Theory of operation: this class is a thin wrapper around
-/// [driver.AnalysisDriver].  When the client requests a new delta, we forward
-/// the request to the analysis driver.  When the client calls an invalidate
-/// method, we ensure that the proper files will be re-read next time a delta is
-/// requested.
-///
-/// Note that the analysis driver expects to be able to read file contents
-/// synchronously based on filesystem path rather than asynchronously based on
-/// URI, so the file contents are first read into memory using the asynchronous
-/// FileSystem API, and then these are fed into the analysis driver using a
-/// proxy implementation of [ResourceProvider].  TODO(paulberry): make this (and
-/// other proxies in this file) unnecessary.
-class IncrementalResolvedAstGeneratorImpl
-    implements IncrementalResolvedAstGenerator {
-  driver.AnalysisDriverScheduler _scheduler;
-  final _fileRepository = new FileRepository();
-  _ResourceProviderProxy _resourceProvider;
-  driver.AnalysisDriver _driver;
-  bool _isInitialized = false;
-  final ProcessedOptions _options;
-  final Uri _source;
-  bool _schedulerStarted = false;
-  final _fileState = <Uri, String>{};
-
-  IncrementalResolvedAstGeneratorImpl(this._source, this._options);
-
-  @override
-  Future<DeltaLibraries> computeDelta() async {
-    if (!_isInitialized) {
-      await init();
-    }
-    // The analysis driver doesn't currently support an asynchronous file API,
-    // so we have to find all the files first to read their contents.
-    // TODO(paulberry): this is an unnecessary source of duplicate work and
-    // should be eliminated ASAP.
-    var graph =
-        await graphForProgram([_source], _options, fileReader: _fileReader);
-    // TODO(paulberry): collect no-longer-referenced files from _fileState and
-    // _fileRepository.
-    var libraries = <Uri, Map<Uri, CompilationUnit>>{};
-    if (!_schedulerStarted) {
-      _scheduler.start();
-      _schedulerStarted = true;
-    }
-    for (var libraryCycle in graph.topologicallySortedCycles) {
-      for (var libraryUri in libraryCycle.libraries.keys) {
-        var libraryNode = libraryCycle.libraries[libraryUri];
-        for (var partUri in libraryNode.parts) {
-          // TODO(paulberry): resolve the part URI.
-          _fileReader(partUri, partUri);
-        }
-      }
-      for (var libraryUri in libraryCycle.libraries.keys) {
-        var libraryNode = libraryCycle.libraries[libraryUri];
-        var result =
-            await _driver.getResult(_fileRepository.pathForUri(libraryUri));
-        // TODO(paulberry): handle errors.
-        var units = {libraryUri: result.unit};
-        for (var partUri in libraryNode.parts) {
-          // Really we ought to have a driver API that lets us request a
-          // specific part of a given library.  Otherwise we will run into
-          // problems if a part is included in multiple libraries.
-          // TODO(paulberry): address this.
-          var partResult =
-              await _driver.getResult(_fileRepository.pathForUri(partUri));
-          // TODO(paulberry): handle errors.
-          units[partUri] = partResult.unit;
-        }
-        libraries[libraryUri] = units;
-      }
-    }
-    _driver.addFile(_fileRepository.pathForUri(_source));
-    // TODO(paulberry): stop the scheduler
-    return new DeltaLibraries(libraries);
-  }
-
-  Future<Null> init() async {
-    // TODO(paulberry): can we just use null?
-    var performanceLog = new PerformanceLog(new _NullStringSink());
-    _scheduler = new driver.AnalysisDriverScheduler(performanceLog);
-    _resourceProvider = new _ResourceProviderProxy(_fileRepository);
-    // TODO(paulberry): MemoryByteStore leaks memory (it never discards data).
-    // Do something better here.
-    var byteStore = new MemoryByteStore();
-    // TODO(paulberry): can we just use null?
-    var fileContentOverlay = new FileContentOverlay();
-    var sdkContext = new AnalysisContextImpl();
-    var sdkBundle = await _options.getSdkSummary();
-    var dartSdk = new _DartSdkProxy(sdkBundle, sdkContext, _fileRepository);
-    sdkContext.sourceFactory =
-        new SourceFactory([new DartUriResolver(dartSdk)]);
-
-    var sourceFactory = new _SourceFactoryProxy(dartSdk, _fileRepository);
-    var analysisOptions = new AnalysisOptionsImpl();
-    _driver = new driver.AnalysisDriver(
-        _scheduler,
-        performanceLog,
-        _resourceProvider,
-        byteStore,
-        fileContentOverlay,
-        null,
-        sourceFactory,
-        analysisOptions,
-        sdkBundle: sdkBundle);
-    _isInitialized = true;
-  }
-
-  @override
-  void invalidate(String path) {
-    throw new UnimplementedError();
-  }
-
-  @override
-  void invalidateAll() {
-    _fileState.clear();
-    _fileRepository.clearContents();
-    // TODO(paulberry): verify that this has an effect (requires a multi-file
-    // test).
-    if (_isInitialized) {
-      _driver.knownFiles.forEach(_driver.changeFile);
-    }
-  }
-
-  Future<String> _fileReader(Uri originalUri, Uri resolvedUri) async {
-    String contents = _fileState[resolvedUri] ??=
-        await _options.fileSystem.entityForUri(resolvedUri).readAsString();
-    _fileRepository.store(originalUri, contents);
-    return contents;
-  }
-}
-
-class _DartSdkProxy implements DartSdk {
-  final PackageBundle summary;
-
-  final AnalysisContext context;
-
-  final FileRepository _fileRepository;
-
-  _DartSdkProxy(this.summary, this.context, this._fileRepository);
-
-  @override
-  PackageBundle getLinkedBundle() => summary;
-
-  @override
-  Source mapDartUri(String uriString) {
-    var uri = Uri.parse(uriString);
-    return new _SourceProxy(
-        uri, _fileRepository.pathForUri(uri, allocate: true));
-  }
-
-  noSuchMethod(Invocation invocation) => unimplemented();
-}
-
-class _FileProxy implements File {
-  final _SourceProxy _source;
-
-  final _ResourceProviderProxy _resourceProvider;
-
-  _FileProxy(this._source, this._resourceProvider);
-
-  @override
-  String get path => _source.fullName;
-
-  @override
-  String get shortName => path;
-
-  @override
-  Source createSource([Uri uri]) {
-    assert(uri == null);
-    return _source;
-  }
-
-  noSuchMethod(Invocation invocation) => unimplemented();
-
-  @override
-  String readAsStringSync() {
-    return _resourceProvider._fileRepository.contentsForPath(path);
-  }
-}
-
-/// A string sink that ignores everything written to it.
-class _NullStringSink implements StringSink {
-  void write(Object obj) {}
-  void writeAll(Iterable objects, [String separator = ""]) {}
-  void writeCharCode(int charCode) {}
-  void writeln([Object obj = ""]) {}
-}
-
-class _ResourceProviderProxy implements ResourceProvider {
-  final FileRepository _fileRepository;
-
-  _ResourceProviderProxy(this._fileRepository);
-
-  @override
-  AbsolutePathContext get absolutePathContext => throw new UnimplementedError();
-
-  @override
-  Context get pathContext => throw new UnimplementedError();
-
-  @override
-  File getFile(String path) {
-    return new _FileProxy(
-        new _SourceProxy(_fileRepository.uriForPath(path), path), this);
-  }
-
-  @override
-  Folder getFolder(String path) => throw new UnimplementedError();
-
-  @override
-  Future<List<int>> getModificationTimes(List<Source> sources) =>
-      throw new UnimplementedError();
-
-  @override
-  Resource getResource(String path) => throw new UnimplementedError();
-
-  @override
-  Folder getStateLocation(String pluginId) => throw new UnimplementedError();
-}
-
-class _SourceFactoryProxy implements SourceFactory {
-  @override
-  final DartSdk dartSdk;
-
-  final FileRepository _fileRepository;
-
-  @override
-  AnalysisContext context;
-
-  _SourceFactoryProxy(this.dartSdk, this._fileRepository);
-
-  @override
-  SourceFactory clone() => new _SourceFactoryProxy(dartSdk, _fileRepository);
-
-  @override
-  Source forUri(String absoluteUri) {
-    Uri uri = Uri.parse(absoluteUri);
-    return forUri2(uri);
-  }
-
-  @override
-  Source forUri2(Uri absoluteUri) {
-    return new _SourceProxy(
-        absoluteUri, _fileRepository.pathForUri(absoluteUri, allocate: true));
-  }
-
-  noSuchMethod(Invocation invocation) => unimplemented();
-
-  Source resolveUri(Source containingSource, String containedUri) {
-    // TODO(paulberry): re-use code from dependency_grapher_impl, and support
-    // SDK URI resolution logic.
-    String absoluteUri =
-        resolveRelativeUri(containingSource?.uri, Uri.parse(containedUri))
-            .toString();
-    return forUri(absoluteUri);
-  }
-
-  @override
-  Uri restoreUri(Source source) => source.uri;
-}
-
-class _SourceProxy extends BasicSource {
-  @override
-  final String fullName;
-
-  _SourceProxy(Uri uri, this.fullName) : super(uri);
-
-  int get modificationStamp => 0;
-
-  noSuchMethod(Invocation invocation) => unimplemented();
-}