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code_transformers/lib/src/resolvers.dart

Index: code_transformers/lib/src/resolvers.dart
diff --git a/code_transformers/lib/src/resolvers.dart b/code_transformers/lib/src/resolvers.dart
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index fa2f953cdd1d88db33b0ce8332c0e8491e5e5796..0000000000000000000000000000000000000000
--- a/code_transformers/lib/src/resolvers.dart
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-// Copyright (c) 2014, 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.
-
-library code_transformers.src.resolvers;
-
-import 'dart:async';
-import 'package:barback/barback.dart';
-
-import 'package:analyzer/src/generated/engine.dart' show AnalysisOptions;
-import 'package:analyzer/src/generated/sdk.dart' show DartSdk;
-import 'package:analyzer/src/generated/source.dart' show DartUriResolver;
-
-import 'entry_point.dart';
-import 'resolver.dart';
-import 'resolver_impl.dart';
-import 'dart_sdk.dart' hide dartSdkDirectory;
-
-/// Barback-based code resolvers which maintains up-to-date resolved ASTs for
-/// the specified code entry points.
-///
-/// This can used by transformers dependent on resolved ASTs to handle the
-/// resolution of the AST and cache the results between compilations.
-///
-/// If multiple transformers rely on a resolved AST they should (ideally) share
-/// the same Resolvers object to minimize re-parsing the AST.
-class Resolvers {
-  final Map<AssetId, Resolver> _resolvers = {};
-  final DartSdk dartSdk;
-  final DartUriResolver dartUriResolver;
-  final AnalysisOptions options;
-
-  Resolvers.fromSdk(this.dartSdk, this.dartUriResolver, {this.options});
-
-  factory Resolvers(dartSdkDirectory, {AnalysisOptions options}) {
-    var sdk = new DirectoryBasedDartSdkProxy(dartSdkDirectory);
-    var uriResolver = new DartUriResolverProxy(sdk);
-    return new Resolvers.fromSdk(sdk, uriResolver, options: options);
-  }
-
-  factory Resolvers.fromMock(Map<String, String> sources,
-      {bool reportMissing: false, AnalysisOptions options}) {
-    var sdk = new MockDartSdk(sources, reportMissing: reportMissing);
-    return new Resolvers.fromSdk(sdk, sdk.resolver, options: options);
-  }
-
-  /// Get a resolver for [transform]. If provided, this resolves the code
-  /// starting from each of the assets in [entryPoints]. If not, this resolves
-  /// the code starting from `transform.primaryInput.id` by default.
-  ///
-  /// [Resolver.release] must be called once it's done being used, or
-  /// [ResolverTransformer] should be used to automatically release the
-  /// resolver.
-  Future<Resolver> get(Transform transform, [List<AssetId> entryPoints]) {
-    var id = transform.primaryInput.id;
-    var resolver = _resolvers.putIfAbsent(
-        id, () => new ResolverImpl(dartSdk, dartUriResolver, options: options));
-    return resolver.resolve(transform, entryPoints);
-  }
-}
-
-/// Transformer mixin which automatically gets and releases resolvers.
-///
-/// To use mix this class in, set the resolvers field and override
-/// [applyResolver].
-abstract class ResolverTransformer implements Transformer {
-  /// The cache of resolvers- must be set from subclass.
-  Resolvers resolvers;
-
-  /// By default only process prossible entry point assets.
-  ///
-  /// This is only a preliminary check based on the asset ID.
-  Future<bool> isPrimary(assetOrId) {
-    // assetOrId is to handle the transition from Asset to AssetID between
-    // pub 1.3 and 1.4. Once support for 1.3 is dropped this should only
-    // support AssetId.
-    var id = assetOrId is AssetId ? assetOrId : assetOrId.id;
-    return new Future.value(isPossibleDartEntryId(id));
-  }
-
-  /// Check to see if this should apply with the resolver on the provided asset.
-  ///
-  /// By default this will only apply on possible Dart entry points (see
-  /// [isPossibleDartEntry]).
-  Future<bool> shouldApplyResolver(Asset asset) => isPossibleDartEntry(asset);
-
-  /// This provides a default implementation of `Transformer.apply` that will
-  /// get and release resolvers automatically. Internally this:
-  ///   * Gets a resolver associated with the transform primary input.
-  ///   * Does resolution to the code starting from that input.
-  ///   * Calls [applyResolver].
-  ///   * Then releases the resolver.
-  ///
-  /// Use [applyToEntryPoints] instead if you need to override the entry points
-  /// to run the resolver on.
-  Future apply(Transform transform) =>
-      shouldApplyResolver(transform.primaryInput).then((result) {
-    if (result) return applyToEntryPoints(transform);
-  });
-
-  /// Helper function to make it easy to write an `Transformer.apply` method
-  /// that automatically gets and releases the resolver. This is typically used
-  /// as follows:
-  ///
-  ///    Future apply(Transform transform) {
-  ///       var entryPoints = ...; // compute entry points
-  ///       return applyToEntryPoints(transform, entryPoints);
-  ///    }
-  Future applyToEntryPoints(Transform transform, [List<AssetId> entryPoints]) {
-    return resolvers.get(transform, entryPoints).then((resolver) {
-      return new Future(() => applyResolver(transform, resolver)).whenComplete(
-          () {
-        resolver.release();
-      });
-    });
-  }
-
-  /// Invoked when the resolver is ready to be processed.
-  ///
-  /// Return a Future to indicate when apply is completed.
-  applyResolver(Transform transform, Resolver resolver);
-}