Load instances of the same transformer from the same isolate.

sdk/lib/_internal/pub/lib/src/barback/load_transformers.dart

Index: sdk/lib/_internal/pub/lib/src/barback/load_transformers.dart
diff --git a/sdk/lib/_internal/pub/lib/src/barback/load_transformers.dart b/sdk/lib/_internal/pub/lib/src/barback/load_transformers.dart
deleted file mode 100644
index 50e754be0d346b81c6a1f6c170b729c600e5607f..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub/lib/src/barback/load_transformers.dart
+++ /dev/null
@@ -1,88 +0,0 @@
-// Copyright (c) 2013, 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 pub.load_transformers;
-
-import 'dart:async';
-import 'dart:convert';
-import 'dart:isolate';
-
-import '../../../asset/dart/serialize.dart';
-import '../barback.dart';
-import '../dart.dart' as dart;
-import '../log.dart' as log;
-import '../utils.dart';
-import 'asset_environment.dart';
-import 'foreign_transformer.dart';
-import 'barback_server.dart';
-
-/// Load and return all transformers and groups from the libraries identified by
-/// [ids].
-///
-/// Returns a map from transformer ids to sets of transformer-like objects
-/// identified by these ids (these may be [Transformer]s,
-/// [AggregateTransformer]s, and/or [TransformerGroup]s).
-Future<Map<TransformerId, Set>> loadTransformers(AssetEnvironment environment,
-    BarbackServer transformerServer, List<TransformerId> ids) {
-  return mapFromIterableAsync(ids, value: (id) {
-    return id.getAssetId(environment.barback);
-  }).then((idsToAssetIds) {
-    var baseUrl = transformerServer.url;
-    var idsToUrls = mapMap(idsToAssetIds, value: (id, assetId) {
-      var path = assetId.path.replaceFirst('lib/', '');
-      // TODO(nweiz): load from a "package:" URI when issue 12474 is fixed.
-      return baseUrl.resolve('packages/${id.package}/$path');
-    });
-
-    var code = new StringBuffer();
-    code.writeln("import 'dart:isolate';");
-
-    for (var url in idsToUrls.values) {
-      code.writeln("import '$url';");
-    }
-
-    code.writeln("import r'$baseUrl/packages/\$pub/transformer_isolate.dart';");
-    code.writeln(
-        "void main(_, SendPort replyTo) => loadTransformers(replyTo);");
-
-    log.fine("Loading transformers from $ids");
-
-    var port = new ReceivePort();
-    return dart.runInIsolate(code.toString(), port.sendPort)
-        .then((_) => port.first)
-        .then((sendPort) {
-      return mapMapAsync(idsToAssetIds, value: (id, assetId) {
-        return call(sendPort, {
-          'library': idsToUrls[id].toString(),
-          'mode': environment.mode.name,
-          // TODO(nweiz): support non-JSON-encodable configuration maps.
-          'configuration': JSON.encode(id.configuration)
-        }).then((transformers) {
-          transformers = transformers.map(
-              (transformer) => deserializeTransformerLike(transformer, id))
-              .toSet();
-          log.fine("Transformers from $assetId: $transformers");
-          return transformers;
-        });
-      });
-    }).catchError((error, stackTrace) {
-      if (error is! CrossIsolateException) throw error;
-      if (error.type != 'IsolateSpawnException') throw error;
-
-      // TODO(nweiz): don't parse this as a string once issues 12617 and 12689
-      // are fixed.
-      var firstErrorLine = error.message.split('\n')[1];
-      var missingTransformer = idsToUrls.keys.firstWhere((id) =>
-              firstErrorLine.startsWith("Failure getting ${idsToUrls[id]}:"),
-          orElse: () => throw error);
-      var packageUri = idToPackageUri(idsToAssetIds[missingTransformer]);
-
-      // If there was an IsolateSpawnException and the import that actually
-      // failed was the one we were loading transformers from, throw an
-      // application exception with a more user-friendly message.
-      fail('Transformer library "$packageUri" not found.',
-          error, stackTrace);
-    });
-  });
-}