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Unified Diff: sdk/lib/_internal/pub/lib/src/barback/transformer_isolate.dart

Issue 1165473002: Start pulling pub from its own repo. (Closed) Base URL: git@github.com:dart-lang/sdk.git@master
Patch Set: Code review changes Created 5 years, 7 months ago
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Index: sdk/lib/_internal/pub/lib/src/barback/transformer_isolate.dart
diff --git a/sdk/lib/_internal/pub/lib/src/barback/transformer_isolate.dart b/sdk/lib/_internal/pub/lib/src/barback/transformer_isolate.dart
deleted file mode 100644
index e96927901414e69ac5e4418c7e7914dd798a2d7d..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub/lib/src/barback/transformer_isolate.dart
+++ /dev/null
@@ -1,144 +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.transformer_isolate;
-
-import 'dart:async';
-import 'dart:convert';
-import 'dart:isolate';
-
-import 'package:barback/barback.dart';
-import 'package:source_span/source_span.dart';
-import 'package:stack_trace/stack_trace.dart';
-
-import '../../../asset/dart/serialize.dart';
-import '../barback.dart';
-import '../exceptions.dart';
-import '../dart.dart' as dart;
-import '../log.dart' as log;
-import '../utils.dart';
-import 'asset_environment.dart';
-import 'barback_server.dart';
-import 'foreign_transformer.dart';
-import 'transformer_config.dart';
-import 'transformer_id.dart';
-
-/// A wrapper for an isolate from which transformer plugins can be instantiated.
-class TransformerIsolate {
- /// The port used to communicate with the wrapped isolate.
- final SendPort _port;
-
- /// A map indicating the barback server URLs for each [TransformerId] that's
- /// loaded in the wrapped isolate.
- ///
- /// A barback server URL is the URL for the library that the given id
- /// identifies. For example, the URL for "polymer/src/mirrors_remover" might
- /// be "http://localhost:56234/packages/polymer/src/mirrors_remover.dart".
- final Map<TransformerId, Uri> _idsToUrls;
-
- /// The barback mode for this run of pub.
- final BarbackMode _mode;
-
- /// Spawns an isolate that loads all transformer libraries defined by [ids].
- ///
- /// This doesn't actually instantiate any transformers, since a
- /// [TransformerId] doesn't define the transformers' configuration. The
- /// transformers can be constructed using [create].
- ///
- /// If [snapshot] is passed, the isolate will be loaded from that path if it
- /// exists. Otherwise, a snapshot of the isolate's code will be saved to that
- /// path once the isolate is loaded.
- static Future<TransformerIsolate> spawn(AssetEnvironment environment,
- BarbackServer transformerServer, List<TransformerId> ids,
- {String snapshot}) {
- 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/', '');
- return Uri.parse('package:${id.package}/$path');
- });
-
- var code = new StringBuffer();
- code.writeln("import 'dart:isolate';");
-
- for (var url in idsToUrls.values) {
- code.writeln("import '$url';");
- }
-
- code.writeln("import r'package:\$pub/transformer_isolate.dart';");
- code.writeln(
- "void main(_, SendPort replyTo) => loadTransformers(replyTo);");
-
- log.fine("Loading transformers from $ids");
-
- var port = new ReceivePort();
- return dart.runInIsolate(code.toString(), port.sendPort,
- packageRoot: baseUrl.resolve('packages'),
- snapshot: snapshot)
- .then((_) => port.first)
- .then((sendPort) {
- return new TransformerIsolate._(sendPort, environment.mode, idsToUrls);
- }).catchError((error, stackTrace) {
- if (error is! CrossIsolateException) throw error;
- if (error.type != 'IsolateSpawnException') throw error;
-
- // TODO(nweiz): don't parse this as a string once issues 12617 and 12689
- // are fixed.
- var firstErrorLine = error.message.split('\n')[1];
-
- // The isolate error message contains the fully expanded path, not the
- // "package:" URI, so we have to be liberal in what we look for in the
- // error message.
- var missingTransformer = idsToUrls.keys.firstWhere((id) =>
- firstErrorLine.startsWith(
- "Load Error for") &&
- firstErrorLine.contains(idsToUrls[id].path),
- orElse: () => throw error);
- var packageUri = idToPackageUri(idsToAssetIds[missingTransformer]);
-
- // If there was an IsolateSpawnException and the import that actually
- // failed was the one we were loading transformers from, throw an
- // application exception with a more user-friendly message.
- fail('Transformer library "$packageUri" not found.',
- error, stackTrace);
- });
- });
- }
-
- TransformerIsolate._(this._port, this._mode, this._idsToUrls);
-
- /// Instantiate the transformers in the [config.id] with
- /// [config.configuration].
- ///
- /// If there are no transformers defined in the given library, this will
- /// return an empty set.
- Future<Set<Transformer>> create(TransformerConfig config) {
- return call(_port, {
- 'library': _idsToUrls[config.id].toString(),
- 'mode': _mode.name,
- 'configuration': JSON.encode(config.configuration)
- }).then((transformers) {
- transformers = transformers.map(
- (transformer) => deserializeTransformerLike(transformer, config))
- .toSet();
- log.fine("Transformers from $config: $transformers");
- return transformers;
- }).catchError((error, stackTrace) {
- throw new TransformerLoadError(error, config.span);
- });
- }
-}
-
-/// An error thrown when a transformer fails to load.
-class TransformerLoadError extends SourceSpanException
- implements WrappedException {
- final CrossIsolateException innerError;
- Chain get innerChain => innerError.stackTrace;
-
- TransformerLoadError(CrossIsolateException error, SourceSpan span)
- : innerError = error,
- super("Error loading transformer: ${error.message}", span);
-}

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