Fasta infrastructure.

pkg/fasta/lib/src/translate_uri.dart

Index: pkg/fasta/lib/src/translate_uri.dart
diff --git a/pkg/fasta/lib/src/translate_uri.dart b/pkg/fasta/lib/src/translate_uri.dart
new file mode 100644
index 0000000000000000000000000000000000000000..a770abdc7c13cbb6b400fa26f38d9e303a3d2ba6
--- /dev/null
+++ b/pkg/fasta/lib/src/translate_uri.dart
@@ -0,0 +1,85 @@
+// Copyright (c) 2016, 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 fasta.translate_uri;
+
+import 'dart:async' show
+    Future;
+
+import 'dart:io' show
+    File;
+
+import 'package:package_config/packages_file.dart' as packages_file
+    show parse;
+
+class TranslateUri {
+  final Map<String, Uri> packages;
+
+  TranslateUri(this.packages);
+
+  Uri translate(Uri uri) {
+    if (uri.scheme == "dart") return translateDartUri(uri);
+    if (uri.scheme == "package") return translatePackageUri(uri);
+    return null;
+  }
+
+  Uri translateDartUri(Uri uri) {
+    String path = uriTranslation["$uri"];
+    return path == null ? null : Uri.base.resolve(path);
+  }
+
+  Uri translatePackageUri(Uri uri) {
+    int index = uri.path.indexOf("/");
+    if (index == -1) return null;
+    String name = uri.path.substring(0, index);
+    String path = uri.path.substring(index + 1);
+    Uri root = packages[name];
+    if (root == null) return null;
+    return root.resolve(path);
+  }
+
+  static Future<TranslateUri> parse([Uri uri]) async {
+    uri ??= Uri.base.resolve(".packages");
+    File file = new File.fromUri(uri);
+    List<int> bytes = await file.readAsBytes();
+    Map<String, Uri> packages = packages_file.parse(bytes, uri);
+    return new TranslateUri(packages);
+  }
+}
+
+// TODO(ahe): This is a quick hack to avoid hooking up SDK library resolution.
+const Map<String, String> uriTranslation = const <String, String>{
+    "dart:async": "dart-sdk/sdk/lib/async/async.dart",
+    "dart:_chrome": "dart-sdk/sdk/lib/_chrome/dart2js/chrome_dart2js.dart",
+    "dart:collection": "dart-sdk/sdk/lib/collection/collection.dart",
+    "dart:convert": "dart-sdk/sdk/lib/convert/convert.dart",
+    "dart:core": "dart-sdk/sdk/lib/core/core.dart",
+    "dart:developer": "dart-sdk/sdk/lib/developer/developer.dart",
+    "dart:html": "dart-sdk/sdk/lib/html/dart2js/html_dart2js.dart",
+    "dart:html_common": "dart-sdk/sdk/lib/html/html_common/html_common_dart2js.dart",

[Johnni Winther, 2017/01/16 09:47:46]

Long lines

[ahe, 2017/01/16 12:07:04]

Removed, not used anymore.

+    "dart:indexed_db": "dart-sdk/sdk/lib/indexed_db/dart2js/indexed_db_dart2js.dart",
+    "dart:io": "dart-sdk/sdk/lib/io/io.dart",
+    "dart:isolate": "dart-sdk/sdk/lib/isolate/isolate.dart",
+    "dart:js": "dart-sdk/sdk/lib/js/dart2js/js_dart2js.dart",
+    "dart:js_util": "dart-sdk/sdk/lib/js_util/dart2js/js_util_dart2js.dart",
+    "dart:math": "dart-sdk/sdk/lib/math/math.dart",
+    "dart:mirrors": "dart-sdk/sdk/lib/mirrors/mirrors.dart",
+    "dart:typed_data": "dart-sdk/sdk/lib/typed_data/typed_data.dart",
+    "dart:_native_typed_data": "dart-sdk/sdk/lib/_internal/js_runtime/lib/native_typed_data.dart",
+    "dart:svg": "dart-sdk/sdk/lib/svg/dart2js/svg_dart2js.dart",
+    "dart:web_audio": "dart-sdk/sdk/lib/web_audio/dart2js/web_audio_dart2js.dart",
+    "dart:web_gl": "dart-sdk/sdk/lib/web_gl/dart2js/web_gl_dart2js.dart",
+    "dart:web_sql": "dart-sdk/sdk/lib/web_sql/dart2js/web_sql_dart2js.dart",
+    "dart:_internal": "dart-sdk/sdk/lib/internal/internal.dart",
+    "dart:_js_helper": "dart-sdk/sdk/lib/_internal/js_runtime/lib/js_helper.dart",
+    "dart:_interceptors": "dart-sdk/sdk/lib/_internal/js_runtime/lib/interceptors.dart",
+    "dart:_foreign_helper": "dart-sdk/sdk/lib/_internal/js_runtime/lib/foreign_helper.dart",
+    "dart:_isolate_helper": "dart-sdk/sdk/lib/_internal/js_runtime/lib/isolate_helper.dart",
+    "dart:_js_mirrors": "dart-sdk/sdk/lib/_internal/js_runtime/lib/js_mirrors.dart",
+    "dart:_js_names": "dart-sdk/sdk/lib/_internal/js_runtime/lib/js_names.dart",
+    "dart:_js_primitives": "dart-sdk/sdk/lib/_internal/js_runtime/lib/js_primitives.dart",
+    "dart:_js_embedded_names": "dart-sdk/sdk/lib/_internal/js_runtime/lib/shared/embedded_names.dart",
+    "dart:_async_await_error_codes": "dart-sdk/sdk/lib/_internal/js_runtime/lib/shared/async_await_error_codes.dart",
+    "dart:_metadata": "dart-sdk/sdk/lib/html/html_common/metadata.dart",
+};