Support native extensions for analysis and docgen.

pkg/compiler/lib/src/apiimpl.dart

 // Copyright (c) 2012, 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 leg_apiimpl;
 
 import 'dart:async';
 
 import '../compiler.dart' as api;
 import 'dart2jslib.dart' as leg;
@@ skipping 60 matching lines @@
             buildId: extractStringOption(
                 options, '--build-id=',
                 "build number could not be determined"),
             showPackageWarnings:
                 hasOption(options, '--show-package-warnings'),
             useContentSecurityPolicy: hasOption(options, '--csp'),
             hasIncrementalSupport:
                 forceIncrementalSupport ||
                 hasOption(options, '--incremental-support'),
             suppressWarnings: hasOption(options, '--suppress-warnings'),
-            enableAsyncAwait: hasOption(options, '--enable-async')) {
+            enableAsyncAwait: hasOption(options, '--enable-async'),
+            allowNativeExtensions:
+                hasOption(options, '--allow-native-extensions')) {
     tasks.addAll([
         userHandlerTask = new leg.GenericTask('Diagnostic handler', this),
         userProviderTask = new leg.GenericTask('Input provider', this),
     ]);
     if (!libraryRoot.path.endsWith("/")) {
       throw new ArgumentError("libraryRoot must end with a /");
     }
     if (packageRoot != null && !packageRoot.path.endsWith("/")) {
       throw new ArgumentError("packageRoot must end with a /");
     }
-    if (enableAsyncAwait && !analyzeOnly) {
-      throw new ArgumentError(
-          "--enable-async is currently only supported with --analyze-only");
+    if (!analyzeOnly) {
+      if (enableAsyncAwait) {
+        throw new ArgumentError(
+            "--enable-async is currently only supported with --analyze-only");
+      }
+      if (allowNativeExtensions) {
+        throw new ArgumentError(
+            "--allow-native-extensions is only supported with in combination "

[floitsch, 2014/11/21 13:26:11]

-with-

[Johnni Winther, 2014/11/21 13:51:15]

Done.

+            "with --analyze-only");
+      }
     }
   }
 
   static String extractStringOption(List<String> options,
                                     String prefix,
                                     String defaultValue) {
     for (String option in options) {
       if (option.startsWith(prefix)) {
         return option.substring(prefix.length);
       }
@@ skipping 82 matching lines @@
     elements.Element element = currentElement;
     void reportReadError(exception) {
       withCurrentElement(element, () {
         reportError(node,
                     leg.MessageKind.READ_SCRIPT_ERROR,
                     {'uri': readableUri, 'exception': exception});
       });
     }
 
     Uri resourceUri = translateUri(node, readableUri);
+    String resourceUriString = resourceUri.toString();
+    if (resourceUri.scheme == 'dart-ext') {
+      if (!allowNativeExtensions) {
+        withCurrentElement(element, () {
+          reportError(node, leg.MessageKind.DART_EXT_NOT_SUPPORTED);
+        });
+      }
+      return new Future.value(new leg.Script(readableUri, resourceUri,
+          new StringSourceFile(resourceUriString,
+              "// Synthetic source file generated for '$readableUri'.")));
+    }
+
     // TODO(johnniwinther): Wrap the result from [provider] in a specialized
     // [Future] to ensure that we never execute an asynchronous action without
     // setting up the current element of the compiler.
     return new Future.sync(() => callUserProvider(resourceUri)).then((data) {
       SourceFile sourceFile;
-      String resourceUriString = resourceUri.toString();
       if (data is List<int>) {
         sourceFile = new Utf8BytesSourceFile(resourceUriString, data);
       } else if (data is String) {
         sourceFile = new StringSourceFile(resourceUriString, data);
       } else {
         String message = "Expected a 'String' or a 'List<int>' from the input "
                          "provider, but got: ${Error.safeToString(data)}.";
         reportReadError(message);
       }
       // We use [readableUri] as the URI for the script since need to preserve
@@ skipping 141 matching lines @@
   }
 
   void diagnoseCrashInUserCode(String message, exception, stackTrace) {
     hasCrashed = true;
     print('$message: ${tryToString(exception)}');
     print(tryToString(stackTrace));
   }
 
   fromEnvironment(String name) => environment[name];
 }