use Source.isInSystemLibrary

lib/src/compiler.dart

 // Copyright (c) 2015, 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.
 
 /// Command line tool to run the checker on a Dart program.
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:convert' show JSON;
 import 'dart:math' as math;
@@ skipping 148 matching lines @@
     // _pendingLibraries was recorded in post-order.  Process from the end
     // to ensure reverse post-order.  This will ensure that we handle back
     // edges from the original depth-first search correctly.
 
     while (_pendingLibraries.isNotEmpty) {
       var unit = _pendingLibraries.removeLast();
       var library = unit.library.element.enclosingElement;
       assert(_compilationRecord[library] == true ||
           options.codegenOptions.forceCompile);
 
-      // Process dependences one more time to propagate failure from cycles
+      // Process dependencies one more time to propagate failure from cycles
       for (var import in library.imports) {
         if (!_compilationRecord[import.importedLibrary]) {
           _compilationRecord[library] = false;
         }
       }
       for (var export in library.exports) {
         if (!_compilationRecord[export.exportedLibrary]) {
           _compilationRecord[library] = false;
         }
       }
@@ skipping 10 matching lines @@
   bool _compileLibrary(LibraryElement library, CompilationNotifier notifier) {
     var success = _compilationRecord[library];
     if (success != null) {
       if (!success) _failure = true;
       return success;
     }
 
     // Optimistically mark a library valid until proven otherwise
     _compilationRecord[library] = true;
 
-    if (!options.checkSdk && library.source.uri.scheme == 'dart') {
+    if (!options.checkSdk && library.source.isInSystemLibrary) {
       // We assume the Dart SDK is always valid
       if (_jsGen != null) _copyDartRuntime();
       return true;
     }
 
     // Check dependences to determine if this library type checks
     // TODO(jmesserly): in incremental mode, we can skip the transitive
     // compile of imports/exports.
     _compileLibrary(_dartCore, notifier); // implicit dart:core dependency
     for (var import in library.imports) {
@@ skipping 230 matching lines @@
       return filepath;
     }
   }
 
   /// Log any errors encountered when resolving [source] and return whether any
   /// errors were found.
   bool computeErrors(Source source) {
     AnalysisContext errorContext = context;
     // TODO(jmesserly): should this be a fix somewhere in analyzer?
     // otherwise we fail to find the parts.
-    if (source.uri.scheme == 'dart') {
+    if (source.isInSystemLibrary) {
       errorContext = context.sourceFactory.dartSdk.context;
     }
     List<AnalysisError> errors = errorContext.computeErrors(source);
     bool failure = false;
     for (var error in errors) {
       ErrorCode code = error.errorCode;
       // Always skip TODOs.
       if (code.type == ErrorType.TODO) continue;
 
       // TODO(jmesserly): for now, treat DDC errors as having a different
@@ skipping 71 matching lines @@
   var files = [
     'harmony_feature_check.js',
     'dart_library.js',
     'dart/_runtime.js',
   ];
   files.addAll(corelibOrder.map(coreToFile));
   return files;
 }();
 
 final _log = new Logger('dev_compiler.src.compiler');