Create new error message for missing generated files

pkg/analyzer/lib/src/task/dart.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.
 
 library analyzer.src.task.dart;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
@@ skipping 6425 matching lines @@
       if (modificationTime >= 0) {
         return;
       }
     } else {
       // Don't report errors already reported by ParseDartTask.resolveDirective
       if (directive.validate() != null) {
         return;
       }
     }
     StringLiteral uriLiteral = directive.uri;
-    errorReporter.reportErrorForNode(CompileTimeErrorCode.URI_DOES_NOT_EXIST,
-        uriLiteral, [directive.uriContent]);
+    CompileTimeErrorCode errorCode = CompileTimeErrorCode.URI_DOES_NOT_EXIST;
+    if (_isGenerated(source)) {
+      errorCode = CompileTimeErrorCode.URI_HAS_NOT_BEEN_GENERATED;
+    }
+    errorReporter
+        .reportErrorForNode(errorCode, uriLiteral, [directive.uriContent]);
   }
 
   /**
+   * Return `true` if the given [source] refers to a file that is assumed to be
+   * generated.
+   */
+  bool _isGenerated(Source source) {
+    if (source == null) {
+      return false;
+    }
+    // TODO(brianwilkerson) Generalize this mechanism.
+    List<String> suffixes = <String>[

[scheglov, 2016/08/10 19:12:15]

const const

[Brian Wilkerson, 2016/08/10 19:42:02]

Done

+      '.g.dart',
+      '.pb.dart',
+      '.pbenum.dart',
+      '.pbserver.dart',
+      '.pbjson.dart',
+      '.template.dart'
+    ];
+    String fullName = source.fullName;
+    for (String suffix in suffixes) {
+      if (fullName.endsWith(suffix)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  /**
    * Return a map from the names of the inputs of this kind of task to the task
    * input descriptors describing those inputs for a task with the
    * given [target].
    */
   static Map<String, TaskInput> buildInputs(AnalysisTarget target) {
     LibrarySpecificUnit unit = target;
     return <String, TaskInput>{
       'thisLibraryClosureIsReady': READY_RESOLVED_UNIT.of(unit.library),
       UNIT_INPUT: RESOLVED_UNIT.of(unit),
       REFERENCED_SOURCE_MODIFICATION_TIME_MAP_INPUT:
@@ skipping 122 matching lines @@
 
   @override
   bool moveNext() {
     if (_newSources.isEmpty) {
       return false;
     }
     currentTarget = _newSources.removeLast();
     return true;
   }
 }