first incremental cut at editor without packages directories

editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/DartCore.java

 /*
  * Copyright (c) 2012, the Dart project authors.
  * 
  * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
  * 
  * http://www.eclipse.org/legal/epl-v10.html
  * 
  * Unless required by applicable law or agreed to in writing, software distributed under the License
  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
@@ skipping 842 matching lines @@
    * @return <code>true</code> if the given resource should be analyzed
    */
   public static boolean isAnalyzed(IResource resource) {
     return getProjectManager().getIgnoreManager().isAnalyzed(resource);
   }
 
   /**
    * Return true if directory contains a "packages" directory and a "pubspec.yaml" file
    */
   public static boolean isApplicationDirectory(File directory) {
-    return containsPubspecFile(directory) && containsPackagesDirectory(directory);
+    return containsPubspecFile(directory)
+        && (DartCoreDebug.NO_PUB_PACKAGES || containsPackagesDirectory(directory));
   }
 
   /**
    * Return true if directory contains a "packages" directory and a "pubspec.yaml" file
    */
   public static boolean isApplicationDirectory(IContainer container) {
     if (container.getLocation() == null) {
       return false;
     }
 
@@ skipping 172 matching lines @@
     PubFolder pubFolder = DartCore.getProjectManager().getPubFolder(resource);
     if (pubFolder == null) {
       return false;
     }
     IPath pubPath = pubFolder.getResource().getFullPath();
     // check if resource is in "packages"
     IPath resourcePath = resource.getFullPath();
     String[] segments = resourcePath.segments();
     for (int i = 1; i < segments.length - 1; i++) {
       String segment = segments[i];
-      if (segment.equals("packages")) {
+      if (segment.equals(PACKAGES_DIRECTORY_NAME)) {
         return !resourcePath.uptoSegment(i).equals(pubPath);
       }
     }
     // not in "packages"
     return false;
   }
 
   /**
    * @return {@code true} if the given resource is located in the "packages" sub-folder that
    *         corresponds to the enclosing package.
    */
   public static boolean isInSelfLinkedPackageFolder(IResource resource) {
     if (resource == null) {
       return false;
     }
     try {
       // prepare "pub" folder
       PubFolder pubFolder = DartCore.getProjectManager().getPubFolder(resource);
       if (pubFolder == null) {
         return false;
       }
       // the name of the enclosing package
       String packageName = pubFolder.getPubspec().getName();
       // check if resource is in "packages" and references the enclosing package
       String[] segments = resource.getFullPath().segments();
       for (int i = 0; i < segments.length - 1; i++) {
         String segment = segments[i];
-        if (segment.equals("packages") && segments[i + 1].equals(packageName)) {
+        if (segment.equals(PACKAGES_DIRECTORY_NAME) && segments[i + 1].equals(packageName)) {
           return true;
         }
       }
     } catch (Throwable e) {
       // pubFolder.getPubspec() may fail
       return false;
     }
     // not a self-reference
     return false;
   }
@@ skipping 656 matching lines @@
         String metricsInfo = writer.toString();
         if (metricsInfo.length() > 0) {
           getLog().log(new Status(Status.INFO, PLUGIN_ID, metricsInfo, null));
         }
       }
     } finally {
       super.stop(context);
     }
   }
 }