first incremental cut at editor without packages directories

editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/pub/PubBuildParticipant.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
  * or implied. See the License for the specific language governing permissions and limitations under
  * the License.
  */
 package com.google.dart.tools.core.pub;
 
 import com.google.common.annotations.VisibleForTesting;
 import com.google.dart.tools.core.DartCore;
+import com.google.dart.tools.core.DartCoreDebug;
 import com.google.dart.tools.core.MessageConsole;
 import com.google.dart.tools.core.analysis.model.PubFolder;
 import com.google.dart.tools.core.builder.BuildEvent;
 import com.google.dart.tools.core.builder.BuildParticipant;
 import com.google.dart.tools.core.builder.BuildVisitor;
 import com.google.dart.tools.core.builder.CleanEvent;
 import com.google.dart.tools.core.internal.builder.DartBuilder;
 import com.google.dart.tools.core.utilities.yaml.PubYamlUtils;
 
 import org.eclipse.core.resources.IContainer;
@@ skipping 193 matching lines @@
         return;
       }
     }
 
     try {
       // Only run pub automatically if it is not already up to date
       File dir = container.getLocation().toFile();
       File pubFile = new File(dir, DartCore.PUBSPEC_FILE_NAME);
       File lockFile = new File(dir, DartCore.PUBSPEC_LOCK_FILE_NAME);
       File packagesDir = new File(dir, DartCore.PACKAGES_DIRECTORY_NAME);
-      if (packagesDir.exists() && lockFile.exists()
+      if ((DartCoreDebug.NO_PUB_PACKAGES || packagesDir.exists()) && lockFile.exists()
           && lockFile.lastModified() >= pubFile.lastModified()) {
         return;
       }
 
       // Run pub or notify the user that it needs to be run
       if (DartCore.getPlugin().isAutoRunPubEnabled()) {
         new RunPubJob(container, RunPubJob.INSTALL_COMMAND, true).run(monitor);
       } else {
         MessageConsole console = DartCore.getConsole();
         console.printSeparator("");
         console.println("Run Tools > Pub Get to install packages");
       }
 
     } finally {
       // Ensure that currentContainers is updated
       synchronized (currentContainers) {
         currentContainers.remove(container);
         currentContainers.notifyAll();
       }
     }
   }
 }