Index: ruby/platform/src/org/netbeans/api/ruby/platform/RubyInstallation.java
===================================================================
RCS file: /cvs/ruby/platform/src/org/netbeans/api/ruby/platform/RubyInstallation.java,v
retrieving revision 1.35.2.1
diff -u -u -r1.35.2.1 RubyInstallation.java
--- ruby/platform/src/org/netbeans/api/ruby/platform/RubyInstallation.java	12 Nov 2007 18:39:06 -0000	1.35.2.1
+++ ruby/platform/src/org/netbeans/api/ruby/platform/RubyInstallation.java	26 Nov 2007 23:51:56 -0000
@@ -779,6 +779,14 @@
      * @return The actual root the in the system the file is under.
      */
     public FileObject getSystemRoot(FileObject file) {
+        // Don't initialize the Ruby interpreter here if it hasn't already been initialized 
+        // (see issue #121477). Our class path resolver may be called even when there are no
+        // Ruby projects open, and we don't want to make the user ask about Ruby interpreters
+        // in that case.
+        if (ruby == null) {
+            return null;
+        }
+        
         // See if the file is under the Ruby libraries
         FileObject rubyLibFo = getRubyLibFo();
         FileObject rubyStubs = getRubyStubs();
Index: ruby/projects/src/org/netbeans/modules/ruby/rubyproject/RubyProject.java
===================================================================
RCS file: /cvs/ruby/projects/src/org/netbeans/modules/ruby/rubyproject/RubyProject.java,v
retrieving revision 1.7
diff -u -u -r1.7 RubyProject.java
--- ruby/projects/src/org/netbeans/modules/ruby/rubyproject/RubyProject.java	13 Oct 2007 17:37:46 -0000	1.7
+++ ruby/projects/src/org/netbeans/modules/ruby/rubyproject/RubyProject.java	26 Nov 2007 23:51:56 -0000
@@ -54,6 +54,7 @@
 import org.netbeans.api.project.Project;
 import org.netbeans.api.project.ProjectInformation;
 import org.netbeans.api.project.ProjectManager;
+import org.netbeans.api.ruby.platform.RubyInstallation;
 import org.netbeans.modules.ruby.rubyproject.classpath.ClassPathProviderImpl;
 import org.netbeans.modules.ruby.rubyproject.queries.RubyProjectEncodingQueryImpl;
 import org.netbeans.modules.ruby.rubyproject.ui.RubyLogicalViewProvider;
@@ -386,6 +387,9 @@
         ProjectOpenedHookImpl() {}
         
         protected void projectOpened() {
+            // Force Ruby interpreter initialization
+            RubyInstallation.getInstance().getRuby(false);
+
             // Check up on build scripts.
 /*
             try {
Index: ruby/railsprojects/src/org/netbeans/modules/ruby/railsprojects/RailsProject.java
===================================================================
RCS file: /cvs/ruby/railsprojects/src/org/netbeans/modules/ruby/railsprojects/RailsProject.java,v
retrieving revision 1.12
diff -u -u -r1.12 RailsProject.java
--- ruby/railsprojects/src/org/netbeans/modules/ruby/railsprojects/RailsProject.java	26 Oct 2007 21:07:46 -0000	1.12
+++ ruby/railsprojects/src/org/netbeans/modules/ruby/railsprojects/RailsProject.java	26 Nov 2007 23:51:57 -0000
@@ -53,6 +53,7 @@
 import org.netbeans.api.project.Project;
 import org.netbeans.api.project.ProjectInformation;
 import org.netbeans.api.project.ProjectManager;
+import org.netbeans.api.ruby.platform.RubyInstallation;
 import org.netbeans.modules.ruby.railsprojects.classpath.ClassPathProviderImpl;
 import org.netbeans.modules.ruby.railsprojects.queries.RailsProjectEncodingQueryImpl;
 import org.netbeans.modules.ruby.railsprojects.server.RailsServer;
@@ -382,6 +383,9 @@
         public ProjectOpenedHookImpl() {}
         
         protected void projectOpened() {
+            // Force Ruby interpreter initialization
+            RubyInstallation.getInstance().getRuby(false);
+
             open();
         }