reset Xcode installed state to fix the window

java/src/processing/mode/java/ExportPrompt.java

@@ -296,6 +296,8 @@ public class ExportPrompt {
           } else {
             // Launch the process asynchronously
             PApplet.exec("xcode-select", "--install");
+            // Reset the installed state so that the message will change.
+            JavaBuild.resetXcodeInstalled();
             // Close the window so that we can rebuild it with different text
             // once they've finished installing the Command Line Tools.
             dialog.setVisible(false);

java/src/processing/mode/java/JavaBuild.java

@@ -1104,6 +1104,11 @@ public class JavaBuild {
   }
 
 
+  static protected void resetXcodeInstalled() {
+    xcodeInstalled = null;  // give them another chance
+  }
+
+
   /**
    * Run the launch4j build.xml file through ant to create the exe.
    * Most of this code was lifted from Android mode.