Fixes #3610 - Add ability to set temporary directory for Piranha Uber (…

…#3611)

uber/src/main/java/cloud/piranha/uber/UberPiranha.java

@@ -28,18 +28,54 @@
 
 package cloud.piranha.uber;
 
+import java.io.File;
+
 /**
- * The uber version of Piranha.
+ * The Uber version of Piranha.
  *
  * @author Manfred Riem ([email protected])
  */
-public class UberPiranha {
+public class UberPiranha implements Runnable {
+
+    /**
+     * Stores the temporary directory.
+     */
+    private File tempDirectory = new File(".piranhaUber");
 
     /**
      * Main method.
      * 
      * @param arguments the command-line arguments.
      */
     public static void main(String[] arguments) {
+        UberPiranha piranha = new UberPiranha();
+        piranha.parseArguments(arguments);
+        piranha.run();
+    }
+
+    /**
+     * Parse the arguments.
+     * 
+     * @param arguments the arguments.
+     */
+    private void parseArguments(String[] arguments) {
+        for(int i=0; i<arguments.length; i++) {
+            if (arguments[i].equals("--uber-temp-directory")) {
+                tempDirectory = new File(arguments[i + 1]);
+            }
+        }
+    }
+
+    /**
+     * Run method.
+     */
+    @Override
+    public void run() {
+        if (!tempDirectory.exists()) {
+            if (!tempDirectory.mkdirs()) {
+                System.err.println("Unable to create temporary directory, exiting");
+                System.exit(1);
+            }
+        }
     }
 }