FORGE-422

shell/src/main/java/org/jboss/forge/shell/Bootstrap.java

@@ -56,7 +56,9 @@ public class Bootstrap
 {
 
    public static final String PROP_PLUGIN_DIR = "org.jboss.forge.pluginDir";
+   public static final String PROP_EVALUATE = "org.jboss.forge.evaluate";
    private static final String ARG_PLUGIN_DIR = "-pluginDir";
+   private static final String ARG_EVALUATE = "-e";
 
    private static boolean pluginSystemEnabled = !Boolean.getBoolean("forge.plugins.disable");
    private static Thread currentShell = null;
@@ -76,6 +78,7 @@ public static void main(final String[] args)
 
    private static void readArguments(String[] args) {
       readPluginDirArgument(args);
+      readEvaluateArgument(args);
    }
 
    private static void readPluginDirArgument(String[] args) {
@@ -86,6 +89,15 @@ private static void readPluginDirArgument(String[] args) {
          }
       }
    }
+
+   private static void readEvaluateArgument(String[] args) {
+      for (int i = 0; i < args.length; i++) {
+         if (ARG_EVALUATE.equals(args[i]) && i + 1 < args.length) {
+            System.setProperty(PROP_EVALUATE, args[i + 1]);
+            return;
+         }
+      }
+   }
 
    private static void init()
    {

shell/src/main/java/org/jboss/forge/shell/EvaluateListener.java

@@ -0,0 +1,56 @@
+/*
+ * JBoss, Home of Professional Open Source
+ * Copyright 2012, Red Hat, Inc., and individual contributors
+ * by the @authors tag. See the copyright.txt in the distribution for a
+ * full listing of individual contributors.
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this software; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+ */
+package org.jboss.forge.shell;
+
+import javax.enterprise.event.Observes;
+import javax.inject.Inject;
+
+import org.jboss.forge.shell.events.PostStartup;
+
+/**
+ * Handles the -e --evaluate command line option and shuts down the shell.
+ * 
+ * @author <a href="mailto:lincolnbaxter@gmail.com">Lincoln Baxter, III</a>
+ * 
+ */
+public class EvaluateListener
+{
+    @Inject
+    private Shell shell;
+
+    public void evaluate(@Observes PostStartup event)
+    {
+        String evaluate = System.getProperty(Bootstrap.PROP_EVALUATE);
+        if (evaluate != null)
+        {
+            try
+            {
+                shell.execute(evaluate);
+                System.exit(0);
+            }
+            catch (Exception e)
+            {
+                System.exit(1);
+            }
+        }
+    }
+}