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Google App Engine compliant variation of FreeMarker. FreeMarker is a "template engine"; a generic tool to generate text output based on templates.

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * 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 freemarker.core;

import freemarker.template.Configuration;
import freemarker.template.Version;
import freemarker.template.utility.DateUtil;

/**
 * FreeMarker command-line utility, the Main-Class of freemarker.jar.
 * Currently it just prints the version number.
 * 
 * @deprecated Will be removed (main method in a library, often classified as CWE-489 "Leftover Debug Code").
 */
@Deprecated
public class CommandLine {
    
    public static void main(String[] args) {
        Version ver = Configuration.getVersion();
        
        System.out.println();
        System.out.print("Apache FreeMarker version ");
        System.out.print(ver);
        
        /* If the version number doesn't already contain the build date and it's known, print it: */
        if (!ver.toString().endsWith("Z")
        		&& ver.getBuildDate() != null) {
	        System.out.print(" (built on ");
	        System.out.print(DateUtil.dateToISO8601String(
	        		ver.getBuildDate(),
	        		true, true, true, DateUtil.ACCURACY_SECONDS,
	        		DateUtil.UTC,
	        		new DateUtil.TrivialDateToISO8601CalendarFactory()));
	        System.out.print(")");
        }
        System.out.println();
        
        if (ver.isGAECompliant() != null) {
            System.out.print("Google App Engine complian variant: ");
            System.out.println(ver.isGAECompliant().booleanValue() ? "Yes" : "No");
        }
    }
}