zookeeper/java/main/com/yahoo/zookeeper/Version.java

/*
 * Copyright 2008, Yahoo! Inc.
 *
 * Licensed 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 com.yahoo.zookeeper;

public class Version implements com.yahoo.zookeeper.version.Info{

    public static int getRevision() {
        return REVISION;
    }

    public static String getBuildDate() {
        return BUILD_DATE;
    }

    public static String getVersion() {
        return MAJOR + "." + MINOR + "." + MICRO;
    }

    public static String getVersionRevision() {
        return getVersion() + "-" + getRevision();
    }

    public static String getFullVersion() {
        return getVersionRevision() + ", built on " + getBuildDate();
    }

    public static void printUsage() {
        System.out
                .print("Usage:\tjava -cp ... com.yahoo.zookeeper.Version "
                        + "[--full | --short | --revision],\n\tPrints --full version "
                        + "info if no arg specified.");
        System.exit(1);
    }

    /**
     * Prints the current version, revision and build date to the standard out.
     * 
     * @param args
     *            <ul>
     *            <li> --short - prints a short version string "1.2.3"
     *            <li> --revision - prints a short version string with the SVN
     *            repository revision "1.2.3-94"
     *            <li> --full - prints the revision and the build date
     *            </ul>
     */
    public static void main(String[] args) {
        if (args.length > 1) {
            printUsage();
        }
        if (args.length == 0 || (args.length == 1 && args[0].equals("--full"))) {
            System.out.println(getFullVersion());
            System.exit(0);
        }
        if (args[0].equals("--short"))
            System.out.println(getVersion());
        else if (args[0].equals("--revision"))
            System.out.println(getVersionRevision());
        else
            printUsage();
        System.exit(0);
    }
}