code: /*
   * 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 org.apache.skywalking.oap.server.core.version;
  
  import java.io.IOException;
  import java.util.Properties;
  import lombok.Getter;
  import org.apache.logging.log4j.util.Strings;
  
  @Getter
  public enum Version {
      CURRENT;
  
      private final String buildVersion;
      private final String commitId;
  
      private final Properties properties = new Properties();
  
      Version() {
          try {
              properties.load(Version.class.getClassLoader()
                                           .getResourceAsStream("version.properties"));
              buildVersion = properties.getProperty("git.build.version");
              commitId = properties.getProperty("git.commit.id");
          } catch (IOException e) {
              throw new ExceptionInInitializerError(e);
          }
      }
  
      @Override
      public String toString() {
          return String.format(
              "%s-%s",
              buildVersion,
              Strings.left(commitId, 7)
          );
      }
  }
  