content: /*
   * Copyright 1999-2023 Alibaba Group Holding Ltd.
   *
   * 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.alibaba.nacos.plugin.control.utils;
  
  import com.alibaba.nacos.common.utils.StringUtils;
  
  import java.nio.file.Paths;
  
  /**
   * Control plugin env utils.
   *
   * @author xiweng.yy
   */
  public class EnvUtils {
      
      public static final String NACOS_HOME_KEY = "nacos.home";
      
      private static final String NACOS_HOME_PROPERTY = "user.home";
      
      private static final String NACOS_HOME_ADDITIONAL_FILEPATH = "nacos";
      
      private static String nacosHomePath = null;
      
      public static String getNacosHome() {
          if (StringUtils.isBlank(nacosHomePath)) {
              String nacosHome = System.getProperty(NACOS_HOME_KEY);
              if (StringUtils.isBlank(nacosHome)) {
                  nacosHome = Paths.get(System.getProperty(NACOS_HOME_PROPERTY), NACOS_HOME_ADDITIONAL_FILEPATH)
                          .toString();
              }
              return nacosHome;
          }
          return nacosHomePath;
      }
  }
  