code: // Licensed to the Software Freedom Conservancy (SFC) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The SFC 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.openqa.selenium.grid.server;
  
  import com.beust.jcommander.JCommander;
  import com.beust.jcommander.Parameter;
  import java.io.PrintStream;
  import org.openqa.selenium.BuildInfo;
  
  public class HelpFlags {
  
    @Parameter(
        names = {"-h", "-help", "--help", "/?"},
        help = true,
        hidden = true)
    private boolean help;
  
    @Parameter(names = "--version", description = "Displays the version and exits.")
    private boolean version;
  
    public boolean displayHelp(JCommander commander, PrintStream outputTo) {
      if (version) {
        BuildInfo info = new BuildInfo();
  
        outputTo.printf(
            "%s version: %s, revision: %s%n",
            commander.getProgramName(), info.getReleaseLabel(), info.getBuildRevision());
  
        return true;
      }
  
      if (help) {
        commander.usage();
        return true;
      }
  
      return false;
    }
  }
  