title: Accessing Jenkins environmental variables through a custom mojo
body: <p>Is it possible to do this? </p>
  
  <p>For example could one do something like: </p>
  
  <pre><code>System.getEnv("$(env.BUILD_URL)");
  </code></pre>
  
  <p>I do not have access to Jenkins, so can't try it out myself :(</p>
  
  <p>Any help would be greatly appreciated. </p>