title: How do I list all licenses used in a maven project?
body: <p>I have a multimodule project that has a lot of dependencies.  I want to check which licenses it had at a certain point, and see how many licenses were added since then.  Is there an easy way to do this?</p>
  
  <p>I found these plugins:</p>
  
  <ol>
  <li><a href="https://maven.apache.org/plugins/maven-project-info-reports-plugin/license-mojo.html">https://maven.apache.org/plugins/maven-project-info-reports-plugin/license-mojo.html</a></li>
  <li><a href="http://www.mojohaus.org/license-maven-plugin/examples/example-download-licenses.html">http://www.mojohaus.org/license-maven-plugin/examples/example-download-licenses.html</a></li>
  </ol>
  
  <p>But neither of these give me <em>exactly</em> what I want.  I have to do a lot of post processing after this.  Is there a more direct way to see the list of licenses used in a maven project?</p>