title: What does "Required filename-based automodules detected." warning mean?
body: <p>In my multi-module project, I created <code>module-info.java</code> only for few modules. And during compilation with <code>maven-compiler-plugin:3.7.0</code> I'm getting next warning:</p>
  
  <blockquote>
    <p>[WARNING]
    * Required filename-based automodules detected. Please don't
    publish this project to a public artifact repository! *</p>
  </blockquote>
  
  <p>What does it mean? Is that because I have only a few modules with <code>module-info.java</code> and not the whole project?</p>