title: How to display latest revision in a file?
body: <p>I'm wondering how do you deal with displaying release revision number when pushing live new versions of your app?</p>
  
  <p>You can use <code>$Rev$</code> in a file to get latest revision, but only after you update the file.</p>
  
  <p>What if I want to update a string in one file every time I change any file in the repository/directory?</p>
  
  <p>Is there a way?</p>