title: Handlebars helper to retrieve the basename of the file in which it is used
body: <p>I'm looking for a way to create a helper that simply renders the basename of the file in which the template was placed, and without requiring any additional parameters, like so: <code>{{ basename }}</code>.</p>
  
  <p>In other words, if I used this helper inside two partials, say <code>header.hbs</code> and <code>navbar.hbs</code>, I would expect the name of each partial to be render in the output wherever they were used. </p>
  
  <p>I've looked for hours and can't find any answers to this. Any direction or guidance would be appreciated.</p>