title: Using Alias in Apache ONLY if local directory not present?
body: <p>We're running a reseller web host, and aliasing a particular directory for ALL the sites within. This is all happening through WHM/Cpanel, which could possibly complicate my question. </p>
  
  <ol>
  <li><p>We want all hosts to run their "/concrete" directory through a shared location on the server. This is working fine by adding "Alias /concrete/ "/usr/local/share/concrete5/concrete-latest/concrete/" to the apache include editor in WHM.</p></li>
  <li><p>However, if a local concrete/ directory exists within the particular webroot of the virtual host, we'd rather use that than "/concrete" globally. It would also be nice if we could make this alias change in the context of the virtual host, within WHM (and I haven't found a great way to modify virtual host sections in WHM without hacking a file that I don't believe we're supposed to hack.)</p></li>
  </ol>
  
  <p>Thoughts? </p>