title: Can I create an ack file type based on a filename, not extension?
body: <p>I would like to include files with a specific name -- not an extension -- in my <code>ack</code> search. Is this possible with ack?</p>
  
  <p>If I use the <code>-G</code> option, this would exclude all other file types. (So I can't put it in my <code>.ackrc</code> file.)</p>
  
  <p>I tried to use <code>--type-set mytype=filename.txt</code> but this only works for extensions, so this would search for files including the pattern <code>.filename.txt</code>, thus not find <code>filename.txt</code>. (That's also what the <code>ack --help types</code> shows: <code>--mytype .filename.txt</code>, not <code>--mytype filename.txt</code>.)</p>
  
  <p>Someone any ideas?</p>