title: ctags for shell scripts without extensions
body: <p>I'm working on a Bash script that is designed to be run 'as a tool' so has a name without an extension and a <code>#!/usr/bin/bash</code> line at the top.</p>
  
  <p>My script has a number of functions, so it would be nice if I could use Vim's tagging support to jump around the code, but I can't get ctags to tag the file. <code>ctags mytool</code> produces a tags file that is blank except for the comment section at the top.</p>
  
  <p>If I rename my file to mytool.sh, <code>ctags mytool.sh</code> works perfectly.</p>
  
  <p>Is there a way to force ctags to tag a file without an extension?  I've tried a number of options that I found in the <a href="http://ctags.sourceforge.net/ctags.html#OPTIONS" rel="noreferrer">ctags manual</a> that seem to relate to file extensions, but without joy.  </p>