title: gulp-concat: multiple external "config" files, is it possible?
body: <p>Disclaimer: new to node, streams, gulp</p>
  
  <p>I am wanting to update/improve our current build process to use gulp through the frontend-maven-plugin and I would like to know if it is possible to use external config files to tell gulp concat what files to work with?</p>
  
  <p>Currently we are doing this with a bit of ruby and json that lives under /scripts/config/ and gets outputed to a combined folder. There are dozens of these configs, which can grow or shrink release by release.</p>
  
  <p>An example config file looks like so: </p>
  
  <pre><code>{
  "outputFileName": "foo.js",
  "dependencies":["blah.js","blah.js","blah.js"]
  }
  </code></pre>
  
  <p>All the examples I have seen have been with a predefined hard coded list in the gulp file. I guess what I am really asking is if this functionality exists out of the box or do I need to write a plugin for this, assumes of course that one does not already exist.</p>
  
  <p>Thanks for you time</p>