Remove dependency on broccoli-asset-rev

Author: achambers

lib/key-generators/file-hash.js

@@ -2,7 +2,7 @@ var CoreObject  = require('core-object');
 var fs          = require('fs');
 var path        = require('path');
 var minimatch   = require('minimatch');
-var Fingerprint = require('broccoli-asset-rev/lib/fingerprint');
+var crypto      = require('crypto');
 var Promise     = require('ember-cli/lib/ext/promise');
 
 var denodeify   = require('rsvp').denodeify;
@@ -29,8 +29,7 @@ module.exports = CoreObject.extend({
 
     return readFile(filePath)
       .then(function(contents) {
-        fingerprint = new Fingerprint();
-        return fingerprint.hashFn(contents.toString());
+        return md5Hash(contents.toString());
       })
   },
 
@@ -42,3 +41,9 @@ module.exports = CoreObject.extend({
     return config[key];
   }
 });
+
+function md5Hash(buf) {
+  var md5 = crypto.createHash('md5');
+  md5.update(buf);
+  return md5.digest('hex');
+}