Rewatch on newly added extensions since grunt watch can't hotswap config

helpers/GruntHelper.js

@@ -164,6 +164,9 @@ module.exports.prototype.runTask = function (taskName) {
 // Triggers grunt's watch task
 // Note: We don't use runTask to get access to the child process
 module.exports.prototype.watch = function () {
+  // Prevent multiple watch calls
+  if (this.watchChild) return;
+
   console.log('Starting grunt watch');
 
   var d = q.defer(),
@@ -199,9 +202,28 @@ module.exports.prototype.watch = function () {
 
   }.bind(this));
 
+  this.watchChild = child;
+
   return d.promise;
 };
 
+// Restarts the existing watch process
+module.exports.prototype.rewatch = function () {
+  var cb = function () {
+    this.watchChild = null;
+    this.watch();
+  }.bind(this);
+
+  // Kill the existing watch
+  if (this.watchChild) {
+    this.watchChild.on('close', cb);
+
+    this.watchChild.kill('SIGHUP');
+  } else {
+    cb();
+  }
+};
+
 // Triggers the compile tasks to precompile any existing files
 // Precond: the configuration object supplied to grunt's initConfig
 module.exports.prototype.compileTasks = function (config) {

index.js

@@ -146,7 +146,11 @@ Ya.prototype.processAdditionalExtension = function (ext) {
         .then(function () {
           return this.grunt.compileTasks(config);
         }.bind(this));
-      }.bind(this))
+    }.bind(this))
+
+    .then(function () {
+      this.grunt.rewatch();
+    }.bind(this))
 
     .done();
 };