fixed watchify blocking program completion

Author: benholloway

lib/build/browserify.js

@@ -27,7 +27,9 @@ function create(opt) {
     bowerRelative  : false,
     projectRelative: false,
     transforms     : [],
-    sourceMapBase  : null
+    sourceMapBase  : null,
+    browserify     : null,
+    watchify       : null
   }, opt);
 
   // multiton instances within this collection
@@ -114,12 +116,15 @@ function create(opt) {
    */
   function createInstance(files) {
 
-    // initialise with a shared watchify cache
-    var instanceOptions = merge({
-      debug      : true,
-      ignoreWatch: /.*/
-    }, watchify.args);
-    var bundler = watchify(browserify(instanceOptions));
+    // browserify must be debug mode
+    var browserifyOpts = merge({}, options.browserify, {debug: true});
+
+    // watchify defaults to the shared watchify cache per watchify.args
+    // watch is not supported
+    var watchifyOpts = merge({}, watchify.args, options.watchify, {ignoreWatch: /.*/});
+
+    // create bundler
+    var bundler = watchify(browserify(browserifyOpts), watchifyOpts);
 
     // ensure anonymous module paths when we are minifying
     if (options.anonymous) {