solved repeated duplicated error messages when apps that share code that is erroneous

Author: benholloway

lib/build/browserify.js

@@ -66,7 +66,7 @@ function create(opt) {
       getInstance(file.path)
         .bundle(this, file.relative)
         .catch(function onError(errors) {
-          messages.push.apply(messages, errors);
+          errors.forEach(addMessageUnique);
         })
         .finally(done);
     }
@@ -76,6 +76,12 @@ function create(opt) {
       done();
     }
 
+    function addMessageUnique(message) {
+      if (messages.indexOf(message) < 0) {
+        messages.push(message);
+      }
+    }
+
     return through.obj(transform, flush);
   }