From ea6b7d304e07d09b0d760700f6e27341b4e2553e Mon Sep 17 00:00:00 2001
From: Brian Muenzenmeyer <Brian.Muenzenmeyer@target.com>
Date: Fri, 9 Feb 2018 12:15:57 -0600
Subject: [PATCH] fix(event emission): Only listen once to changes

---
 core/index.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/core/index.js b/core/index.js
index 72aeeb27f..b4a0447e8 100644
--- a/core/index.js
+++ b/core/index.js
@@ -372,14 +372,14 @@ const patternlab_module = function(config) {
           copier()
             .copyAndWatch(patternlab.config.paths, patternlab, options)
             .then(() => {
-              this.events.on('patternlab-pattern-change', () => {
+              this.events.once(events.PATTERNLAB_PATTERN_CHANGE, f => {
                 if (!patternlab.isBusy) {
                   return this.build(options);
                 }
                 return Promise.resolve();
               });
 
-              this.events.on('patternlab-global-change', () => {
+              this.events.once(events.PATTERNLAB_GLOBAL_CHANGE, () => {
                 if (!patternlab.isBusy) {
                   return this.build(
                     Object.assign({}, options, { cleanPublic: true }) // rebuild everything