Use UglifyJS to minify JavaScript in the LMS

lms/envs/common.py

@@ -1260,7 +1260,7 @@ if os.path.isdir(DATA_DIR):
 
 
 PIPELINE_CSS_COMPRESSOR = None
-PIPELINE_JS_COMPRESSOR = None
+PIPELINE_JS_COMPRESSOR = "pipeline.compressors.uglifyjs.UglifyJSCompressor"
 
 STATICFILES_IGNORE_PATTERNS = (
     "sass/*",
@@ -1271,7 +1271,7 @@ STATICFILES_IGNORE_PATTERNS = (
     "common_static",
 )
 
-PIPELINE_YUI_BINARY = 'yui-compressor'
+PIPELINE_UGLIFYJS_BINARY='node_modules/.bin/uglifyjs'
 
 # Setting that will only affect the edX version of django-pipeline until our changes are merged upstream
 PIPELINE_COMPILE_INPLACE = True

package.json

@@ -2,6 +2,7 @@
     "name": "edx",
     "version": "0.1.0",
     "dependencies": {
-      "coffee-script": "1.6.1"
+      "coffee-script": "1.6.1",
+      "uglify-js": "2.4.15"
     }
 }