GUI extension Yeoman generator

Change-Id: If6b3fae44e4ee8a7bde36600cdc71d54d49fbf6e
diff --git a/generator-xos-gui-extension/generators/templates/gulp_tasks/browsersync.js b/generator-xos-gui-extension/generators/templates/gulp_tasks/browsersync.js
new file mode 100755
index 0000000..0e4ada2
--- /dev/null
+++ b/generator-xos-gui-extension/generators/templates/gulp_tasks/browsersync.js
@@ -0,0 +1,39 @@
+
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+const gulp = require('gulp');
+const browserSync = require('browser-sync');
+const spa = require('browser-sync-spa');
+
+const browserSyncConf = require('../conf/browsersync.conf');
+const browserSyncDistConf = require('../conf/browsersync-dist.conf');
+
+browserSync.use(spa());
+
+gulp.task('browsersync', browserSyncServe);
+gulp.task('browsersync:dist', browserSyncDist);
+
+function browserSyncServe(done) {
+  browserSync.init(browserSyncConf());
+  done();
+}
+
+function browserSyncDist(done) {
+  browserSync.init(browserSyncDistConf());
+  done();
+}