GUI extension Yeoman generator

Change-Id: If6b3fae44e4ee8a7bde36600cdc71d54d49fbf6e
diff --git a/generator-xos-gui-extension/generators/templates/gulpfile.js b/generator-xos-gui-extension/generators/templates/gulpfile.js
new file mode 100755
index 0000000..a15e854
--- /dev/null
+++ b/generator-xos-gui-extension/generators/templates/gulpfile.js
@@ -0,0 +1,47 @@
+
+/*
+ * 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 HubRegistry = require('gulp-hub');
+const browserSync = require('browser-sync');
+
+const conf = require('./conf/gulp.conf');
+
+// Load some files into the registry
+const hub = new HubRegistry([conf.path.tasks('*.js')]);
+
+// Tell gulp to use the tasks just loaded
+gulp.registry(hub);
+
+gulp.task('build', gulp.series(gulp.parallel('other', 'webpack:dist')));
+gulp.task('test', gulp.series('karma:single-run'));
+gulp.task('test:auto', gulp.series('karma:auto-run'));
+gulp.task('serve', gulp.series('webpack:watch', 'watch', 'browsersync'));
+gulp.task('serve:dist', gulp.series('default', 'browsersync:dist'));
+gulp.task('default', gulp.series('clean', 'build'));
+gulp.task('watch', watch);
+
+function reloadBrowserSync(cb) {
+  browserSync.reload();
+  cb();
+}
+
+function watch(done) {
+  gulp.watch(conf.path.tmp('index.html'), reloadBrowserSync);
+  done();
+}