serve with sync and watch

build/browsersync.js

@@ -0,0 +1,40 @@
+const browserSync  = require('browser-sync');
+const cp           = require('child_process');
+
+const jekyll       = process.platform === 'win32' ? 'jekyll.bat' : 'jekyll';
+
+const scssPath     = ['_scss/**/*.scss'];
+const jsPath       = ['_scripts/*.js'];
+const templatePath = [ '**/*.html', '**/*.yml', '_posts/*', '_drafts/*'];
+
+module.exports = gulp => {
+
+  // Build the Jekyll Site
+  gulp.task('jekyll-build', done => {
+    return cp.spawn( jekyll , ['build', '--drafts', '--config', '_config.yml'], {stdio: 'inherit'})
+    .on('close', done);
+  });
+
+  // Rebuild Jekyll then reload the page
+  gulp.task('jekyll-rebuild', ['jekyll-build'], () => {
+    browserSync.reload();
+  });
+
+  // Wait for jekyll-build task to complete, then launch the Server
+  gulp.task('browser-sync', ['sass', 'scripts', 'jekyll-build'], () => {
+    browserSync({
+      server: {
+        baseDir: '_site'
+      }
+    });
+  });
+
+  gulp.task('watch', () => {
+    gulp.watch(scssPath, ['sass', 'jekyll-rebuild']);
+    gulp.watch(jsPath, ['scripts', 'jekyll-rebuild']);
+    gulp.watch(templatePath, ['jekyll-rebuild']);
+  });
+
+  gulp.task('serve', ['browser-sync', 'watch']);
+
+}