use config to determine active theme

scripts/sync-build-dir.js

@@ -0,0 +1,22 @@
+const syncBuildDir = require('copyfiles');
+const path = require('path');
+const {
+  projectRoot,
+  theme,
+  themePath,
+} = require('../webpack/helpers');
+
+const projectDepth = projectRoot('./').split(path.sep).length;
+
+let callback;
+
+if (theme !== null && theme !== undefined) {
+  callback = () => {
+    syncBuildDir([path.join(themePath, '**/*'), 'build'], { up: projectDepth + 2 }, () => {})
+  }
+}
+else {
+  callback = () => {};
+}
+
+syncBuildDir([projectRoot('src/**/*'), 'build'], { up: projectDepth + 1 }, callback);