Make build-ScriptDetection sync

scripts/build-storybooks.js

@@ -7,11 +7,11 @@ const {
   readFile: readFileRaw,
   writeFile: writeFileRaw,
   statSync,
+  readFileSync,
 } = require('fs');
 const { join } = require('path');
 
 const readdir = promisify(readdirRaw);
-const readFile = promisify(readFileRaw);
 const writeFile = promisify(writeFileRaw);
 
 const p = l => join(__dirname, '..', ...l);
@@ -35,8 +35,8 @@ const exec = async (command, args = [], options = {}) =>
       });
   });
 
-const hasBuildScript = async l => {
-  const text = await readFile(l, 'utf8');
+const hasBuildScript = l => {
+  const text = readFileSync(l, 'utf8');
   const json = JSON.parse(text);
 
   return !!json.scripts['build-storybook'];
@@ -123,7 +123,7 @@ const handleExamples = async files => {
     try {
       stats = statSync(packageJsonLocation);
     } catch (e) {
-      //
+      // the folder had no package.json, we'll ignore
     }
 
     return stats && stats.isFile() && hasBuildScript(packageJsonLocation);