From 4d79af2b4663cf2e851874d701d37d133eaa3d69 Mon Sep 17 00:00:00 2001
From: Valeriy <ValeraS@users.noreply.github.com>
Date: Sat, 16 Mar 2019 00:12:56 +0300
Subject: [PATCH] fix(tools): wait for the last challenge to be populated
 (#35596)

---
 curriculum/getChallenges.js | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/curriculum/getChallenges.js b/curriculum/getChallenges.js
index 7c45656fec..2d0d1a4abb 100644
--- a/curriculum/getChallenges.js
+++ b/curriculum/getChallenges.js
@@ -18,11 +18,20 @@ exports.getChallengesDirForLang = getChallengesDirForLang;
 
 exports.getChallengesForLang = function getChallengesForLang(lang) {
   let curriculum = {};
-  return new Promise(resolve =>
+  return new Promise(resolve => {
+    let running = 1;
+    function done() {
+      if (--running === 0) {
+        resolve(curriculum);
+      }
+    }
     readDirP({ root: getChallengesDirForLang(lang) })
-      .on('data', file => buildCurriculum(file, curriculum))
-      .on('end', () => resolve(curriculum))
-  );
+      .on('data', file => {
+        running++;
+        buildCurriculum(file, curriculum).then(done);
+      })
+      .on('end', done);
+  });
 };
 
 async function buildCurriculum(file, curriculum) {