From e992353a995feda76ba9a9dd74bda59a82bb7207 Mon Sep 17 00:00:00 2001
From: NullVoxPopuli <LPSego3+dev@gmail.com>
Date: Fri, 17 Dec 2021 15:37:48 -0500
Subject: [PATCH] docfyConfig is not guaranteed to exist

---
 packages/ember/src/index.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/packages/ember/src/index.ts b/packages/ember/src/index.ts
index 129f63e..df9b4dc 100644
--- a/packages/ember/src/index.ts
+++ b/packages/ember/src/index.ts
@@ -140,9 +140,9 @@ module.exports = {
   cacheKeyForTree(treeType: string): string {
     switch (treeType) {
       case 'app': {
-        const sources = (this.docfyConfig as DocfyConfig).sources
-          .map((item) => item.root)
-          .join(',');
+        const sources = (this.docfyConfig as DocfyConfig)?.sources
+          ?.map((item) => item.root)
+          ?.join(',');
         return cacheKeyForTree(treeType, this, [sources]);
       }
       default: