From 043bb846f1e3898703f3cf7de3a898b5052e4483 Mon Sep 17 00:00:00 2001
From: Eric Liu <ericyl.us@gmail.com>
Date: Fri, 25 Feb 2022 18:29:43 -0800
Subject: [PATCH] chore: add undefined check

---
 src/preprocessReadme.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/preprocessReadme.ts b/src/preprocessReadme.ts
index cea34cd..fb83867 100644
--- a/src/preprocessReadme.ts
+++ b/src/preprocessReadme.ts
@@ -97,7 +97,7 @@ export function preprocessReadme(opts: Partial<PreprocessReadmeOptions>): Pick<P
   return {
     // @ts-ignore
     markup: ({ content, filename }) => {
-      if (/node_modules/.test(filename) || !filename.endsWith(".md")) return null;
+      if (filename && (/node_modules/.test(filename) || !filename.endsWith(".md"))) return null;
 
       if (opts.repoUrl) {
         content = content.replace("<!-- REPO_URL -->", `[GitHub repo](${opts.repoUrl})`);