From 20c1d2cf41a3b6f5c4dbab4da2b3897f6023f327 Mon Sep 17 00:00:00 2001
From: Daniel Roe <daniel@roe.dev>
Date: Fri, 3 Feb 2023 23:19:57 +0000
Subject: [PATCH] fix: provide fallback values for undefined runtime config

---
 src/options.ts     |  4 +++-
 src/utils/index.ts | 10 ++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/options.ts b/src/options.ts
index e0bd8bd203..35dd854121 100644
--- a/src/options.ts
+++ b/src/options.ts
@@ -8,7 +8,7 @@ import escapeRE from "escape-string-regexp";
 import { withLeadingSlash, withoutTrailingSlash, withTrailingSlash } from "ufo";
 import { isTest, isDebug } from "std-env";
 import { findWorkspaceDir } from "pkg-types";
-import { resolvePath, detectTarget } from "./utils";
+import { resolvePath, detectTarget, provideFallbackValues } from "./utils";
 import type {
   NitroConfig,
   NitroOptions,
@@ -290,6 +290,8 @@ export async function loadOptions(
   options.routeRules = normalizedRules;
 
   options.baseURL = withLeadingSlash(withTrailingSlash(options.baseURL));
+
+  provideFallbackValues(options.runtimeConfig);
   options.runtimeConfig = defu(options.runtimeConfig, {
     app: {
       baseURL: options.baseURL,
diff --git a/src/utils/index.ts b/src/utils/index.ts
index 1d973830d3..58147c622c 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -189,3 +189,13 @@ export async function retry(fn: () => Promise<void>, retries: number) {
   }
   throw error;
 }
+
+export function provideFallbackValues(obj: Record<string, any>) {
+  for (const key in obj) {
+    if (typeof obj[key] === "undefined" || obj[key] === null) {
+      obj[key] = "";
+    } else if (typeof obj[key] === "object") {
+      provideFallbackValues(obj[key]);
+    }
+  }
+}