From 09d23d69255c2f950d014974218c28384c92ac2a Mon Sep 17 00:00:00 2001
From: Daniel Roe <daniel@roe.dev>
Date: Wed, 3 Apr 2024 12:55:34 +0100
Subject: [PATCH] feat: expose `getRouteRulesForPath` from nitro runtime
 (#2238)

---
 src/runtime/cache.ts       |  2 +-
 src/runtime/index.ts       |  2 +-
 src/runtime/route-rules.ts | 11 ++++++++++-
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/src/runtime/cache.ts b/src/runtime/cache.ts
index 25a230c971..a7959369b0 100644
--- a/src/runtime/cache.ts
+++ b/src/runtime/cache.ts
@@ -199,7 +199,7 @@ export interface CachedEventHandlerOptions<T = any>
   shouldBypassCache?: (event: H3Event) => boolean | Promise<boolean>;
   getKey?: (event: H3Event) => string | Promise<string>;
   headersOnly?: boolean;
-  varies?: string[];
+  varies?: string[] | readonly string[];
 }
 
 function escapeKey(key: string | string[]) {
diff --git a/src/runtime/index.ts b/src/runtime/index.ts
index 062edd9744..d44e31ac6a 100644
--- a/src/runtime/index.ts
+++ b/src/runtime/index.ts
@@ -4,7 +4,7 @@ export { useNitroApp } from "./app";
 export * from "./plugin";
 export * from "./task";
 export * from "./renderer";
-export { getRouteRules } from "./route-rules";
+export { getRouteRules, getRouteRulesForPath } from "./route-rules";
 export { useStorage } from "./storage";
 export { useEvent } from "./context";
 export { defineNitroErrorHandler } from "./error";
diff --git a/src/runtime/route-rules.ts b/src/runtime/route-rules.ts
index 74ffb5af79..d465256fce 100644
--- a/src/runtime/route-rules.ts
+++ b/src/runtime/route-rules.ts
@@ -74,6 +74,15 @@ export function getRouteRules(event: H3Event): NitroRouteRules {
   return event.context._nitro.routeRules;
 }
 
-export function getRouteRulesForPath(path: string): NitroRouteRules {
+type DeepReadonly<T> =
+  T extends Record<string, any>
+    ? { readonly [K in keyof T]: DeepReadonly<T[K]> }
+    : T extends Array<infer U>
+      ? ReadonlyArray<DeepReadonly<U>>
+      : T;
+
+export function getRouteRulesForPath(
+  path: string
+): DeepReadonly<NitroRouteRules> {
   return defu({}, ..._routeRulesMatcher.matchAll(path).reverse());
 }