fix: add timeout to fetch to prevent silent hangs

Add AbortSignal.timeout(30s) to fetch requests to ensure they fail
fast instead of hanging indefinitely when network issues occur.
This fixes issues where the action would hang and eventually get
killed by GitHub Actions without a clear error message.

dist/setup/index.cjs

@@ -95790,10 +95790,16 @@ function getProxyAgent() {
   }
   return void 0;
 }
-var fetch = async (url2, opts) => await (0, import_undici2.fetch)(url2, {
-  dispatcher: getProxyAgent(),
-  ...opts
-});
+var fetch = async (url2, opts) => {
+  const timeoutSignal = AbortSignal.timeout(3e4);
+  const existingSignal = opts.signal;
+  const mergedSignal = existingSignal ? AbortSignal.any([timeoutSignal, existingSignal]) : timeoutSignal;
+  return await (0, import_undici2.fetch)(url2, {
+    dispatcher: getProxyAgent(),
+    ...opts,
+    signal: mergedSignal
+  });
+};
 
 // src/download/variant-selection.ts
 function selectDefaultVariant(entries, duplicateEntryDescription) {

dist/update-known-checksums/index.cjs

@@ -49749,10 +49749,16 @@ function getProxyAgent() {
   }
   return void 0;
 }
-var fetch = async (url, opts) => await (0, import_undici2.fetch)(url, {
-  dispatcher: getProxyAgent(),
-  ...opts
-});
+var fetch = async (url, opts) => {
+  const timeoutSignal = AbortSignal.timeout(3e4);
+  const existingSignal = opts.signal;
+  const mergedSignal = existingSignal ? AbortSignal.any([timeoutSignal, existingSignal]) : timeoutSignal;
+  return await (0, import_undici2.fetch)(url, {
+    dispatcher: getProxyAgent(),
+    ...opts,
+    signal: mergedSignal
+  });
+};
 
 // src/download/manifest.ts
 var cachedManifestData = /* @__PURE__ */ new Map();

src/utils/fetch.ts

@@ -14,8 +14,17 @@ export function getProxyAgent() {
   return undefined;
 }
 
-export const fetch = async (url: string, opts: RequestInit) =>
-  await undiciFetch(url, {
+export const fetch = async (url: string, opts: RequestInit) => {
+  // Merge timeout signal with any existing signal from opts
+  const timeoutSignal = AbortSignal.timeout(30_000);
+  const existingSignal = opts.signal;
+  const mergedSignal = existingSignal
+    ? AbortSignal.any([timeoutSignal, existingSignal])
+    : timeoutSignal;
+
+  return await undiciFetch(url, {
     dispatcher: getProxyAgent(),
     ...opts,
+    signal: mergedSignal,
   });
+};