Add timeout to warm gittar cache step

src/postinstall.js

@@ -22,7 +22,6 @@ const shExec = util.promisify(sh.exec);
  */
 async function warmNpmCache() {
   console.log('  Warm NPM cache for project template deps.');
-
   // cwd is the root dir where zkapp-cli's package.json is located.
   const tsProj = fs.readFileSync(
     path.join('templates', 'project-ts', 'package.json'),
@@ -43,6 +42,7 @@ async function warmNpmCache() {
 
   try {
     for await (const pkgWithVersion of toCache) {
+      console.log(`  Adding ${pkgWithVersion} to the cache.`);
       await shExec(`npm cache add ${pkgWithVersion}`);
     }
     console.log('    Done.');
@@ -55,9 +55,35 @@ async function warmGittarCache() {
   console.log('  Warm cache for project template.');
 
   try {
+    const maxTimeLimit = 15000;
     const src = 'github:o1-labs/zkapp-cli#main';
-    await gittar.fetch(src, { force: true });
+    console.log('  Fetching project template.');
+    const response = await gittarFetchInTimeLimit(
+      gittar.fetch(src, { force: true }),
+      maxTimeLimit
+    );
+
+    if (response === null) {
+      console.log('  Skip warm cache for project template');
+      return;
+    }
   } catch (err) {
     console.error(err);
   }
 }
+
+async function gittarFetchInTimeLimit(gittarFetch, maxTimeLimit) {
+  let gittarTimeout;
+
+  const gittarTimeoutPromise = new Promise((resolve, reject) => {
+    gittarTimeout = setTimeout(() => {
+      resolve(null);
+    }, maxTimeLimit);
+  });
+
+  const response = await Promise.race([gittarFetch, gittarTimeoutPromise]);
+
+  if (gittarTimeout) clearTimeout(gittarTimeout);
+
+  return response;
+}