Add primaryKey check

dist/cache-save/index.js

@@ -60379,6 +60379,10 @@ const cachePackages = () => __awaiter(void 0, void 0, void 0, function* () {
     if (nonExistingPaths.length) {
         logWarning(`Cache folder path is retrieved but doesn't exist on disk: ${nonExistingPaths.join(', ')}`);
     }
+    if (!primaryKey) {
+        core.info('Primary key was not generated. Please check the log messages above for more errors or information');
+        return;
+    }
     if (primaryKey === state) {
         core.info(`Cache hit occurred on the primary key ${primaryKey}, not saving cache.`);
         return;

src/cache-save.ts

@@ -59,6 +59,13 @@ const cachePackages = async () => {
     );
   }
 
+  if (!primaryKey) {
+    core.info(
+      'Primary key was not generated. Please check the log messages above for more errors or information'
+    );
+    return;
+  }
+
   if (primaryKey === state) {
     core.info(
       `Cache hit occurred on the primary key ${primaryKey}, not saving cache.`