Fix incorrect cache-hit check

src/cache.ts

@@ -99,7 +99,7 @@ async function computeCacheKey(
       `No file in ${process.cwd()} matched to [${pattern}], make sure you have checked out the target repository`
     );
   }
-  return `${CACHE_KEY_PREFIX}-${process.env['RUNNER_OS']}-ABC-${process.arch}-${packageManager.id}-${fileHash}`;
+  return `${CACHE_KEY_PREFIX}-${process.env['RUNNER_OS']}-${process.arch}-${packageManager.id}-${fileHash}`;
 }
 
 /**
@@ -117,9 +117,11 @@ export async function restore(id: string, cacheDependencyPath: string) {
   const matchedKey = await cache.restoreCache(packageManager.path, primaryKey);
   if (matchedKey) {
     core.saveState(CACHE_MATCHED_KEY, matchedKey);
+    core.saveState(STATE_CACHE_HIT, true);
     core.setOutput('cache-hit', true);
     core.info(`Cache restored from key: ${matchedKey}`);
   } else {
+    core.saveState(STATE_CACHE_HIT, false);
     core.setOutput('cache-hit', false);
     core.info(`${packageManager.id} cache is not found`);
   }
@@ -131,7 +133,6 @@ export async function restore(id: string, cacheDependencyPath: string) {
  */
 export async function save(id: string) {
   const packageManager = findPackageManager(id);
-  const matchedKey = core.getState(CACHE_MATCHED_KEY);
 
   // Inputs are re-evaluated before the post action, so we want the original key used for restore
   const primaryKey = core.getState(STATE_CACHE_PRIMARY_KEY);
@@ -140,7 +141,7 @@ export async function save(id: string) {
   if (!primaryKey) {
     core.warning('Error retrieving key from state.');
     return;
-  } else if (matchedKey === primaryKey || cacheHit) {
+  } else if (cacheHit) {
     // no change in target directories
     core.info(
       `Cache hit occurred on the primary key ${primaryKey}, not saving cache.`