add a fallback restore-key for poetry cache

Author: krishanbhasin-gc

__tests__/cache-restore.test.ts

@@ -300,7 +300,7 @@ virtualenvs.path = "{cache-dir}/virtualenvs"  # /Users/patrick/Library/Caches/py
             result = 'pipenv cache is not found';
             break;
           case 'poetry':
-            result = 'poetry cache is not found';
+            result = `Cache restored from key: ${pipFileLockHash}`;
             break;
         }
 

src/cache-distributions/poetry-cache.ts

@@ -48,10 +48,10 @@ class PoetryCache extends CacheDistributor {
     const hash = await glob.hashFiles(this.patterns);
     // "v2" is here to invalidate old caches of this cache distributor, which were created broken:
     const primaryKey = `${this.CACHE_KEY_PREFIX}-${process.env['RUNNER_OS']}-python-${this.pythonVersion}-${this.packageManager}-v2-${hash}`;
-    const restoreKey = undefined;
+    const restoreKey = `${this.CACHE_KEY_PREFIX}-${process.env['RUNNER_OS']}-python-${this.pythonVersion}-${this.packageManager}-`;
     return {
       primaryKey,
-      restoreKey
+      restoreKey: [restoreKey]
     };
   }