Add a method to avoid breaking changes

Signed-off-by: Sachin Kale <[email protected]>

Author: sachinpkale

server/src/main/java/org/opensearch/repositories/RepositoriesService.java

@@ -686,6 +686,14 @@ public static void validate(final String identifier) {
         }
     }
 
+    public static void validateRepositoryMetadataSettings(
+        ClusterService clusterService,
+        final String repositoryName,
+        final Settings repositoryMetadataSettings
+    ) {
+        validateRepositoryMetadataSettings(clusterService, repositoryName, repositoryMetadataSettings, null, null, null);
+    }
+
     public static void validateRepositoryMetadataSettings(
         ClusterService clusterService,
         final String repositoryName,
@@ -708,6 +716,12 @@ public static void validateRepositoryMetadataSettings(
             );
         }
         if (SHALLOW_SNAPSHOT_V2.get(repositoryMetadataSettings)) {
+            if (repositories == null || repositoriesService == null || settings == null) {
+                throw new RepositoryException(
+                    repositoryName,
+                    "setting " + SHALLOW_SNAPSHOT_V2.getKey() + " cannot be enabled if required params are not provided"
+                );
+            }
             if (minVersionInCluster.onOrAfter(Version.V_2_17_0) == false) {
                 throw new RepositoryException(
                     repositoryName,