clusterctl: Add public function to create new CRD migrator

Signed-off-by: Alexandr Demicev <alexandr.demicev@suse.com>

cmd/clusterctl/client/cluster/cert_manager.go

@@ -289,7 +289,7 @@ func (cm *certManagerClient) migrateCRDs(ctx context.Context) error {
 		return err
 	}
 
-	return newCRDMigrator(c).Run(ctx, objs)
+	return NewCRDMigrator(c).Run(ctx, objs)
 }
 
 func (cm *certManagerClient) deleteObjs(ctx context.Context, objs []unstructured.Unstructured) error {

cmd/clusterctl/client/cluster/crd_migration.go

@@ -35,15 +35,20 @@ import (
 	logf "sigs.k8s.io/cluster-api/cmd/clusterctl/log"
 )
 
+// CRDMigrator interface defines methods for migrating CRs to the storage version of new CRDs.
+type CRDMigrator interface {
+	Run(ctx context.Context, objs []unstructured.Unstructured) error
+}
+
 // crdMigrator migrates CRs to the storage version of new CRDs.
 // This is necessary when the new CRD drops a version which
 // was previously used as a storage version.
 type crdMigrator struct {
 	Client client.Client
 }
 
-// newCRDMigrator creates a new CRD migrator.
-func newCRDMigrator(client client.Client) *crdMigrator {
+// NewCRDMigrator creates a new CRD migrator.
+func NewCRDMigrator(client client.Client) CRDMigrator {
 	return &crdMigrator{
 		Client: client,
 	}

cmd/clusterctl/client/cluster/upgrader.go

@@ -382,7 +382,7 @@ func (u *providerUpgrader) doUpgrade(ctx context.Context, upgradePlan *UpgradePl
 			return err
 		}
 
-		if err := newCRDMigrator(c).Run(ctx, components.Objs()); err != nil {
+		if err := NewCRDMigrator(c).Run(ctx, components.Objs()); err != nil {
 			return err
 		}
 	}