add MakeHashTransformer in TransformerFactory; remove hash interface

pkg/ifc/ifc.go

@@ -42,11 +42,6 @@ type Loader interface {
 	Cleanup() error
 }
 
-// Hash interface provides function to compute hash of objects
-type Hash interface {
-	Hash(m map[string]interface{}) (string, error)
-}
-
 // Kunstructured allows manipulation of k8s objects
 // that do not have Golang structs.
 type Kunstructured interface {

pkg/ifc/transformer/transformer.go

@@ -15,14 +15,15 @@ limitations under the License.
 */
 
 // Package patch holds miscellaneous interfaces used by kustomize.
-package patch
+package transformer
 
 import (
 	"sigs.k8s.io/kustomize/pkg/resource"
 	"sigs.k8s.io/kustomize/pkg/transformers"
 )
 
-// TransformerFactory makes patch transformer.
-type TransformerFactory interface {
+// Factory makes transformers
+type Factory interface {
 	MakePatchTransformer(slice []*resource.Resource, rf *resource.Factory) (transformers.Transformer, error)
+	MakeHashTransformer() transformers.Transformer
 }