Move hashing transformer out of k8sdeps.

pkg/ifc/ifc.go

@@ -58,6 +58,7 @@ type Kunstructured interface {
 type KunstructuredFactory interface {
 	SliceFromBytes([]byte) ([]Kunstructured, error)
 	FromMap(m map[string]interface{}) Kunstructured
+	Hasher() KunstructuredHasher
 	MakeConfigMap(
 		ldr Loader,
 		options *types.GeneratorOptions,
@@ -68,5 +69,11 @@ type KunstructuredFactory interface {
 		args *types.SecretArgs) (Kunstructured, error)
 }
 
+// KunstructuredHasher returns a hash of the argument
+// or an error.
+type KunstructuredHasher interface {
+	Hash(Kunstructured) (string, error)
+}
+
 // See core.v1.SecretTypeOpaque
 const SecretTypeOpaque = "Opaque"