helper methods, types, and unit tests for transformer annotations

api/resmap/resmap.go

@@ -21,6 +21,13 @@ type Transformer interface {
 	Transform(m ResMap) error
 }
 
+// A TransformerWithProperties contains a Transformer and stores
+// some of its properties
+type TransformerWithProperties struct {
+	Transformer
+	Origin *resource.Origin
+}
+
 // A Generator creates an instance of ResMap.
 type Generator interface {
 	Generate() (ResMap, error)
@@ -144,10 +151,24 @@ type ResMap interface {
 	AbsorbAll(ResMap) error
 
 	// AddOriginAnnotation will add the provided origin as
-	// an annotation to all resources in the Resmap, if
+	// an origin annotation to all resources in the ResMap, if
 	// the origin is not nil.
 	AddOriginAnnotation(origin *resource.Origin) error
 
+	// RemoveOriginAnnotation will remove the origin annotation
+	// from all resources in the ResMap
+	RemoveOriginAnnotations() error
+
+	// AddTransformerAnnotation will add the provided origin as
+	// an origin annotation if the resource doesn't have one; a
+	// transformer annotation otherwise; to all resources in
+	// ResMap
+	AddTransformerAnnotation(origin *resource.Origin) error
+
+	// RemoveTransformerAnnotation will remove the transformer annotation
+	// from all resources in the ResMap
+	RemoveTransformerAnnotations() error
+
 	// AnnotateAll annotates all resources in the ResMap with
 	// the provided key value pair.
 	AnnotateAll(key string, value string) error