add replacement transformer

api/types/kustomization.go

@@ -74,6 +74,10 @@ type Kustomization struct {
 	// patch, but this operator is simpler to specify.
 	Images []Image `json:"images,omitempty" yaml:"images,omitempty"`
 
+	// Replacements is a list of replacements, which will copy nodes from a
+	// specified source to N specified targets.
+	Replacements []ReplacementField `json:"replacements,omitempty" yaml:"replacements,omitempty"`
+
 	// Replicas is a list of {resourcename, count} that allows for simpler replica
 	// specification. This can also be done with a patch.
 	Replicas []Replica `json:"replicas,omitempty" yaml:"replicas,omitempty"`

api/types/replacementfield.go

@@ -0,0 +1,6 @@
+package types
+
+type ReplacementField struct {
+	Replacement `json:",inline,omitempty" yaml:",inline,omitempty"`
+	Path        string `json:"path,omitempty" yaml:"path,omitempty"`
+}