Copy reference nodes before copying comments and syncing order

kyaml/comments/comments.go

@@ -11,10 +11,12 @@ import (
 
 // CopyComments recursively copies the comments on fields in from to fields in to
 func CopyComments(from, to *yaml.RNode) error {
-	copy(from, to)
+	// from node should not be modified, it should be just used as a reference
+	fromCopy := from.Copy()
+	copyFieldComments(fromCopy, to)
 	// walk the fields copying comments
 	_, err := walk.Walker{
-		Sources:            []*yaml.RNode{from, to},
+		Sources:            []*yaml.RNode{fromCopy, to},
 		Visitor:            &copier{},
 		VisitKeysAsScalars: true}.Walk()
 	return err
@@ -25,7 +27,7 @@ func CopyComments(from, to *yaml.RNode) error {
 type copier struct{}
 
 func (c *copier) VisitMap(s walk.Sources, _ *openapi.ResourceSchema) (*yaml.RNode, error) {
-	copy(s.Dest(), s.Origin())
+	copyFieldComments(s.Dest(), s.Origin())
 	return s.Dest(), nil
 }
 
@@ -39,13 +41,13 @@ func (c *copier) VisitScalar(s walk.Sources, _ *openapi.ResourceSchema) (*yaml.R
 		to.Document().Style = yaml.DoubleQuotedStyle
 	}
 
-	copy(s.Dest(), to)
+	copyFieldComments(s.Dest(), to)
 	return s.Dest(), nil
 }
 
 func (c *copier) VisitList(s walk.Sources, _ *openapi.ResourceSchema, _ walk.ListKind) (
 	*yaml.RNode, error) {
-	copy(s.Dest(), s.Origin())
+	copyFieldComments(s.Dest(), s.Origin())
 	destItems := s.Dest().Content()
 	originItems := s.Origin().Content()
 
@@ -64,8 +66,8 @@ func (c *copier) VisitList(s walk.Sources, _ *openapi.ResourceSchema, _ walk.Lis
 	return s.Dest(), nil
 }
 
-// copy copies the comment from one field to another
-func copy(from, to *yaml.RNode) {
+// copyFieldComments copies the comment from one field to another
+func copyFieldComments(from, to *yaml.RNode) {
 	if from == nil || to == nil {
 		return
 	}