Avoid manual step for creating array setters

kyaml/setters2/add.go

@@ -30,6 +30,9 @@ type Add struct {
 
 	// Ref is the OpenAPI reference to set on the matching fields as a comment.
 	Ref string
+
+	// ListValues are the value of a list setter.
+	ListValues []string
 }
 
 // Filter implements yaml.Filter
@@ -48,6 +51,37 @@ func (a *Add) visitSequence(_ *yaml.RNode, _ string, _ *openapi.ResourceSchema)
 	return nil
 }
 
+// visitMapping implements visitor
+// visitMapping visits the fields in input MappingNode and adds setter/subst ref
+// if the path path spec matches with input FiledName
+func (a *Add) visitMapping(object *yaml.RNode, p string, _ *openapi.ResourceSchema) error {
+	return object.VisitFields(func(node *yaml.MapNode) error {
+		if node.Value.YNode().Kind != yaml.SequenceNode {
+			return nil
+		}
+
+		key, err := node.Key.String()
+		if err != nil {
+			return err
+		}
+
+		// derive the list values for the sequence node to write it to openAPI definitions
+		var values []string
+		for _, sc := range node.Value.Content() {
+			values = append(values, sc.Value)
+		}
+		a.ListValues = values
+
+		// pathToKey refers to the path address of the key node ex: metadata.annotations
+		// p is the path till parent node, pathToKey is obtained by appending child key
+		pathToKey := p + "." + strings.Trim(key, "\n")
+		if a.FieldName != "" && strings.HasSuffix(pathToKey, a.FieldName) {
+			return a.addRef(node.Key)
+		}
+		return nil
+	})
+}
+
 // visitScalar implements visitor
 // visitScalar will set the field metadata on each scalar field whose name + value match
 func (a *Add) visitScalar(object *yaml.RNode, p string, _ *openapi.ResourceSchema) error {
@@ -58,7 +92,11 @@ func (a *Add) visitScalar(object *yaml.RNode, p string, _ *openapi.ResourceSchem
 	if a.FieldValue != "" && a.FieldValue != object.YNode().Value {
 		return nil
 	}
+	return a.addRef(object)
+}
 
+// addRef adds the setter/subst ref to the object node as a line comment
+func (a *Add) addRef(object *yaml.RNode) error {
 	// read the field metadata
 	fm := fieldmeta.FieldMeta{}
 	if err := fm.Read(object); err != nil {
@@ -85,7 +123,7 @@ type SetterDefinition struct {
 	Name string `yaml:"name"`
 
 	// Value is the value of the setter.
-	Value string `yaml:"value"`
+	Value string `yaml:"value,omitempty"`
 
 	// ListValues are the value of a list setter.
 	ListValues []string `yaml:"listValues,omitempty"`

kyaml/setters2/set.go

@@ -45,6 +45,10 @@ func (s *Set) isMatch(name string) bool {
 	return s.SetAll || s.Name == name
 }
 
+func (s *Set) visitMapping(object *yaml.RNode, p string, _ *openapi.ResourceSchema) error {
+	return nil
+}
+
 // visitSequence will perform setters for sequences
 func (s *Set) visitSequence(object *yaml.RNode, p string, schema *openapi.ResourceSchema) error {
 	ext, err := getExtFromComment(schema)

kyaml/setters2/settersutil/settercreator.go

@@ -60,16 +60,32 @@ func (c SetterCreator) Create(openAPIPath, resourcesPath string) error {
 
 	// Update the resources with the setter reference
 	inout := &kio.LocalPackageReadWriter{PackagePath: resourcesPath}
-	return kio.Pipeline{
-		Inputs: []kio.Reader{inout},
-		Filters: []kio.Filter{kio.FilterAll(
-			&setters2.Add{
-				FieldName:  c.FieldName,
-				FieldValue: c.FieldValue,
-				Ref:        fieldmeta.DefinitionsPrefix + fieldmeta.SetterDefinitionPrefix + c.Name,
-			})},
+	a := &setters2.Add{
+		FieldName:  c.FieldName,
+		FieldValue: c.FieldValue,
+		Ref:        fieldmeta.DefinitionsPrefix + fieldmeta.SetterDefinitionPrefix + c.Name,
+	}
+	err = kio.Pipeline{
+		Inputs:  []kio.Reader{inout},
+		Filters: []kio.Filter{kio.FilterAll(a)},
 		Outputs: []kio.Writer{inout},
 	}.Execute()
+
+	if err != nil {
+		return err
+	}
+
+	// if the setter is of array type write the derived list values back to
+	// openAPI definitions
+	if len(a.ListValues) > 0 {
+		sd.ListValues = a.ListValues
+		sd.Value = ""
+		if err := sd.AddToFile(openAPIPath); err != nil {
+			return err
+		}
+	}
+
+	return nil
 }
 
 // schemaFromFile reads the contents from schemaPath and returns schema

kyaml/setters2/walk.go

@@ -23,6 +23,12 @@ type visitor interface {
 	// path is the path to the field
 	// oa is the OpenAPI schema for the field
 	visitSequence(node *yaml.RNode, path string, oa *openapi.ResourceSchema) error
+
+	// visitMapping is called for each Mapping field value on a resource
+	// node is the mapping field value
+	// path is the path to the field
+	// oa is the OpenAPI schema for the field
+	visitMapping(node *yaml.RNode, path string, oa *openapi.ResourceSchema) error
 }
 
 // accept invokes the appropriate function on v for each field in object
@@ -39,6 +45,9 @@ func acceptImpl(v visitor, object *yaml.RNode, p string, oa *openapi.ResourceSch
 		// Traverse the child of the document
 		return accept(v, yaml.NewRNode(object.YNode()))
 	case yaml.MappingNode:
+		if err := v.visitMapping(object, p, oa); err != nil {
+			return err
+		}
 		return object.VisitFields(func(node *yaml.MapNode) error {
 			// get the schema for the field and propagate it
 			oa = getSchema(node.Key, oa, node.Key.YNode().Value)