Move api/builtin to internal

api/internal/builtins/LabelTransformer.go

@@ -0,0 +1,38 @@
+// Code generated by pluginator on LabelTransformer; DO NOT EDIT.
+// pluginator {unknown  1970-01-01T00:00:00Z  }
+
+package builtins
+
+import (
+	"sigs.k8s.io/kustomize/api/filters/labels"
+	"sigs.k8s.io/kustomize/api/resmap"
+	"sigs.k8s.io/kustomize/api/types"
+	"sigs.k8s.io/yaml"
+)
+
+// Add the given labels to the given field specifications.
+type LabelTransformerPlugin struct {
+	Labels     map[string]string `json:"labels,omitempty" yaml:"labels,omitempty"`
+	FieldSpecs []types.FieldSpec `json:"fieldSpecs,omitempty" yaml:"fieldSpecs,omitempty"`
+}
+
+func (p *LabelTransformerPlugin) Config(
+	_ *resmap.PluginHelpers, c []byte) (err error) {
+	p.Labels = nil
+	p.FieldSpecs = nil
+	return yaml.Unmarshal(c, p)
+}
+
+func (p *LabelTransformerPlugin) Transform(m resmap.ResMap) error {
+	if len(p.Labels) == 0 {
+		return nil
+	}
+	return m.ApplyFilter(labels.Filter{
+		Labels:  p.Labels,
+		FsSlice: p.FieldSpecs,
+	})
+}
+
+func NewLabelTransformerPlugin() resmap.TransformerPlugin {
+	return &LabelTransformerPlugin{}
+}