update vendor

Signed-off-by: Roland.Ma <rolandma@yunify.com>

vendor/sigs.k8s.io/kustomize/api/internal/target/multitransformer.go

@@ -0,0 +1,36 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package target
+
+import (
+	"sigs.k8s.io/kustomize/api/resmap"
+)
+
+// multiTransformer contains a list of transformers.
+type multiTransformer struct {
+	transformers []resmap.Transformer
+}
+
+var _ resmap.Transformer = &multiTransformer{}
+
+// newMultiTransformer constructs a multiTransformer.
+func newMultiTransformer(t []resmap.Transformer) resmap.Transformer {
+	r := &multiTransformer{
+		transformers: make([]resmap.Transformer, len(t)),
+	}
+	copy(r.transformers, t)
+	return r
+}
+
+// Transform applies the member transformers in order to the resources,
+// optionally detecting and erroring on commutation conflict.
+func (o *multiTransformer) Transform(m resmap.ResMap) error {
+	for _, t := range o.transformers {
+		if err := t.Transform(m); err != nil {
+			return err
+		}
+		m.DropEmpties()
+	}
+	return nil
+}