Add builtin JSON patch transformer

plugin/builtin/patchjson6902transformer/PatchJson6902Transformer.go

@@ -0,0 +1,36 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+//go:generate go run sigs.k8s.io/kustomize/plugin/pluginator
+package main
+
+import (
+	"sigs.k8s.io/kustomize/pkg/ifc"
+	"sigs.k8s.io/kustomize/pkg/patch"
+	"sigs.k8s.io/kustomize/pkg/patch/transformer"
+	"sigs.k8s.io/kustomize/pkg/resmap"
+	"sigs.k8s.io/yaml"
+)
+
+type plugin struct {
+	ldr     ifc.Loader
+	Patches []patch.Json6902 `json:"patches,omitempty" yaml:"patches,omitempty"`
+}
+
+var KustomizePlugin plugin
+
+func (p *plugin) Config(
+	ldr ifc.Loader, rf *resmap.Factory, c []byte) (err error) {
+	p.ldr = ldr
+	p.Patches = nil
+	return yaml.Unmarshal(c, p)
+}
+
+func (p *plugin) Transform(m resmap.ResMap) error {
+	t, err := transformer.NewPatchJson6902Factory(p.ldr).
+		MakePatchJson6902Transformer(p.Patches)
+	if err != nil {
+		return err
+	}
+	return t.Transform(m)
+}