add PatchJson6902Factory to make transformer

pkg/patch/transformer/factory.go

@@ -0,0 +1,83 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package transformer
+
+import (
+	"fmt"
+
+	jsonpatch "github.com/evanphx/json-patch"
+	yamlpatch "github.com/krishicks/yaml-patch"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+
+	"github.com/kubernetes-sigs/kustomize/pkg/loader"
+	"github.com/kubernetes-sigs/kustomize/pkg/patch"
+	"github.com/kubernetes-sigs/kustomize/pkg/resource"
+	"github.com/kubernetes-sigs/kustomize/pkg/transformers"
+)
+
+// PatchJson6902Factory makes PatchJson6902 transformers.
+type PatchJson6902Factory struct {
+	targetId       resource.ResId
+	operationsYAML yamlpatch.Patch
+	operationsJSON jsonpatch.Patch
+}
+
+// NewPatchJson6902Factory returns a new PatchJson6902Factory.
+func NewPatchJson6902Factory(l loader.Loader, p patch.PatchJson6902) (*PatchJson6902Factory, error) {
+
+	if p.Target == nil {
+		return nil, fmt.Errorf("must specify the target field in patchesJson6902")
+	}
+	if p.Path != "" && p.JsonPatch != nil {
+		return nil, fmt.Errorf("cannot specify path and jsonPath at the same time")
+	}
+
+	targetId := resource.NewResIdWithPrefixNamespace(
+		schema.GroupVersionKind{
+			Group:   p.Target.Group,
+			Version: p.Target.Version,
+			Kind:    p.Target.Kind,
+		},
+		p.Target.Name,
+		"",
+		p.Target.Namespace,
+	)
+
+	if p.JsonPatch != nil {
+		return &PatchJson6902Factory{targetId: targetId, operationsYAML: p.JsonPatch}, nil
+	}
+	if p.Path != "" {
+		rawOp, err := l.Load(p.Path)
+		if err != nil {
+			return nil, err
+		}
+		patch, err := jsonpatch.DecodePatch(rawOp)
+		if err != nil {
+			return nil, err
+		}
+		return &PatchJson6902Factory{targetId: targetId, operationsJSON: patch}, nil
+	}
+	return nil, nil
+}
+
+// MakePatchJson6902Transformer returns a transformer for applying Json6902 patch
+func (f *PatchJson6902Factory) MakePatchJson6902Transformer() (transformers.Transformer, error) {
+	if f.operationsJSON != nil {
+		return newPatchJson6902JSONTransformer(f.targetId, f.operationsJSON)
+	}
+	return newPatchJson6902YAMLTransformer(f.targetId, f.operationsYAML)
+}