Merge pull request #300 from Liujingfang1/patchtransformer

Add transformer to apply json patch6902

Gopkg.lock

@@ -251,6 +251,14 @@
   revision = "ca39e5af3ece67bbcda3d0f4f56a8e24d9f2dad4"
   version = "1.1.3"
 
+[[projects]]
+  digest = "1:10e1dfc240bcd0fce14366215fd2b070e79d9b9460b27382db4423ad74204f2b"
+  name = "github.com/krishicks/yaml-patch"
+  packages = ["."]
+  pruneopts = ""
+  revision = "83cc9ac50becbbfafb86a89167f3bc5372e8e530"
+  version = "v0.0.10"
+
 [[projects]]
   branch = "master"
   digest = "1:d9e483f4b9e306facf126bd90b02d512bd22ea4471e1568867e32221a8abbb16"
@@ -495,6 +503,7 @@
     "github.com/ghodss/yaml",
     "github.com/golang/glog",
     "github.com/hashicorp/go-getter",
+    "github.com/krishicks/yaml-patch",
     "github.com/pkg/errors",
     "github.com/spf13/cobra",
     "k8s.io/api/core/v1",

Gopkg.toml

@@ -60,3 +60,7 @@
 [[constraint]]
   branch = "master"
   name = "github.com/hashicorp/go-getter"
+
+[[constraint]]
+  name = "github.com/krishicks/yaml-patch"
+  version = "0.0.10"

pkg/patch/jsonpatch.go

@@ -16,18 +16,25 @@ limitations under the License.
 
 package patch
 
+import (
+	yamlpatch "github.com/krishicks/yaml-patch"
+)
+
 // PatchJson6902 represents a json patch for an object
 // with format documented https://tools.ietf.org/html/rfc6902.
 type PatchJson6902 struct {
-	// Relative file path within the kustomization for a json patch file.
-	Path string `json:"path" yaml:"path"`
-
 	// Target refers to a Kubernetes object that the json patch will be
 	// applied to. It must refer to a Kubernetes resource under the
 	// purview of this kustomization. Target should use the
 	// raw name of the object (the name specified in its YAML,
 	// before addition of a namePrefix).
-	Target Target `json:"target" yaml:"target"`
+	Target *Target `json:"target" yaml:"target"`
+
+	// jsonPatch is a list of operations in YAML format that follows JSON 6902 rule.
+	JsonPatch yamlpatch.Patch `json:"jsonPatch,omitempty" yaml:"jsonPatch,omitempty"`
+
+	// relative file path for a json patch file inside a kustomization
+	Path string `json:"path,omitempty" yaml:"path,omitempty"`
 }
 
 // Target represents the kubernetes object that the patch is applied to

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)
+}

pkg/patch/transformer/factory_test.go

@@ -0,0 +1,156 @@
+/*
+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 (
+	"strings"
+	"testing"
+
+	yaml "gopkg.in/yaml.v2"
+
+	"github.com/kubernetes-sigs/kustomize/pkg/internal/loadertest"
+	"github.com/kubernetes-sigs/kustomize/pkg/patch"
+)
+
+func TestNewPatchJson6902FactoryNull(t *testing.T) {
+	p := patch.PatchJson6902{
+		Target: &patch.Target{
+			Name: "some-name",
+		},
+	}
+	f, err := NewPatchJson6902Factory(nil, p)
+	if err != nil {
+		t.Fatalf("unexpected error : %v", err)
+	}
+	if f != nil {
+		t.Fatal("a nil should be returned")
+	}
+}
+
+func TestNewPatchJson6902FactoryNoTarget(t *testing.T) {
+	p := patch.PatchJson6902{}
+	_, err := NewPatchJson6902Factory(nil, p)
+	if err == nil {
+		t.Fatal("expected error")
+	}
+	if !strings.Contains(err.Error(), "must specify the target field in patchesJson6902") {
+		t.Fatalf("incorrect error returned: %v", err)
+	}
+}
+
+func TestNewPatchJson6902FactoryConflict(t *testing.T) {
+	jsonPatch := []byte(`
+target:
+  name: some-name
+  kind: Deployment
+jsonPatch:
+  - op: replace
+    path: /spec/template/spec/containers/0/name
+    value: my-nginx
+  - op: add
+    path: /spec/template/spec/containers/0/command
+    value: [arg1,arg2,arg3]
+path: /some/dir/some/file
+`)
+	p := patch.PatchJson6902{}
+	err := yaml.Unmarshal(jsonPatch, &p)
+	if err != nil {
+		t.Fatalf("expected error %v", err)
+	}
+	_, err = NewPatchJson6902Factory(nil, p)
+	if err == nil {
+		t.Fatal("expected error")
+	}
+	if !strings.Contains(err.Error(), "cannot specify path and jsonPath at the same time") {
+		t.Fatalf("incorrect error returned %v", err)
+	}
+}
+
+func TestNewPatchJson6902FactoryJSON(t *testing.T) {
+	ldr := loadertest.NewFakeLoader("/testpath")
+	operations := []byte(`[
+        {"op": "replace", "path": "/spec/template/spec/containers/0/name", "value": "my-nginx"},
+        {"op": "add", "path": "/spec/replica", "value": "3"},
+        {"op": "add", "path": "/spec/template/spec/containers/0/command", "value": ["arg1", "arg2", "arg3"]}
+]`)
+	err := ldr.AddFile("/testpath/patch.json", operations)
+	if err != nil {
+		t.Fatalf("Failed to setup fake ldr.")
+	}
+
+	jsonPatch := []byte(`
+target:
+  kind: Deployment
+  name: some-name
+path: /testpath/patch.json
+`)
+	p := patch.PatchJson6902{}
+	err = yaml.Unmarshal(jsonPatch, &p)
+	if err != nil {
+		t.Fatal("expected error")
+	}
+
+	f, err := NewPatchJson6902Factory(ldr, p)
+	if err != nil {
+		t.Fatalf("unexpected error : %v", err)
+	}
+	if f == nil {
+		t.Fatalf("the returned factory shouldn't be nil ")
+	}
+
+	_, err = f.MakePatchJson6902Transformer()
+	if err != nil {
+		t.Fatalf("unexpected error : %v", err)
+	}
+}
+
+func TestNewPatchJson6902FactoryYAML(t *testing.T) {
+	jsonPatch := []byte(`
+target:
+  name: some-name
+  kind: Deployment
+jsonPatch:
+- op: replace
+  path: /spec/template/spec/containers/0/name
+  value: my-nginx
+- op: add
+  path: /spec/replica
+  value: 3
+- op: add
+  path: /spec/template/spec/containers/0/command
+  value: ["arg1", "arg2", "arg3"]
+`)
+	p := patch.PatchJson6902{}
+	err := yaml.Unmarshal(jsonPatch, &p)
+	if err != nil {
+		t.Fatalf("unexpected error : %v", err)
+	}
+
+	f, err := NewPatchJson6902Factory(nil, p)
+	if err != nil {
+		t.Fatalf("unexpected error : %v", err)
+	}
+	if f == nil {
+		t.Fatalf("the returned factory shouldn't be nil ")
+	}
+
+	_, err = f.MakePatchJson6902Transformer()
+	if err != nil {
+		t.Fatalf("unexpected error : %v", err)
+	}
+
+}

pkg/patch/transformer/patchjson6902json.go

@@ -0,0 +1,62 @@
+/*
+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 (
+	jsonpatch "github.com/evanphx/json-patch"
+
+	"github.com/kubernetes-sigs/kustomize/pkg/resmap"
+	"github.com/kubernetes-sigs/kustomize/pkg/resource"
+	"github.com/kubernetes-sigs/kustomize/pkg/transformers"
+)
+
+// patchJson6902Transformer applies patches.
+type patchJson6902JSONTransformer struct {
+	target resource.ResId
+	patch  jsonpatch.Patch
+}
+
+var _ transformers.Transformer = &patchJson6902JSONTransformer{}
+
+// newPatchJson6902JSONTransformer constructs a PatchJson6902 transformer.
+func newPatchJson6902JSONTransformer(t resource.ResId, p jsonpatch.Patch) (transformers.Transformer, error) {
+	if len(p) == 0 {
+		return transformers.NewNoOpTransformer(), nil
+	}
+	return &patchJson6902JSONTransformer{target: t, patch: p}, nil
+}
+
+// Transform apply the json patches on top of the base resources.
+func (t *patchJson6902JSONTransformer) Transform(baseResourceMap resmap.ResMap) error {
+	obj, err := findTargetObj(baseResourceMap, t.target)
+	if obj == nil {
+		return err
+	}
+	rawObj, err := obj.Unstructured.MarshalJSON()
+	if err != nil {
+		return err
+	}
+	modifiedObj, err := t.patch.Apply(rawObj)
+	if err != nil {
+		return err
+	}
+	err = obj.UnmarshalJSON(modifiedObj)
+	if err != nil {
+		return err
+	}
+	return nil
+}

pkg/patch/transformer/patchjson6902json_test.go

@@ -0,0 +1,113 @@
+/*
+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 (
+	"reflect"
+	"testing"
+
+	jsonpatch "github.com/evanphx/json-patch"
+
+	"github.com/kubernetes-sigs/kustomize/pkg/resmap"
+	"github.com/kubernetes-sigs/kustomize/pkg/resource"
+)
+
+func TestJsonPatchJSONTransformer_Transform(t *testing.T) {
+	id := resource.NewResId(deploy, "deploy1")
+	base := resmap.ResMap{
+		id: resource.NewResourceFromMap(
+			map[string]interface{}{
+				"apiVersion": "apps/v1",
+				"kind":       "Deployment",
+				"metadata": map[string]interface{}{
+					"name": "deploy1",
+				},
+				"spec": map[string]interface{}{
+					"template": map[string]interface{}{
+						"metadata": map[string]interface{}{
+							"labels": map[string]interface{}{
+								"old-label": "old-value",
+							},
+						},
+						"spec": map[string]interface{}{
+							"containers": []interface{}{
+								map[string]interface{}{
+									"name":  "nginx",
+									"image": "nginx",
+								},
+							},
+						},
+					},
+				},
+			}),
+	}
+
+	operations := []byte(`[
+        {"op": "replace", "path": "/spec/template/spec/containers/0/name", "value": "my-nginx"},
+        {"op": "add", "path": "/spec/replica", "value": "3"},
+        {"op": "add", "path": "/spec/template/spec/containers/0/command", "value": ["arg1", "arg2", "arg3"]}
+]`)
+	patch, err := jsonpatch.DecodePatch(operations)
+	if err != nil {
+		t.Fatalf("unexpected error : %v", err)
+	}
+	expected := resmap.ResMap{
+		id: resource.NewResourceFromMap(
+			map[string]interface{}{
+				"apiVersion": "apps/v1",
+				"kind":       "Deployment",
+				"metadata": map[string]interface{}{
+					"name": "deploy1",
+				},
+				"spec": map[string]interface{}{
+					"replica": "3",
+					"template": map[string]interface{}{
+						"metadata": map[string]interface{}{
+							"labels": map[string]interface{}{
+								"old-label": "old-value",
+							},
+						},
+						"spec": map[string]interface{}{
+							"containers": []interface{}{
+								map[string]interface{}{
+									"image": "nginx",
+									"name":  "my-nginx",
+									"command": []interface{}{
+										"arg1",
+										"arg2",
+										"arg3",
+									},
+								},
+							},
+						},
+					},
+				},
+			}),
+	}
+	jpt, err := newPatchJson6902JSONTransformer(id, patch)
+	if err != nil {
+		t.Fatalf("unexpected error : %v", err)
+	}
+	err = jpt.Transform(base)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if !reflect.DeepEqual(base, expected) {
+		err = expected.ErrorIfNotEqual(base)
+		t.Fatalf("actual doesn't match expected: %v", err)
+	}
+}

pkg/patch/transformer/patchjson6902yaml.go

@@ -0,0 +1,63 @@
+/*
+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 (
+	"github.com/ghodss/yaml"
+	yamlpatch "github.com/krishicks/yaml-patch"
+
+	"github.com/kubernetes-sigs/kustomize/pkg/resmap"
+	"github.com/kubernetes-sigs/kustomize/pkg/resource"
+	"github.com/kubernetes-sigs/kustomize/pkg/transformers"
+)
+
+// patchJson6902Transformer applies patches.
+type patchJson6902YAMLTransformer struct {
+	target resource.ResId
+	patch  yamlpatch.Patch
+}
+
+var _ transformers.Transformer = &patchJson6902YAMLTransformer{}
+
+// newPatchJson6902YAMLTransformer constructs a PatchJson6902 transformer.
+func newPatchJson6902YAMLTransformer(t resource.ResId, p yamlpatch.Patch) (transformers.Transformer, error) {
+	if len(p) == 0 {
+		return transformers.NewNoOpTransformer(), nil
+	}
+	return &patchJson6902YAMLTransformer{target: t, patch: p}, nil
+}
+
+// Transform apply the json patches on top of the base resources.
+func (t *patchJson6902YAMLTransformer) Transform(baseResourceMap resmap.ResMap) error {
+	obj, err := findTargetObj(baseResourceMap, t.target)
+	if obj == nil {
+		return err
+	}
+	rawObj, err := yaml.Marshal(obj.Unstructured.Object)
+	if err != nil {
+		return err
+	}
+	modifiedObj, err := t.patch.Apply(rawObj)
+	if err != nil {
+		return err
+	}
+	err = yaml.Unmarshal(modifiedObj, &obj.Unstructured.Object)
+	if err != nil {
+		return err
+	}
+	return nil
+}

pkg/patch/transformer/patchjson6902yaml_test.go

@@ -0,0 +1,128 @@
+/*
+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 (
+	"reflect"
+	"testing"
+
+	yamlpatch "github.com/krishicks/yaml-patch"
+	"github.com/kubernetes-sigs/kustomize/pkg/resmap"
+	"github.com/kubernetes-sigs/kustomize/pkg/resource"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+var deploy = schema.GroupVersionKind{Group: "apps", Version: "v1", Kind: "Deployment"}
+
+func TestJsonPatchYAMLTransformer_Transform(t *testing.T) {
+	id := resource.NewResId(deploy, "deploy1")
+	base := resmap.ResMap{
+		id: resource.NewResourceFromMap(
+			map[string]interface{}{
+				"apiVersion": "apps/v1",
+				"kind":       "Deployment",
+				"metadata": map[string]interface{}{
+					"name": "deploy1",
+				},
+				"spec": map[string]interface{}{
+					"template": map[string]interface{}{
+						"metadata": map[string]interface{}{
+							"labels": map[string]interface{}{
+								"old-label": "old-value",
+							},
+						},
+						"spec": map[string]interface{}{
+							"containers": []interface{}{
+								map[string]interface{}{
+									"name":  "nginx",
+									"image": "nginx",
+								},
+							},
+						},
+					},
+				},
+			}),
+	}
+
+	var image, replica, command interface{}
+	image = "my-nginx"
+	replica = "3"
+	command = []string{"arg1", "arg2", "arg3"}
+	patch := yamlpatch.Patch{
+		{
+			Op:    "replace",
+			Path:  "/spec/template/spec/containers/0/name",
+			Value: yamlpatch.NewNode(&image),
+		},
+		{
+			Op:    "add",
+			Path:  "/spec/replica",
+			Value: yamlpatch.NewNode(&replica),
+		},
+		{
+			Op:    "add",
+			Path:  "/spec/template/spec/containers/0/command",
+			Value: yamlpatch.NewNode(&command),
+		},
+	}
+
+	expected := resmap.ResMap{
+		id: resource.NewResourceFromMap(
+			map[string]interface{}{
+				"apiVersion": "apps/v1",
+				"kind":       "Deployment",
+				"metadata": map[string]interface{}{
+					"name": "deploy1",
+				},
+				"spec": map[string]interface{}{
+					"replica": "3",
+					"template": map[string]interface{}{
+						"metadata": map[string]interface{}{
+							"labels": map[string]interface{}{
+								"old-label": "old-value",
+							},
+						},
+						"spec": map[string]interface{}{
+							"containers": []interface{}{
+								map[string]interface{}{
+									"image": "nginx",
+									"name":  "my-nginx",
+									"command": []interface{}{
+										"arg1",
+										"arg2",
+										"arg3",
+									},
+								},
+							},
+						},
+					},
+				},
+			}),
+	}
+	jpt, err := newPatchJson6902YAMLTransformer(id, patch)
+	if err != nil {
+		t.Fatalf("unexpected error : %v", err)
+	}
+	err = jpt.Transform(base)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if !reflect.DeepEqual(base, expected) {
+		err = expected.ErrorIfNotEqual(base)
+		t.Fatalf("actual doesn't match expected: %v", err)
+	}
+}

pkg/patch/transformer/util.go

@@ -0,0 +1,47 @@
+/*
+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"
+	"log"
+
+	"github.com/kubernetes-sigs/kustomize/pkg/resmap"
+	"github.com/kubernetes-sigs/kustomize/pkg/resource"
+)
+
+func findTargetObj(m resmap.ResMap, targetId resource.ResId) (*resource.Resource, error) {
+	matchedIds := m.FindByGVKN(targetId)
+	if targetId.Namespace() != "" {
+		ids := []resource.ResId{}
+		for _, id := range matchedIds {
+			if id.Namespace() == targetId.Namespace() {
+				ids = append(ids, id)
+			}
+		}
+		matchedIds = ids
+	}
+
+	if len(matchedIds) == 0 {
+		log.Printf("Couldn't find any object to apply the json patch %v, skipping it.", targetId)
+		return nil, nil
+	}
+	if len(matchedIds) > 1 {
+		return nil, fmt.Errorf("found multiple objects that the patch can apply %v", matchedIds)
+	}
+	return m[matchedIds[0]], nil
+}

vendor/github.com/krishicks/yaml-patch/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
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+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
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+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
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+      including but not limited to software source code, documentation
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+      of this License, Derivative Works shall not include works that remain
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+      the conditions stated in this License.
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+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
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+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
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+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+      risks associated with Your exercise of permissions under this License.
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+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
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+      on Your own behalf and on Your sole responsibility, not on behalf
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+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "{}"
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+      file or class name and description of purpose be included on the
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+
+   Copyright {yyyy} {name of copyright owner}
+
+   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.

vendor/github.com/krishicks/yaml-patch/Makefile

@@ -0,0 +1,17 @@
+CGO_ENABLED=0
+
+all: windows linux darwin
+
+linux:
+	GOOS=linux GOARCH=amd64 go build -o yaml_patch_linux cmd/yaml-patch/*.go
+
+windows:
+	GOOS=windows GOARCH=amd64 go build -o yaml_patch.exe cmd/yaml-patch/*.go
+
+darwin:
+	GOOS=darwin GOARCH=amd64 go build -o yaml_patch_darwin cmd/yaml-patch/*.go
+
+clean:
+	rm yaml_patch_linux
+	rm yaml_patch.exe
+	rm yaml_patch_darwin

vendor/github.com/krishicks/yaml-patch/README.md

@@ -0,0 +1,86 @@
+# yaml-patch
+
+`yaml-patch` is a version of Evan Phoenix's
+[json-patch](https://github.com/evanphx/json-patch), which is an implementation
+of [JavaScript Object Notation (JSON) Patch](https://tools.ietf.org/html/rfc6902),
+but for YAML.
+
+
+## Installing
+
+`go get github.com/krishicks/yaml-patch`
+
+If you want to use the CLI:
+
+`go get github.com/krishicks/yaml-patch/cmd/yaml-patch`
+
+## API
+
+Given the following RFC6902-ish YAML document, `ops`:
+
+```
+---
+- op: add
+  path: /baz/waldo
+  value: fred
+```
+
+And the following YAML that is to be modified, `src`:
+
+```
+---
+foo: bar
+baz:
+  quux: grault
+```
+
+Decode the ops file into a patch:
+
+```
+patch, err := yamlpatch.DecodePatch(ops)
+// handle err
+```
+
+Then apply that patch to the document:
+
+```
+dst, err := patch.Apply(src)
+// handle err
+
+// do something with dst
+```
+
+### Example
+
+```
+doc := []byte(`---
+foo: bar
+baz:
+  quux: grault
+`)
+
+ops := []byte(`---
+- op: add
+  path: /baz/waldo
+  value: fred
+`)
+
+patch, err := yamlpatch.DecodePatch(ops)
+if err != nil {
+  log.Fatalf("decoding patch failed: %s", err)
+}
+
+bs, err := patch.Apply(doc)
+if err != nil {
+  log.Fatalf("applying patch failed: %s", err)
+}
+
+fmt.Println(string(bs))
+```
+
+```
+baz:
+  quux: grault
+  waldo: fred
+foo: bar
+```

vendor/github.com/krishicks/yaml-patch/cmd/yaml-patch/file_flag.go

@@ -0,0 +1,39 @@
+package main
+
+// Thanks, Concourse!
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+// FileFlag is a flag for passing a path to a file on disk. The file is
+// expected to be a file, not a directory, that actually exists.
+type FileFlag string
+
+// UnmarshalFlag implements go-flag's Unmarshaler interface
+func (f *FileFlag) UnmarshalFlag(value string) error {
+	stat, err := os.Stat(value)
+	if err != nil {
+		return err
+	}
+
+	if stat.IsDir() {
+		return fmt.Errorf("path '%s' is a directory, not a file", value)
+	}
+
+	abs, err := filepath.Abs(value)
+	if err != nil {
+		return err
+	}
+
+	*f = FileFlag(abs)
+
+	return nil
+}
+
+// Path is the path to the file
+func (f FileFlag) Path() string {
+	return string(f)
+}

vendor/github.com/krishicks/yaml-patch/cmd/yaml-patch/main.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+
+	flags "github.com/jessevdk/go-flags"
+	yamlpatch "github.com/krishicks/yaml-patch"
+)
+
+type opts struct {
+	OpsFiles []FileFlag `long:"ops-file" short:"o" value-name:"PATH" description:"Path to file with one or more operations"`
+}
+
+func main() {
+	var o opts
+	_, err := flags.Parse(&o)
+	if err != nil {
+		log.Fatalf("error: %s\n", err)
+	}
+
+	placeholderWrapper := yamlpatch.NewPlaceholderWrapper("{{", "}}")
+
+	var patches []yamlpatch.Patch
+	for _, opsFile := range o.OpsFiles {
+		var bs []byte
+		bs, err = ioutil.ReadFile(opsFile.Path())
+		if err != nil {
+			log.Fatalf("error reading opsfile: %s", err)
+		}
+
+		var patch yamlpatch.Patch
+		patch, err = yamlpatch.DecodePatch(placeholderWrapper.Wrap(bs))
+		if err != nil {
+			log.Fatalf("error decoding opsfile: %s", err)
+		}
+
+		patches = append(patches, patch)
+	}
+
+	doc, err := ioutil.ReadAll(os.Stdin)
+	if err != nil {
+		log.Fatalf("error reading from stdin: %s", err)
+	}
+
+	mdoc := placeholderWrapper.Wrap(doc)
+	for _, patch := range patches {
+		mdoc, err = patch.Apply(mdoc)
+		if err != nil {
+			log.Fatalf("error applying patch: %s", err)
+		}
+	}
+
+	fmt.Printf("%s", placeholderWrapper.Unwrap(mdoc))
+}

vendor/github.com/krishicks/yaml-patch/cmd/yaml-patch/main_suite_test.go

@@ -0,0 +1,18 @@
+package main_test
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	"github.com/onsi/gomega/gexec"
+
+	"testing"
+)
+
+var _ = AfterSuite(func() {
+	gexec.CleanupBuildArtifacts()
+})
+
+func TestMain(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Main Suite")
+}

vendor/github.com/krishicks/yaml-patch/cmd/yaml-patch/main_test.go

@@ -0,0 +1,14 @@
+package main_test
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	"github.com/onsi/gomega/gexec"
+)
+
+var _ = Describe("yaml-patch", func() {
+	It("builds", func() {
+		_, err := gexec.Build("github.com/krishicks/yaml-patch/cmd/yaml-patch")
+		Expect(err).NotTo(HaveOccurred())
+	})
+})

vendor/github.com/krishicks/yaml-patch/container.go

@@ -0,0 +1,167 @@
+package yamlpatch
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// Container is the interface for performing operations on Nodes
+type Container interface {
+	Get(key string) (*Node, error)
+	Set(key string, val *Node) error
+	Add(key string, val *Node) error
+	Remove(key string) error
+}
+
+type nodeMap map[interface{}]*Node
+
+func (n *nodeMap) Set(key string, val *Node) error {
+	(*n)[key] = val
+	return nil
+}
+
+func (n *nodeMap) Add(key string, val *Node) error {
+	(*n)[key] = val
+	return nil
+}
+
+func (n *nodeMap) Get(key string) (*Node, error) {
+	return (*n)[key], nil
+}
+
+func (n *nodeMap) Remove(key string) error {
+	_, ok := (*n)[key]
+	if !ok {
+		return fmt.Errorf("Unable to remove nonexistent key: %s", key)
+	}
+
+	delete(*n, key)
+	return nil
+}
+
+type nodeSlice []*Node
+
+func (n *nodeSlice) Set(index string, val *Node) error {
+	i, err := strconv.Atoi(index)
+	if err != nil {
+		return err
+	}
+
+	sz := len(*n)
+	if i+1 > sz {
+		sz = i + 1
+	}
+
+	ary := make([]*Node, sz)
+
+	cur := *n
+
+	copy(ary, cur)
+
+	if i >= len(ary) {
+		return fmt.Errorf("Unable to access invalid index: %d", i)
+	}
+
+	ary[i] = val
+
+	*n = ary
+	return nil
+}
+
+func (n *nodeSlice) Add(index string, val *Node) error {
+	if index == "-" {
+		*n = append(*n, val)
+		return nil
+	}
+
+	i, err := strconv.Atoi(index)
+	if err != nil {
+		return err
+	}
+
+	ary := make([]*Node, len(*n)+1)
+
+	cur := *n
+
+	copy(ary[0:i], cur[0:i])
+	ary[i] = val
+	copy(ary[i+1:], cur[i:])
+
+	*n = ary
+	return nil
+}
+
+func (n *nodeSlice) Get(index string) (*Node, error) {
+	i, err := strconv.Atoi(index)
+	if err != nil {
+		return nil, err
+	}
+
+	if i >= 0 && i <= len(*n)-1 {
+		return (*n)[i], nil
+	}
+
+	return nil, fmt.Errorf("Unable to access invalid index: %d", i)
+}
+
+func (n *nodeSlice) Remove(index string) error {
+	i, err := strconv.Atoi(index)
+	if err != nil {
+		return err
+	}
+
+	cur := *n
+
+	if i >= len(cur) {
+		return fmt.Errorf("Unable to remove invalid index: %d", i)
+	}
+
+	ary := make([]*Node, len(cur)-1)
+
+	copy(ary[0:i], cur[0:i])
+	copy(ary[i:], cur[i+1:])
+
+	*n = ary
+	return nil
+
+}
+
+func findContainer(c Container, path *OpPath) (Container, string, error) {
+	parts, key, err := path.Decompose()
+	if err != nil {
+		return nil, "", err
+	}
+
+	foundContainer := c
+
+	for _, part := range parts {
+		node, err := foundContainer.Get(decodePatchKey(part))
+		if err != nil {
+			return nil, "", err
+		}
+
+		if node == nil {
+			return nil, "", fmt.Errorf("path does not exist: %s", path)
+		}
+
+		foundContainer = node.Container()
+	}
+
+	return foundContainer, decodePatchKey(key), nil
+}
+
+// From http://tools.ietf.org/html/rfc6901#section-4 :
+//
+// Evaluation of each reference token begins by decoding any escaped
+// character sequence.  This is performed by first transforming any
+// occurrence of the sequence '~1' to '/', and then transforming any
+// occurrence of the sequence '~0' to '~'.
+
+var (
+	rfc6901Decoder = strings.NewReplacer("~1", "/", "~0", "~")
+)
+
+func decodePatchKey(k string) string {
+	return rfc6901Decoder.Replace(k)
+}

vendor/github.com/krishicks/yaml-patch/node.go

@@ -0,0 +1,83 @@
+package yamlpatch
+
+import "reflect"
+
+// Node holds a YAML document that has not yet been processed into a NodeMap or
+// NodeSlice
+type Node struct {
+	raw       *interface{}
+	container Container
+}
+
+// NewNode returns a new Node. It expects a pointer to an interface{}
+func NewNode(raw *interface{}) *Node {
+	return &Node{
+		raw: raw,
+	}
+}
+
+// MarshalYAML implements yaml.Marshaler, and returns the correct interface{}
+// to be marshaled
+func (n *Node) MarshalYAML() (interface{}, error) {
+	if n.container != nil {
+		return n.container, nil
+	}
+
+	return *n.raw, nil
+}
+
+// UnmarshalYAML implements yaml.Unmarshaler
+func (n *Node) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var data interface{}
+
+	err := unmarshal(&data)
+	if err != nil {
+		return err
+	}
+
+	n.raw = &data
+	return nil
+}
+
+// Empty returns whether the raw value is nil
+func (n *Node) Empty() bool {
+	return *n.raw == nil
+}
+
+// Container returns the node as a Container
+func (n *Node) Container() Container {
+	if n.container != nil {
+		return n.container
+	}
+
+	switch rt := (*n.raw).(type) {
+	case []interface{}:
+		c := make(nodeSlice, len(rt))
+		n.container = &c
+
+		for i := range rt {
+			c[i] = NewNode(&rt[i])
+		}
+	case map[interface{}]interface{}:
+		c := make(nodeMap, len(rt))
+		n.container = &c
+
+		for k := range rt {
+			v := rt[k]
+			c[k] = NewNode(&v)
+		}
+	}
+
+	return n.container
+}
+
+// Equal compares the values of the raw interfaces that the YAML was
+// unmarshaled into
+func (n *Node) Equal(other *Node) bool {
+	return reflect.DeepEqual(*n.raw, *other.raw)
+}
+
+// Value returns the raw value of the node
+func (n *Node) Value() interface{} {
+	return *n.raw
+}

vendor/github.com/krishicks/yaml-patch/operation.go

@@ -0,0 +1,181 @@
+package yamlpatch
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+)
+
+// Op is a type alias
+type Op string
+
+// Ops
+const (
+	opAdd     Op = "add"
+	opRemove  Op = "remove"
+	opReplace Op = "replace"
+	opMove    Op = "move"
+	opCopy    Op = "copy"
+	opTest    Op = "test"
+)
+
+// OpPath is an RFC6902 'pointer'
+type OpPath string
+
+// Decompose returns the pointer's components:
+// "/foo" => [], "foo"
+// "/foo/1" => ["foo"], "1"
+// "/foo/1/bar" => ["foo", "1"], "bar"
+func (p *OpPath) Decompose() ([]string, string, error) {
+	path := string(*p)
+
+	if !strings.HasPrefix(path, "/") {
+		return nil, "", fmt.Errorf("operation path is missing leading '/': %s", path)
+	}
+
+	parts := strings.Split(path, "/")[1:]
+
+	return parts[:len(parts)-1], parts[len(parts)-1], nil
+}
+
+// ContainsExtendedSyntax returns whether the OpPath uses the "key=value"
+// format, as in "/foo/name=bar", where /foo points at an array that contains
+// an object with a key "name" that has a value "bar"
+func (p *OpPath) ContainsExtendedSyntax() bool {
+	return strings.Contains(string(*p), "=")
+}
+
+// String returns the OpPath as a string
+func (p *OpPath) String() string {
+	return string(*p)
+}
+
+// Operation is an RFC6902 'Operation'
+// https://tools.ietf.org/html/rfc6902#section-4
+type Operation struct {
+	Op    Op     `yaml:"op,omitempty"`
+	Path  OpPath `yaml:"path,omitempty"`
+	From  OpPath `yaml:"from,omitempty"`
+	Value *Node  `yaml:"value,omitempty"`
+}
+
+// Perform executes the operation on the given container
+func (o *Operation) Perform(c Container) error {
+	var err error
+
+	switch o.Op {
+	case opAdd:
+		err = tryAdd(c, o)
+	case opRemove:
+		err = tryRemove(c, o)
+	case opReplace:
+		err = tryReplace(c, o)
+	case opMove:
+		err = tryMove(c, o)
+	case opCopy:
+		err = tryCopy(c, o)
+	case opTest:
+		err = tryTest(c, o)
+	default:
+		err = fmt.Errorf("Unexpected op: %s", o.Op)
+	}
+
+	return err
+}
+
+func tryAdd(doc Container, op *Operation) error {
+	con, key, err := findContainer(doc, &op.Path)
+	if err != nil {
+		return fmt.Errorf("yamlpatch add operation does not apply: doc is missing path: %s", op.Path)
+	}
+
+	return con.Add(key, op.Value)
+}
+
+func tryRemove(doc Container, op *Operation) error {
+	con, key, err := findContainer(doc, &op.Path)
+	if err != nil {
+		return fmt.Errorf("yamlpatch remove operation does not apply: doc is missing path: %s", op.Path)
+	}
+
+	return con.Remove(key)
+}
+
+func tryReplace(doc Container, op *Operation) error {
+	con, key, err := findContainer(doc, &op.Path)
+	if err != nil {
+		return fmt.Errorf("yamlpatch replace operation does not apply: doc is missing path: %s", op.Path)
+	}
+
+	val, err := con.Get(key)
+	if val == nil || err != nil {
+		return fmt.Errorf("yamlpatch replace operation does not apply: doc is missing key: %s", op.Path)
+	}
+
+	return con.Set(key, op.Value)
+}
+
+func tryMove(doc Container, op *Operation) error {
+	con, key, err := findContainer(doc, &op.From)
+	if err != nil {
+		return fmt.Errorf("yamlpatch move operation does not apply: doc is missing from path: %s", op.From)
+	}
+
+	val, err := con.Get(key)
+	if err != nil {
+		return err
+	}
+
+	err = con.Remove(key)
+	if err != nil {
+		return err
+	}
+
+	con, key, err = findContainer(doc, &op.Path)
+	if err != nil {
+		return fmt.Errorf("yamlpatch move operation does not apply: doc is missing destination path: %s", op.Path)
+	}
+
+	return con.Set(key, val)
+}
+
+func tryCopy(doc Container, op *Operation) error {
+	con, key, err := findContainer(doc, &op.From)
+	if err != nil {
+		return fmt.Errorf("copy operation does not apply: doc is missing from path: %s", op.From)
+	}
+
+	val, err := con.Get(key)
+	if err != nil {
+		return err
+	}
+
+	con, key, err = findContainer(doc, &op.Path)
+	if err != nil {
+		return fmt.Errorf("copy operation does not apply: doc is missing destination path: %s", op.Path)
+	}
+
+	return con.Set(key, val)
+}
+
+func tryTest(doc Container, op *Operation) error {
+	con, key, err := findContainer(doc, &op.Path)
+	if err != nil {
+		return fmt.Errorf("test operation does not apply: doc is missing from path: %s", op.From)
+	}
+
+	val, err := con.Get(key)
+	if err != nil {
+		return err
+	}
+
+	if op.Value.Empty() && val == nil {
+		return nil
+	}
+
+	if op.Value.Equal(val) {
+		return nil
+	}
+
+	return errors.New("test failed")
+}

vendor/github.com/krishicks/yaml-patch/patch.go

@@ -0,0 +1,60 @@
+package yamlpatch
+
+import (
+	"fmt"
+
+	yaml "gopkg.in/yaml.v2"
+)
+
+// Patch is an ordered collection of operations.
+type Patch []Operation
+
+// DecodePatch decodes the passed YAML document as if it were an RFC 6902 patch
+func DecodePatch(bs []byte) (Patch, error) {
+	var p Patch
+
+	err := yaml.Unmarshal(bs, &p)
+	if err != nil {
+		return nil, err
+	}
+
+	return p, nil
+}
+
+// Apply returns a YAML document that has been mutated per the patch
+func (p Patch) Apply(doc []byte) ([]byte, error) {
+	var iface interface{}
+	err := yaml.Unmarshal(doc, &iface)
+	if err != nil {
+		return nil, fmt.Errorf("failed unmarshaling doc: %s\n\n%s", string(doc), err)
+	}
+
+	var c Container
+	c = NewNode(&iface).Container()
+
+	for _, op := range p {
+		pathfinder := NewPathFinder(c)
+		if op.Path.ContainsExtendedSyntax() {
+			paths := pathfinder.Find(string(op.Path))
+			if paths == nil {
+				return nil, fmt.Errorf("could not expand pointer: %s", op.Path)
+			}
+
+			for _, path := range paths {
+				newOp := op
+				newOp.Path = OpPath(path)
+				err = newOp.Perform(c)
+				if err != nil {
+					return nil, err
+				}
+			}
+		} else {
+			err = op.Perform(c)
+			if err != nil {
+				return nil, err
+			}
+		}
+	}
+
+	return yaml.Marshal(c)
+}

vendor/github.com/krishicks/yaml-patch/patch_test.go

@@ -0,0 +1,606 @@
+package yamlpatch_test
+
+import (
+	yamlpatch "github.com/krishicks/yaml-patch"
+	yaml "gopkg.in/yaml.v2"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/ginkgo/extensions/table"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Patch", func() {
+	Describe("Apply", func() {
+		DescribeTable(
+			"positive cases",
+			func(doc, ops, expectedYAML string) {
+				patch, err := yamlpatch.DecodePatch([]byte(ops))
+				Expect(err).NotTo(HaveOccurred())
+
+				actualBytes, err := patch.Apply([]byte(doc))
+				Expect(err).NotTo(HaveOccurred())
+
+				var actualIface interface{}
+				err = yaml.Unmarshal(actualBytes, &actualIface)
+				Expect(err).NotTo(HaveOccurred())
+
+				var expectedIface interface{}
+				err = yaml.Unmarshal([]byte(expectedYAML), &expectedIface)
+				Expect(err).NotTo(HaveOccurred())
+
+				Expect(actualIface).To(Equal(expectedIface))
+			},
+			Entry("adding an element to an object",
+				`---
+foo: bar
+`,
+				`---
+- op: add
+  path: /baz
+  value: qux
+`,
+				`---
+foo: bar
+baz: qux
+`,
+			),
+			Entry("adding an element to an array",
+				`---
+foo: [bar,baz]
+`,
+				`---
+- op: add
+  path: /foo/1
+  value: qux
+`,
+				`---
+foo: [bar,qux,baz]
+`,
+			),
+			Entry("removing an element from an object",
+				`---
+foo: bar
+baz: qux
+`,
+				`---
+- op: remove
+  path: /baz
+`,
+				`---
+foo: bar
+`,
+			),
+			Entry("removing an element from an array",
+				`---
+foo: [bar,qux,baz]
+`,
+				`---
+- op: remove
+  path: /foo/1
+`,
+				`---
+foo: [bar,baz]
+`,
+			),
+			Entry("replacing an element in an object",
+				`---
+foo: bar
+baz: qux
+`,
+				`---
+- op: replace
+  path: /baz
+  value: boo
+`,
+				`---
+foo: bar
+baz: boo
+`,
+			),
+			Entry("moving an element in an object",
+				`---
+foo:
+  bar: baz
+  waldo: fred
+qux:
+  corge: grault
+`,
+				`---
+- op: move
+  from: /foo/waldo
+  path: /qux/thud
+`,
+				`---
+foo:
+  bar: baz
+qux:
+  corge: grault
+  thud: fred
+`,
+			),
+			Entry("moving an element in an array",
+				`---
+foo: [all, grass, cows, eat]
+`,
+				`---
+- op: move
+  from: /foo/1
+  path: /foo/3
+`,
+				`---
+foo: [all, cows, eat, grass]
+`,
+			),
+			Entry("adding an object to an object",
+				`---
+foo: bar
+`,
+				`---
+- op: add
+  path: /child
+  value:
+    grandchild: {}
+`,
+				`---
+foo: bar
+child:
+  grandchild: {}
+`,
+			),
+			Entry("appending an element to an array",
+				`---
+foo: [bar]
+`,
+				`---
+- op: add
+  path: /foo/-
+  value: [abc,def]
+`,
+				`---
+foo: [bar, [abc, def]]
+`,
+			),
+			Entry("removing a nil element from an object",
+				`---
+foo: bar
+qux:
+  baz: 1
+  bar: ~
+`,
+				`---
+- op: remove
+  path: /qux/bar
+`,
+				`---
+foo: bar
+qux:
+  baz: 1
+`,
+			),
+			Entry("adding a nil element to an object",
+				`---
+foo: bar
+`,
+				`---
+- op: add
+  path: /baz
+  value: ~
+`,
+				`---
+foo: bar
+baz: ~
+`,
+			),
+			Entry("replacing the sole element in an array",
+				`---
+foo: [bar]
+`,
+				`---
+- op: replace
+  path: /foo/0
+  value: baz
+`,
+				`---
+foo: [baz]
+`,
+			),
+			Entry("replacing an element in an array within a root array",
+				`---
+- foo: [bar, qux, baz]
+`,
+				`---
+- op: replace
+  path: /0/foo/0
+  value: bum
+`,
+				`---
+- foo: [bum, qux, baz]
+`,
+			),
+			Entry("copying an element in an array within a root array with an index",
+				`---
+- foo: [bar, qux, baz]
+  bar: [qux, baz]
+`,
+				`---
+- op: copy
+  from: /0/foo/0
+  path: /0/bar/0
+`,
+				`---
+- foo: [bar, qux, baz]
+  bar: [bar, baz]
+`,
+			),
+			Entry("testing for the existence of a nil value in an object",
+				`---
+baz: ~
+`,
+				`---
+- op: test
+  path: /baz
+  value: ~
+`,
+				`---
+baz: ~
+`,
+			),
+			Entry("testing for the existence of a nil key in an object",
+				`---
+baz: ~
+`,
+				`---
+- op: test
+  path: /foo
+  value: ~
+`,
+				`---
+baz: ~
+`,
+			),
+			Entry("testing for the existence of a nil value in an object",
+				`---
+baz: qux
+`,
+				`---
+- op: test
+  path: /baz
+  value: qux
+`,
+				`---
+baz: qux
+`,
+			),
+			Entry("testing for the existence of an element in an array",
+				`---
+foo: [a, 2, c]
+`,
+				`---
+- op: test
+  path: /foo/1
+  value: 2
+`,
+				`---
+foo: [a, 2, c]
+`,
+			),
+			Entry("testing for the existence of an element in an object using escape ordering",
+				`---
+baz/foo: qux
+`,
+				`---
+- op: test
+  path: /baz~1foo
+  value: qux
+`,
+				`---
+baz/foo: qux
+`,
+			),
+			Entry("testing for the existence of an object",
+				`---
+foo:
+  - bar: baz
+    qux: corge
+`,
+				`---
+- op: test
+  path: /foo/0
+  value:
+    bar: baz
+    qux: corge
+`,
+				`---
+foo:
+  - bar: baz
+    qux: corge
+`,
+			),
+			XEntry("copying an element in an array within a root array to a destination without an index",
+				// this is in jsonpatch, but I'd like confirmation from the spec that this is intended
+				`---
+- foo: [bar, qux, baz]
+  bar: [qux, baz]
+`,
+				`---
+- op: copy
+  from: /0/foo/0
+  path: /0/bar
+`,
+				`---
+- foo: [bar, qux, baz]
+  bar: [bar, qux, baz]
+`,
+			),
+			XEntry("copying an element in an array within a root array to a destination without an index",
+				`---
+- foo:
+  bar: [qux, baz]
+  baz:
+    qux: bum
+`,
+				`---
+- op: copy
+  from: /0/foo/bar
+  path: /0/baz/bar
+`,
+				`---
+- foo: [bar, qux, baz]
+  bar: [bar, qux, baz]
+`,
+			),
+		)
+
+		DescribeTable(
+			"with extended syntax",
+			func(doc, ops, expectedYAML string) {
+				patch, err := yamlpatch.DecodePatch([]byte(ops))
+				Expect(err).NotTo(HaveOccurred())
+
+				actualBytes, err := patch.Apply([]byte(doc))
+				Expect(err).NotTo(HaveOccurred())
+
+				var actualIface interface{}
+				err = yaml.Unmarshal(actualBytes, &actualIface)
+				Expect(err).NotTo(HaveOccurred())
+
+				var expectedIface interface{}
+				err = yaml.Unmarshal([]byte(expectedYAML), &expectedIface)
+				Expect(err).NotTo(HaveOccurred())
+
+				Expect(actualIface).To(Equal(expectedIface))
+			},
+			Entry("a path that begins with a composite key",
+				`---
+- foo: bar
+`,
+				`---
+- op: replace
+  path: /foo=bar
+  value:
+    baz: quux
+`,
+				`---
+- baz: quux
+`,
+			),
+			Entry("a path that begins with an array index and ends with a composite key",
+				`---
+- waldo:
+    - thud: boo
+    - foo: bar
+- corge: grault
+`,
+				`---
+- op: replace
+  path: /0/foo=bar
+  value:
+    baz: quux
+`,
+				`---
+- waldo:
+    - thud: boo
+    - baz: quux
+- corge: grault
+`,
+			),
+			Entry("a path that begins with an object key and ends with a composite key",
+				`---
+waldo:
+  - thud: boo
+  - foo: bar
+corge: grault
+`,
+				`---
+- op: replace
+  path: /waldo/foo=bar
+  value:
+    baz: quux
+`,
+				`---
+waldo:
+  - thud: boo
+  - baz: quux
+corge: grault
+`,
+			),
+			Entry("a path that doesn't end with a composite key",
+				`---
+jobs:
+- name: upgrade-opsmgr
+  serial: true
+  plan:
+  - get: pivnet-opsmgr
+  - put: something-else
+`,
+				`---
+- op: replace
+  path: /jobs/name=upgrade-opsmgr/plan/1
+  value:
+    get: something-else
+`,
+				`---
+jobs:
+- name: upgrade-opsmgr
+  serial: true
+  plan:
+  - get: pivnet-opsmgr
+  - get: something-else
+`,
+			),
+			Entry("removes multiple entries in a single op",
+				`---
+foo:
+  - bar: baz
+  - waldo: fred
+qux:
+  corge: grault
+  thud:
+    - waldo: fred
+    - bar: baz
+`,
+				`---
+- op: remove
+  path: /waldo=fred
+`,
+				`---
+foo:
+  - bar: baz
+qux:
+  corge: grault
+  thud:
+    - bar: baz
+`,
+			),
+		)
+
+		DescribeTable(
+			"failure cases",
+			func(doc, ops string) {
+				patch, err := yamlpatch.DecodePatch([]byte(ops))
+				Expect(err).NotTo(HaveOccurred())
+
+				_, err = patch.Apply([]byte(doc))
+				Expect(err).To(HaveOccurred())
+			},
+			Entry("adding an element to an object with a bad pointer",
+				`---
+foo: bar
+`,
+				`---
+- op: add
+  path: /baz/bat
+  value: qux
+`,
+			),
+			Entry("removing an element from an object with a bad pointer",
+				`---
+a:
+  b:
+    d: 1
+`,
+				`---
+- op: remove
+  path: /a/b/c
+`,
+			),
+			Entry("moving an element in an object with a bad pointer",
+				`---
+a:
+  b:
+    d: 1
+`,
+				`---
+- op: move
+  from: /a/b/c
+  path: /a/b/e
+`,
+			),
+			Entry("removing an element from an array with a bad pointer",
+				`---
+a:
+  b: [1]
+`,
+				`---
+- op: remove
+  path: /a/b/1
+`,
+			),
+			Entry("moving an element from an array with a bad pointer",
+				`---
+a:
+  b: [1]
+`,
+				`---
+- op: move
+  from: /a/b/1
+  path: /a/b/2
+`,
+			),
+			Entry("an operation with an invalid pathz field",
+				`---
+foo: bar
+`,
+				`---
+- op: add
+  pathz: /baz
+  value: qux
+`,
+			),
+			Entry("an add operation with an empty path",
+				`---
+foo: bar
+`,
+				`---
+- op: add
+  path: ''
+  value: qux
+`,
+			),
+			Entry("a replace operation on an array with an invalid path",
+				`---
+name:
+  foo:
+    bat
+  qux:
+    bum
+`,
+				`---
+- op: replace
+  path: /foo/2
+  value: bum
+`,
+			),
+		)
+	})
+
+	Describe("DecodePatch", func() {
+		It("returns an empty patch when given nil", func() {
+			patch, err := yamlpatch.DecodePatch(nil)
+			Expect(err).NotTo(HaveOccurred())
+
+			Expect(patch).To(HaveLen(0))
+		})
+
+		It("returns a patch with a single op when given a single op", func() {
+			ops := []byte(
+				`---
+- op: add
+  path: /baz
+  value: qux`)
+
+			patch, err := yamlpatch.DecodePatch(ops)
+			Expect(err).NotTo(HaveOccurred())
+
+			var v interface{} = "qux"
+			value := yamlpatch.NewNode(&v)
+			Expect(patch).To(Equal(yamlpatch.Patch{
+				{
+					Op:    "add",
+					Path:  "/baz",
+					Value: value,
+				},
+			}))
+		})
+	})
+})

vendor/github.com/krishicks/yaml-patch/pathfinder.go

@@ -0,0 +1,109 @@
+package yamlpatch
+
+import (
+	"fmt"
+	"strings"
+)
+
+// PathFinder can be used to find RFC6902-standard paths given non-standard
+// (key=value) pointer syntax
+type PathFinder struct {
+	root Container
+}
+
+// NewPathFinder takes an interface that represents a YAML document and returns
+// a new PathFinder
+func NewPathFinder(container Container) *PathFinder {
+	return &PathFinder{
+		root: container,
+	}
+}
+
+// Find expands the given path into all matching paths, returning the canonical
+// versions of those matching paths
+func (p *PathFinder) Find(path string) []string {
+	parts := strings.Split(path, "/")
+
+	if parts[1] == "" {
+		return []string{"/"}
+	}
+
+	routes := map[string]Container{
+		"": p.root,
+	}
+
+	for _, part := range parts[1:] {
+		routes = find(decodePatchKey(part), routes)
+	}
+
+	var paths []string
+	for k := range routes {
+		paths = append(paths, k)
+	}
+
+	return paths
+}
+
+func find(part string, routes map[string]Container) map[string]Container {
+	matches := map[string]Container{}
+
+	for prefix, container := range routes {
+		if part == "-" {
+			for k := range routes {
+				matches[fmt.Sprintf("%s/-", k)] = routes[k]
+			}
+			return matches
+		}
+
+		if kv := strings.Split(part, "="); len(kv) == 2 {
+			if newMatches := findAll(prefix, kv[0], kv[1], container); len(newMatches) > 0 {
+				matches = newMatches
+			}
+			continue
+		}
+
+		if node, err := container.Get(part); err == nil {
+			path := fmt.Sprintf("%s/%s", prefix, part)
+			if node == nil {
+				matches[path] = container
+			} else {
+				matches[path] = node.Container()
+			}
+		}
+	}
+
+	return matches
+}
+
+func findAll(prefix, findKey, findValue string, container Container) map[string]Container {
+	if container == nil {
+		return nil
+	}
+
+	if v, err := container.Get(findKey); err == nil && v != nil {
+		if vs, ok := v.Value().(string); ok && vs == findValue {
+			return map[string]Container{
+				prefix: container,
+			}
+		}
+	}
+
+	matches := map[string]Container{}
+
+	switch it := container.(type) {
+	case *nodeMap:
+		for k, v := range *it {
+			for route, match := range findAll(fmt.Sprintf("%s/%s", prefix, k), findKey, findValue, v.Container()) {
+				matches[route] = match
+			}
+		}
+	case *nodeSlice:
+		for i, v := range *it {
+			for route, match := range findAll(fmt.Sprintf("%s/%d", prefix, i), findKey, findValue, v.Container()) {
+				matches[route] = match
+			}
+		}
+	}
+
+	return matches
+}

vendor/github.com/krishicks/yaml-patch/pathfinder_test.go

@@ -0,0 +1,74 @@
+package yamlpatch_test
+
+import (
+	yamlpatch "github.com/krishicks/yaml-patch"
+	yaml "gopkg.in/yaml.v2"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/ginkgo/extensions/table"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Pathfinder", func() {
+	var pathfinder *yamlpatch.PathFinder
+
+	BeforeEach(func() {
+		var iface interface{}
+
+		bs := []byte(`
+jobs:
+- name: job1
+  plan:
+  - get: A
+    args:
+    - arg: arg1
+    - arg: arg2
+    bool: true
+  - get: B
+  - get: C/D
+
+- name: job2
+  plan:
+  - aggregate:
+    - get: C
+    - get: A
+`)
+
+		err := yaml.Unmarshal(bs, &iface)
+		Expect(err).NotTo(HaveOccurred())
+		container := yamlpatch.NewNode(&iface).Container()
+		pathfinder = yamlpatch.NewPathFinder(container)
+	})
+
+	Describe("Find", func() {
+		DescribeTable(
+			"should",
+			func(path string, expected []string) {
+				actual := pathfinder.Find(path)
+				Expect(actual).To(HaveLen(len(expected)))
+				for _, el := range expected {
+					Expect(actual).To(ContainElement(el))
+				}
+			},
+			Entry("return a route for the root object", "/", []string{"/"}),
+			Entry("return a route for an object under the root", "/jobs", []string{"/jobs"}),
+			Entry("return a route for an element within an object under the root", "/jobs/0", []string{"/jobs/0"}),
+			Entry("return a route for an object within an element within an object under the root", "/jobs/0/plan", []string{"/jobs/0/plan"}),
+			Entry("return a route for an object within an element within an object under the root", "/jobs/0/plan/1", []string{"/jobs/0/plan/1"}),
+			Entry("return routes for multiple matches", "/jobs/get=A", []string{"/jobs/0/plan/0", "/jobs/1/plan/0/aggregate/1"}),
+			Entry("return a route for a single submatch with help", "/jobs/get=A/args/arg=arg2", []string{"/jobs/0/plan/0/args/1"}),
+			Entry("return a route for a single submatch with no help", "/jobs/get=A/arg=arg2", []string{"/jobs/0/plan/0/args/1"}),
+			Entry("return a route for a single submatch with help using escape ordering", "/jobs/get=C~1D", []string{"/jobs/0/plan/2"}),
+			Entry("return a route when given a pointer with a leaf that does not exist", "/jobs/name=job1/nonexistent", []string{"/jobs/0/nonexistent"}),
+			Entry("return a route when given a pointer with an array thingy", "/jobs/name=job1/plan/-", []string{"/jobs/0/plan/-"}),
+		)
+		DescribeTable(
+			"should not",
+			func(path string) {
+				Expect(pathfinder.Find(path)).To(BeNil())
+			},
+			Entry("return any routes when given a bad index", "/jobs/2"),
+			Entry("return any routes when given a bad index", "/jobs/-1"),
+		)
+	})
+})

vendor/github.com/krishicks/yaml-patch/placeholder_wrapper.go

@@ -0,0 +1,51 @@
+package yamlpatch
+
+import (
+	"fmt"
+	"regexp"
+)
+
+// PlaceholderWrapper can be used to wrap placeholders that make YAML invalid
+// in single quotes to make otherwise valid YAML
+type PlaceholderWrapper struct {
+	LeftSide       string
+	RightSide      string
+	unwrappedRegex *regexp.Regexp
+	wrappedRegex   *regexp.Regexp
+}
+
+// NewPlaceholderWrapper returns a new PlaceholderWrapper which knows how to
+// wrap and unwrap the provided left and right sides of a placeholder, e.g. {{
+// and }}
+func NewPlaceholderWrapper(left, right string) *PlaceholderWrapper {
+	escapedLeft := regexp.QuoteMeta(left)
+	escapedRight := regexp.QuoteMeta(right)
+	unwrappedRegex := regexp.MustCompile(`\s` + escapedLeft + `([^` + escapedRight + `]+)` + escapedRight)
+	wrappedRegex := regexp.MustCompile(`\s'` + escapedLeft + `([^` + escapedRight + `]+)` + escapedRight + `'`)
+
+	return &PlaceholderWrapper{
+		LeftSide:       left,
+		RightSide:      right,
+		unwrappedRegex: unwrappedRegex,
+		wrappedRegex:   wrappedRegex,
+	}
+}
+
+// Wrap the placeholder in single quotes to make it valid YAML
+func (w *PlaceholderWrapper) Wrap(input []byte) []byte {
+	if !w.unwrappedRegex.Match(input) {
+		return input
+	}
+
+	return w.unwrappedRegex.ReplaceAll(input, []byte(fmt.Sprintf(` '%s$1%s'`, w.LeftSide, w.RightSide)))
+}
+
+// Unwrap the single quotes from the placeholder to make it invalid YAML
+// (again)
+func (w *PlaceholderWrapper) Unwrap(input []byte) []byte {
+	if !w.wrappedRegex.Match(input) {
+		return input
+	}
+
+	return w.wrappedRegex.ReplaceAll(input, []byte(fmt.Sprintf(` %s$1%s`, w.LeftSide, w.RightSide)))
+}

vendor/github.com/krishicks/yaml-patch/placeholder_wrapper_test.go

@@ -0,0 +1,93 @@
+package yamlpatch_test
+
+import (
+	yamlpatch "github.com/krishicks/yaml-patch"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("PlaceholderWrapper", func() {
+	var placeholderWrapper *yamlpatch.PlaceholderWrapper
+
+	BeforeEach(func() {
+		placeholderWrapper = yamlpatch.NewPlaceholderWrapper("{{", "}}")
+	})
+
+	Describe("Wrap", func() {
+		It("returns the original content", func() {
+			input := []byte(`content without any placeholders`)
+			actual := placeholderWrapper.Wrap(input)
+			Expect(actual).To(Equal(input))
+		})
+
+		It("returns the content with the placeholder wrapped when the content contains a placeholder", func() {
+			input := []byte(`content with a {{placeholder}}`)
+			expected := []byte(`content with a '{{placeholder}}'`)
+			actual := placeholderWrapper.Wrap(input)
+			Expect(actual).To(Equal(expected))
+		})
+
+		It("returns the content with the placeholder wrapped when the content contains a line with only a placeholder", func() {
+			input := []byte(`
+content: |
+  {{placeholder}}
+			`)
+			expected := []byte(`
+content: |
+  '{{placeholder}}'
+			`)
+			actual := placeholderWrapper.Wrap(input)
+			Expect(actual).To(Equal(expected))
+		})
+
+		It("returns the original content when the content contains an already-wrapped placeholder", func() {
+			input := []byte(`content with a wrapped '{{placeholder}}'`)
+			actual := placeholderWrapper.Wrap(input)
+			Expect(string(actual)).To(Equal(string(input)))
+		})
+
+		It("supports alternate placeholders", func() {
+			placeholderWrapper = yamlpatch.NewPlaceholderWrapper("((", "))")
+			input := []byte(`content with an ((alternate-placeholder))`)
+			expected := []byte(`content with an '((alternate-placeholder))'`)
+			actual := placeholderWrapper.Wrap(input)
+			Expect(actual).To(Equal(expected))
+		})
+	})
+
+	Describe("Unwrap", func() {
+		It("returns the original content", func() {
+			input := []byte(`content without any placeholders`)
+			actual := placeholderWrapper.Unwrap(input)
+			Expect(string(actual)).To(Equal(string(input)))
+		})
+
+		It("returns the content with the placeholder unwrapped when the content contains a wrapped placeholder", func() {
+			input := []byte(`content with a '{{placeholder}}'`)
+			expected := []byte(`content with a {{placeholder}}`)
+			actual := placeholderWrapper.Unwrap(input)
+			Expect(string(actual)).To(Equal(string(expected)))
+		})
+
+		It("returns the content with the placeholder unwrapped when the content contains a line with only a wrapped placeholder", func() {
+			input := []byte(`
+content: |
+  '{{placeholder}}'
+			`)
+			expected := []byte(`
+content: |
+  {{placeholder}}
+			`)
+			actual := placeholderWrapper.Unwrap(input)
+			Expect(string(actual)).To(Equal(string(expected)))
+		})
+
+		It("supports alternate placeholders", func() {
+			placeholderWrapper = yamlpatch.NewPlaceholderWrapper("((", "))")
+			input := []byte(`content with an '((alternate-placeholder))'`)
+			expected := []byte(`content with an ((alternate-placeholder))`)
+			actual := placeholderWrapper.Unwrap(input)
+			Expect(actual).To(Equal(expected))
+		})
+	})
+})

vendor/github.com/krishicks/yaml-patch/yaml_patch_suite_test.go

@@ -0,0 +1,13 @@
+package yamlpatch_test
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"testing"
+)
+
+func TestYamlPatch(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "YamlPatch Suite")
+}