Patchtransformers - drop copied code, improve deletion handling.

api/builtins/PatchStrategicMergeTransformer.go

@@ -5,14 +5,10 @@ package builtins
 
 import (
 	"fmt"
-	"strings"
 
-	"github.com/pkg/errors"
-	"sigs.k8s.io/kustomize/api/filters/patchstrategicmerge"
 	"sigs.k8s.io/kustomize/api/resmap"
 	"sigs.k8s.io/kustomize/api/resource"
 	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/filtersutil"
 	"sigs.k8s.io/yaml"
 )
 
@@ -73,44 +69,10 @@ func (p *PatchStrategicMergeTransformerPlugin) Transform(m resmap.ResMap) error
 		if err != nil {
 			return err
 		}
-		patchCopy := patch.DeepCopy()
+		if err = m.ApplySmPatch(
-		patchCopy.SetName(target.GetName())
+			resource.MakeIdSet([]*resource.Resource{target}), patch); err != nil {
-		patchCopy.SetNamespace(target.GetNamespace())
-		patchCopy.SetGvk(target.GetGvk())
-		node, err := filtersutil.GetRNode(patchCopy)
-		if err != nil {
 			return err
 		}
-		err = filtersutil.ApplyToJSON(patchstrategicmerge.Filter{
-			Patch: node,
-		}, target)
-		if err != nil {
-			// Check for an error string from UnmarshalJSON that's indicative
-			// of an object that's missing basic KRM fields, and thus may have been
-			// entirely deleted (an acceptable outcome).  This error handling should
-			// be deleted along with use of ResMap and apimachinery functions like
-			// UnmarshalJSON.
-			if !strings.Contains(err.Error(), "Object 'Kind' is missing") {
-				// Some unknown error, let it through.
-				return err
-			}
-			if !target.IsEmpty() {
-				return errors.Wrapf(
-					err, "with unexpectedly non-empty object map of size %d",
-					len(target.Map()))
-			}
-			// Fall through to handle deleted object.
-		}
-		if target.IsEmpty() {
-			// This means all fields have been removed from the object.
-			// This can happen if a patch required deletion of the
-			// entire resource (not just a part of it).  This means
-			// the overall resmap must shrink by one.
-			err = m.Remove(target.CurId())
-			if err != nil {
-				return err
-			}
-		}
 	}
 	return nil
 }

api/builtins/PatchTransformer.go

@@ -8,9 +8,7 @@ import (
 	"strings"
 
 	jsonpatch "github.com/evanphx/json-patch"
-	"github.com/pkg/errors"
 	"sigs.k8s.io/kustomize/api/filters/patchjson6902"
-	"sigs.k8s.io/kustomize/api/filters/patchstrategicmerge"
 	"sigs.k8s.io/kustomize/api/resmap"
 	"sigs.k8s.io/kustomize/api/resource"
 	"sigs.k8s.io/kustomize/api/types"
@@ -41,7 +39,6 @@ func (p *PatchTransformerPlugin) Config(
 		return fmt.Errorf(
 			"patch and path can't be set at the same time\n%s", string(c))
 	}
-
 	if p.Path != "" {
 		loaded, loadErr := h.Loader().Load(p.Path)
 		if loadErr != nil {
@@ -88,66 +85,13 @@ func (p *PatchTransformerPlugin) transformStrategicMerge(m resmap.ResMap, patch
 		if err != nil {
 			return err
 		}
-		return p.applySMPatch(target, patch)
+		return target.ApplySmPatch(patch)
 	}
-
+	selected, err := m.Select(*p.Target)
-	resources, err := m.Select(*p.Target)
 	if err != nil {
 		return err
 	}
-	for _, res := range resources {
+	return m.ApplySmPatch(resource.MakeIdSet(selected), patch)
-		patchCopy := patch.DeepCopy()
-		patchCopy.SetName(res.GetName())
-		patchCopy.SetNamespace(res.GetNamespace())
-		patchCopy.SetGvk(res.GetGvk())
-		err := p.applySMPatch(res, patchCopy)
-		if err != nil {
-			// Check for an error string from UnmarshalJSON that's indicative
-			// of an object that's missing basic KRM fields, and thus may have been
-			// entirely deleted (an acceptable outcome).  This error handling should
-			// be deleted along with use of ResMap and apimachinery functions like
-			// UnmarshalJSON.
-			if !strings.Contains(err.Error(), "Object 'Kind' is missing") {
-				// Some unknown error, let it through.
-				return err
-			}
-			if !res.IsEmpty() {
-				return errors.Wrapf(
-					err, "with unexpectedly non-empty object map of size %d",
-					len(res.Map()))
-			}
-			// Fall through to handle deleted object.
-		}
-		if res.IsEmpty() {
-			// This means all fields have been removed from the object.
-			// This can happen if a patch required deletion of the
-			// entire resource (not just a part of it).  This means
-			// the overall resmap must shrink by one.
-			err = m.Remove(res.CurId())
-			if err != nil {
-				return err
-			}
-		}
-	}
-	return nil
-}
-
-// applySMPatch applies the provided strategic merge patch to the
-// given resource.
-func (p *PatchTransformerPlugin) applySMPatch(resource, patch *resource.Resource) error {
-	node, err := filtersutil.GetRNode(patch)
-	if err != nil {
-		return err
-	}
-	n, ns := resource.GetName(), resource.GetNamespace()
-	err = filtersutil.ApplyToJSON(patchstrategicmerge.Filter{
-		Patch: node,
-	}, resource)
-	if !resource.IsEmpty() {
-		resource.SetName(n)
-		resource.SetNamespace(ns)
-	}
-	return err
 }
 
 // transformJson6902 applies the provided json6902 patch

api/internal/target/kusttarget_configplugin.go

@@ -183,8 +183,7 @@ var transformerConfigurators = map[builtinhelpers.BuiltinPluginType]func(
 			return
 		}
 		var c struct {
-			Paths   []types.PatchStrategicMerge `json:"paths,omitempty" yaml:"paths,omitempty"`
+			Paths []types.PatchStrategicMerge `json:"paths,omitempty" yaml:"paths,omitempty"`
-			Patches string                      `json:"patches,omitempty" yaml:"patches,omitempty"`
 		}
 		c.Paths = kt.kustomization.PatchesStrategicMerge
 		p := f()

api/resmap/resmap.go

@@ -240,4 +240,9 @@ type ResMap interface {
 	// ToRNodeSlice converts the resources in the resmp
 	// to a list of RNodes
 	ToRNodeSlice() ([]*yaml.RNode, error)
+
+	// ApplySmPatch applies a strategic-merge patch to the
+	// selected set of resources.
+	ApplySmPatch(
+		selectedSet *resource.IdSet, patch *resource.Resource) error
 }

api/resmap/reswrangler.go

@@ -6,6 +6,7 @@ package resmap
 import (
 	"bytes"
 	"fmt"
+	"strings"
 
 	"github.com/pkg/errors"
 	"sigs.k8s.io/kustomize/api/resid"
@@ -578,3 +579,46 @@ func (m *resWrangler) ToRNodeSlice() ([]*kyaml_yaml.RNode, error) {
 	}
 	return rnodes, nil
 }
+
+func (m *resWrangler) ApplySmPatch(
+	selectedSet *resource.IdSet, patch *resource.Resource) error {
+	newRm := New()
+	for _, res := range m.Resources() {
+		if !selectedSet.Contains(res.CurId()) {
+			newRm.Append(res)
+			continue
+		}
+		patchCopy := patch.DeepCopy()
+		patchCopy.SetName(res.GetName())
+		patchCopy.SetNamespace(res.GetNamespace())
+		patchCopy.SetGvk(res.GetGvk())
+		err := res.ApplySmPatch(patchCopy)
+		if err != nil {
+			// Check for an error string from UnmarshalJSON that's indicative
+			// of an object that's missing basic KRM fields, and thus may have been
+			// entirely deleted (an acceptable outcome).  This error handling should
+			// be deleted along with use of ResMap and apimachinery functions like
+			// UnmarshalJSON.
+			if !strings.Contains(err.Error(), "Object 'Kind' is missing") {
+				// Some unknown error, let it through.
+				return err
+			}
+			if !res.IsEmpty() {
+				return errors.Wrapf(
+					err, "with unexpectedly non-empty object map of size %d",
+					len(res.Map()))
+			}
+			// Fall through to handle deleted object.
+		}
+		if !res.IsEmpty() {
+			// IsEmpty means all fields have been removed from the object.
+			// This can happen if a patch required deletion of the
+			// entire resource (not just a part of it).  This means
+			// the overall resmap must shrink by one.
+			newRm.Append(res)
+		}
+	}
+	m.Clear()
+	m.AppendAll(newRm)
+	return nil
+}

api/resource/resource.go

@@ -9,9 +9,11 @@ import (
 	"reflect"
 	"strings"
 
+	"sigs.k8s.io/kustomize/api/filters/patchstrategicmerge"
 	"sigs.k8s.io/kustomize/api/ifc"
 	"sigs.k8s.io/kustomize/api/resid"
 	"sigs.k8s.io/kustomize/api/types"
+	"sigs.k8s.io/kustomize/kyaml/filtersutil"
 	"sigs.k8s.io/yaml"
 )
 
@@ -396,6 +398,23 @@ func (r *Resource) AppendRefVarName(variable types.Var) {
 	r.refVarNames = append(r.refVarNames, variable.Name)
 }
 
+// ApplySmPatch applies the provided strategic merge patch.
+func (r *Resource) ApplySmPatch(patch *Resource) error {
+	node, err := filtersutil.GetRNode(patch)
+	if err != nil {
+		return err
+	}
+	n, ns := r.GetName(), r.GetNamespace()
+	err = filtersutil.ApplyToJSON(patchstrategicmerge.Filter{
+		Patch: node,
+	}, r)
+	if !r.IsEmpty() {
+		r.SetName(n)
+		r.SetNamespace(ns)
+	}
+	return err
+}
+
 // TODO: Add BinaryData once we sync to new k8s.io/api
 func mergeConfigmap(
 	mergedTo map[string]interface{},

api/resource/resource_test.go

@@ -4,9 +4,11 @@
 package resource_test
 
 import (
+	"fmt"
 	"reflect"
 	"testing"
 
+	"github.com/stretchr/testify/assert"
 	"sigs.k8s.io/kustomize/api/provider"
 	"sigs.k8s.io/kustomize/api/resid"
 	. "sigs.k8s.io/kustomize/api/resource"
@@ -123,3 +125,575 @@ func TestDeepCopy(t *testing.T) {
 		t.Errorf("expected %v\nbut got%v", r, cr)
 	}
 }
+
+func TestApplySmPatch_1(t *testing.T) {
+	resource, err := factory.FromBytes([]byte(`
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  annotations:
+    baseAnno: This is a base annotation
+  labels:
+    app: mungebot
+    foo: bar
+  name: bingo
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      foo: bar
+  template:
+    metadata:
+      labels:
+        app: mungebot
+    spec:
+      containers:
+      - env:
+        - name: foo
+          value: bar
+        image: nginx
+        name: nginx
+        ports:
+        - containerPort: 80
+`))
+	assert.NoError(t, err)
+	patch, err := factory.FromBytes([]byte(`
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: baseprefix-mungebot
+spec:
+  template:
+    spec:
+      containers:
+      - image: nginx
+        name: nginx
+        ports:
+        - containerPort: 777
+`))
+	assert.NoError(t, err)
+
+	assert.NoError(t, resource.ApplySmPatch(patch))
+	bytes, err := resource.AsYAML()
+	assert.NoError(t, err)
+	assert.Equal(t, `apiVersion: apps/v1
+kind: Deployment
+metadata:
+  annotations:
+    baseAnno: This is a base annotation
+  labels:
+    app: mungebot
+    foo: bar
+  name: bingo
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      foo: bar
+  template:
+    metadata:
+      labels:
+        app: mungebot
+    spec:
+      containers:
+      - env:
+        - name: foo
+          value: bar
+        image: nginx
+        name: nginx
+        ports:
+        - containerPort: 777
+        - containerPort: 80
+`, string(bytes))
+}
+
+func TestApplySmPatch(t *testing.T) {
+	const (
+		myDeployment = "Deployment"
+		myCRD        = "myCRD"
+	)
+
+	tests := map[string]struct {
+		base          string
+		patch         []string
+		expected      string
+		errorExpected bool
+		errorMsg      string
+	}{
+		"withschema-label-image-container": {
+			base: baseResource(myDeployment),
+			patch: []string{
+				addLabelAndEnvPatch(myDeployment),
+				changeImagePatch(myDeployment, "nginx:latest"),
+				addContainerAndEnvPatch(myDeployment),
+			},
+			errorExpected: false,
+			expected:      expectedResultMultiPatch(myDeployment, false),
+		},
+		"withschema-image-container-label": {
+			base: baseResource(myDeployment),
+			patch: []string{
+				changeImagePatch(myDeployment, "nginx:latest"),
+				addContainerAndEnvPatch(myDeployment),
+				addLabelAndEnvPatch(myDeployment),
+			},
+			errorExpected: false,
+			expected:      expectedResultMultiPatch(myDeployment, true),
+		},
+		"withschema-container-label-image": {
+			base: baseResource(myDeployment),
+			patch: []string{
+				addContainerAndEnvPatch(myDeployment),
+				addLabelAndEnvPatch(myDeployment),
+				changeImagePatch(myDeployment, "nginx:latest"),
+			},
+			errorExpected: false,
+			expected:      expectedResultMultiPatch(myDeployment, true),
+		},
+		"noschema-label-image-container": {
+			base: baseResource(myCRD),
+			patch: []string{
+				addLabelAndEnvPatch(myCRD),
+				changeImagePatch(myCRD, "nginx:latest"),
+				addContainerAndEnvPatch(myCRD),
+			},
+			// Might be better if this complained about patch conflict.
+			// See plugin/builtin/patchstrategicmergetransformer/psmt_test.go
+			expected: `apiVersion: apps/v1
+kind: myCRD
+metadata:
+  name: deploy1
+spec:
+  template:
+    metadata:
+      labels:
+        old-label: old-value
+        some-label: some-value
+    spec:
+      containers:
+      - env:
+        - name: ANOTHERENV
+          value: ANOTHERVALUE
+        name: nginx
+      - image: anotherimage
+        name: anothercontainer
+`,
+		},
+		"noschema-image-container-label": {
+			base: baseResource(myCRD),
+			patch: []string{
+				changeImagePatch(myCRD, "nginx:latest"),
+				addContainerAndEnvPatch(myCRD),
+				addLabelAndEnvPatch(myCRD),
+			},
+			// Might be better if this complained about patch conflict.
+			expected: `apiVersion: apps/v1
+kind: myCRD
+metadata:
+  name: deploy1
+spec:
+  template:
+    metadata:
+      labels:
+        old-label: old-value
+        some-label: some-value
+    spec:
+      containers:
+      - env:
+        - name: SOMEENV
+          value: SOMEVALUE
+        name: nginx
+`,
+		},
+		"noschema-container-label-image": {
+			base: baseResource(myCRD),
+			patch: []string{
+				addContainerAndEnvPatch(myCRD),
+				addLabelAndEnvPatch(myCRD),
+				changeImagePatch(myCRD, "nginx:latest"),
+			},
+			// Might be better if this complained about patch conflict.
+			expected: `apiVersion: apps/v1
+kind: myCRD
+metadata:
+  name: deploy1
+spec:
+  template:
+    metadata:
+      labels:
+        old-label: old-value
+        some-label: some-value
+    spec:
+      containers:
+      - image: nginx:latest
+        name: nginx
+`,
+		},
+
+		"withschema-label-latest-someV-01": {
+			base: baseResource(myDeployment),
+			patch: []string{
+				addLabelAndEnvPatch(myDeployment),
+				changeImagePatch(myDeployment, "nginx:latest"),
+				changeImagePatch(myDeployment, "nginx:1.7.9"),
+			},
+			expected: `apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  template:
+    metadata:
+      labels:
+        old-label: old-value
+        some-label: some-value
+    spec:
+      containers:
+      - env:
+        - name: SOMEENV
+          value: SOMEVALUE
+        image: nginx:1.7.9
+        name: nginx
+`,
+		},
+		"withschema-latest-label-someV-02": {
+			base: baseResource(myDeployment),
+			patch: []string{
+				changeImagePatch(myDeployment, "nginx:latest"),
+				addLabelAndEnvPatch(myDeployment),
+				changeImagePatch(myDeployment, "nginx:1.7.9"),
+			},
+			expected: `apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  template:
+    metadata:
+      labels:
+        old-label: old-value
+        some-label: some-value
+    spec:
+      containers:
+      - env:
+        - name: SOMEENV
+          value: SOMEVALUE
+        image: nginx:1.7.9
+        name: nginx
+`,
+		},
+		"withschema-latest-label-someV-03": {
+			base: baseResource(myDeployment),
+			patch: []string{
+				changeImagePatch(myDeployment, "nginx:1.7.9"),
+				addLabelAndEnvPatch(myDeployment),
+				changeImagePatch(myDeployment, "nginx:latest"),
+			},
+			expected: `apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  template:
+    metadata:
+      labels:
+        old-label: old-value
+        some-label: some-value
+    spec:
+      containers:
+      - env:
+        - name: SOMEENV
+          value: SOMEVALUE
+        image: nginx:latest
+        name: nginx
+`,
+		},
+		"withschema-latest-label-someV-04": {
+			base: baseResource(myDeployment),
+			patch: []string{
+				changeImagePatch(myDeployment, "nginx:1.7.9"),
+				changeImagePatch(myDeployment, "nginx:latest"),
+				addLabelAndEnvPatch(myDeployment),
+				changeImagePatch(myDeployment, "nginx:nginx"),
+			},
+			expected: `apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  template:
+    metadata:
+      labels:
+        old-label: old-value
+        some-label: some-value
+    spec:
+      containers:
+      - env:
+        - name: SOMEENV
+          value: SOMEVALUE
+        image: nginx:nginx
+        name: nginx
+`,
+		},
+		"noschema-latest-label-someV-01": {
+			base: baseResource(myCRD),
+			patch: []string{
+				addLabelAndEnvPatch(myCRD),
+				changeImagePatch(myCRD, "nginx:latest"),
+				changeImagePatch(myCRD, "nginx:1.7.9"),
+			},
+			expected: `apiVersion: apps/v1
+kind: myCRD
+metadata:
+  name: deploy1
+spec:
+  template:
+    metadata:
+      labels:
+        old-label: old-value
+        some-label: some-value
+    spec:
+      containers:
+      - image: nginx:1.7.9
+        name: nginx
+`,
+		},
+		"noschema-latest-label-someV-02": {
+			base: baseResource(myCRD),
+			patch: []string{
+				changeImagePatch(myCRD, "nginx:latest"),
+				addLabelAndEnvPatch(myCRD),
+				changeImagePatch(myCRD, "nginx:1.7.9"),
+			},
+			expected: expectedResultJMP("nginx:1.7.9"),
+		},
+		"noschema-latest-label-someV-03": {
+			base: baseResource(myCRD),
+			patch: []string{
+				changeImagePatch(myCRD, "nginx:1.7.9"),
+				addLabelAndEnvPatch(myCRD),
+				changeImagePatch(myCRD, "nginx:latest"),
+			},
+			expected: `apiVersion: apps/v1
+kind: myCRD
+metadata:
+  name: deploy1
+spec:
+  template:
+    metadata:
+      labels:
+        old-label: old-value
+        some-label: some-value
+    spec:
+      containers:
+      - image: nginx:latest
+        name: nginx
+`,
+		},
+		"noschema-latest-label-someV-04": {
+			base: baseResource(myCRD),
+			patch: []string{
+				changeImagePatch(myCRD, "nginx:1.7.9"),
+				changeImagePatch(myCRD, "nginx:latest"),
+				addLabelAndEnvPatch(myCRD),
+				changeImagePatch(myCRD, "nginx:nginx"),
+			},
+			expected: `apiVersion: apps/v1
+kind: myCRD
+metadata:
+  name: deploy1
+spec:
+  template:
+    metadata:
+      labels:
+        old-label: old-value
+        some-label: some-value
+    spec:
+      containers:
+      - image: nginx:nginx
+        name: nginx
+`,
+		},
+	}
+
+	for name, test := range tests {
+		resource, err := factory.FromBytes([]byte(test.base))
+		assert.NoError(t, err)
+		for _, p := range test.patch {
+			patch, err := factory.FromBytes([]byte(p))
+			assert.NoError(t, err, name)
+			assert.NoError(t, resource.ApplySmPatch(patch), name)
+		}
+		bytes, err := resource.AsYAML()
+		if test.errorExpected {
+			assert.Error(t, err, name)
+		} else {
+			assert.NoError(t, err, name)
+			assert.Equal(t, test.expected, string(bytes), name)
+		}
+	}
+}
+
+// baseResource produces a base object which used to test
+// patch transformation
+// Also the structure is matching the Deployment syntax
+// the kind can be replaced to allow testing using CRD
+// without access to the schema
+func baseResource(kind string) string {
+	res := `
+apiVersion: apps/v1
+kind: %s
+metadata:
+  name: deploy1
+spec:
+  template:
+    metadata:
+      labels:
+        old-label: old-value
+    spec:
+      containers:
+      - name: nginx
+        image: nginx`
+	return fmt.Sprintf(res, kind)
+}
+
+// addContainerAndEnvPatch produces a patch object which adds
+// an entry in the env slice of the first/nginx container
+// as well as adding a label in the metadata
+// Note that for SMP/WithSchema merge, the name:nginx entry
+// is mandatory
+func addLabelAndEnvPatch(kind string) string {
+	return fmt.Sprintf(`
+apiVersion: apps/v1
+kind: %s
+metadata:
+  name: deploy1
+spec:
+  template:
+    metadata:
+      labels:
+        some-label: some-value
+    spec:
+      containers:
+       - name: nginx
+         env:
+         - name: SOMEENV
+           value: SOMEVALUE`, kind)
+}
+
+// addContainerAndEnvPatch produces a patch object which adds
+// an entry in the env slice of the first/nginx container
+// as well as adding a second container in the container list
+// Note that for SMP/WithSchema merge, the name:nginx entry
+// is mandatory
+func addContainerAndEnvPatch(kind string) string {
+	return fmt.Sprintf(`
+apiVersion: apps/v1
+kind: %s
+metadata:
+  name: deploy1
+spec:
+  template:
+    spec:
+      containers:
+      - name: nginx
+        env:
+        - name: ANOTHERENV
+          value: ANOTHERVALUE
+      - name: anothercontainer
+        image: anotherimage`, kind)
+}
+
+// addContainerAndEnvPatch produces a patch object which replaces
+// the value of the image field in the first/nginx container
+// Note that for SMP/WithSchema merge, the name:nginx entry
+// is mandatory
+func changeImagePatch(kind string, newImage string) string {
+	return fmt.Sprintf(`
+apiVersion: apps/v1
+kind: %s
+metadata:
+  name: deploy1
+spec:
+  template:
+    spec:
+      containers:
+      - name: nginx
+        image: %s`, kind, newImage)
+}
+
+// utility method to build the expected result of a multipatch
+// the order of the patches still have influence especially
+// in the insertion location within arrays.
+func expectedResultMultiPatch(kind string, reversed bool) string {
+	pattern := `apiVersion: apps/v1
+kind: %s
+metadata:
+  name: deploy1
+spec:
+  template:
+    metadata:
+      labels:
+        old-label: old-value
+        some-label: some-value
+    spec:
+      containers:
+      - env:
+        %s
+        image: nginx:latest
+        name: nginx
+      - image: anotherimage
+        name: anothercontainer
+`
+	if reversed {
+		return fmt.Sprintf(pattern, kind, `- name: SOMEENV
+          value: SOMEVALUE
+        - name: ANOTHERENV
+          value: ANOTHERVALUE`)
+	}
+	return fmt.Sprintf(pattern, kind, `- name: ANOTHERENV
+          value: ANOTHERVALUE
+        - name: SOMEENV
+          value: SOMEVALUE`)
+}
+
+// utility method building the expected output of a JMP.
+// imagename parameter allows to build a result consistent
+// with the JMP behavior which basically overrides the
+// entire "containers" list.
+func expectedResultJMP(imagename string) string {
+	if imagename == "" {
+		return `apiVersion: apps/v1
+kind: myCRD
+metadata:
+  name: deploy1
+spec:
+  template:
+    metadata:
+      labels:
+        old-label: old-value
+        some-label: some-value
+    spec:
+      containers:
+      - env:
+        - name: SOMEENV
+          value: SOMEVALUE
+        name: nginx
+`
+	}
+	return fmt.Sprintf(`apiVersion: apps/v1
+kind: myCRD
+metadata:
+  name: deploy1
+spec:
+  template:
+    metadata:
+      labels:
+        old-label: old-value
+        some-label: some-value
+    spec:
+      containers:
+      - image: %s
+        name: nginx
+`, imagename)
+}

plugin/builtin/patchstrategicmergetransformer/PatchStrategicMergeTransformer.go

@@ -6,14 +6,9 @@ package main
 
 import (
 	"fmt"
-	"strings"
-
-	"github.com/pkg/errors"
-	"sigs.k8s.io/kustomize/api/filters/patchstrategicmerge"
 	"sigs.k8s.io/kustomize/api/resmap"
 	"sigs.k8s.io/kustomize/api/resource"
 	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/filtersutil"
 	"sigs.k8s.io/yaml"
 )
 
@@ -77,44 +72,10 @@ func (p *plugin) Transform(m resmap.ResMap) error {
 		if err != nil {
 			return err
 		}
-		patchCopy := patch.DeepCopy()
+		if err = m.ApplySmPatch(
-		patchCopy.SetName(target.GetName())
+			resource.MakeIdSet([]*resource.Resource{target}), patch); err != nil {
-		patchCopy.SetNamespace(target.GetNamespace())
-		patchCopy.SetGvk(target.GetGvk())
-		node, err := filtersutil.GetRNode(patchCopy)
-		if err != nil {
 			return err
 		}
-		err = filtersutil.ApplyToJSON(patchstrategicmerge.Filter{
-			Patch: node,
-		}, target)
-		if err != nil {
-			// Check for an error string from UnmarshalJSON that's indicative
-			// of an object that's missing basic KRM fields, and thus may have been
-			// entirely deleted (an acceptable outcome).  This error handling should
-			// be deleted along with use of ResMap and apimachinery functions like
-			// UnmarshalJSON.
-			if !strings.Contains(err.Error(), "Object 'Kind' is missing") {
-				// Some unknown error, let it through.
-				return err
-			}
-			if !target.IsEmpty() {
-				return errors.Wrapf(
-					err, "with unexpectedly non-empty object map of size %d",
-					len(target.Map()))
-			}
-			// Fall through to handle deleted object.
-		}
-		if target.IsEmpty() {
-			// This means all fields have been removed from the object.
-			// This can happen if a patch required deletion of the
-			// entire resource (not just a part of it).  This means
-			// the overall resmap must shrink by one.
-			err = m.Remove(target.CurId())
-			if err != nil {
-				return err
-			}
-		}
 	}
 	return nil
 }

plugin/builtin/patchstrategicmergetransformer/PatchStrategicMergeTransformer_test.go

@@ -1107,7 +1107,7 @@ func TestMultiplePatchesWithConflict(t *testing.T) {
 			errorMsg:      "conflict",
 		},
 		{
-			name: "withschema-latest-label-1.7.9",
+			name: "withschema-latest-label-1.7.9-difforder",
 			base: baseResource(Deployment),
 			patch: []string{
 				changeImagePatch(Deployment, "nginx:latest"),

plugin/builtin/patchstrategicmergetransformer/go.mod

@@ -3,9 +3,7 @@ module sigs.k8s.io/kustomize/plugin/builtin/patchstrategicmergetransformer
 go 1.15
 
 require (
-	github.com/pkg/errors v0.8.1
 	sigs.k8s.io/kustomize/api v0.6.5
-	sigs.k8s.io/kustomize/kyaml v0.9.4
 	sigs.k8s.io/yaml v1.2.0
 )
 

plugin/builtin/patchtransformer/PatchTransformer.go

@@ -9,9 +9,7 @@ import (
 	"strings"
 
 	jsonpatch "github.com/evanphx/json-patch"
-	"github.com/pkg/errors"
 	"sigs.k8s.io/kustomize/api/filters/patchjson6902"
-	"sigs.k8s.io/kustomize/api/filters/patchstrategicmerge"
 	"sigs.k8s.io/kustomize/api/resmap"
 	"sigs.k8s.io/kustomize/api/resource"
 	"sigs.k8s.io/kustomize/api/types"
@@ -45,7 +43,6 @@ func (p *plugin) Config(
 		return fmt.Errorf(
 			"patch and path can't be set at the same time\n%s", string(c))
 	}
-
 	if p.Path != "" {
 		loaded, loadErr := h.Loader().Load(p.Path)
 		if loadErr != nil {
@@ -92,66 +89,13 @@ func (p *plugin) transformStrategicMerge(m resmap.ResMap, patch *resource.Resour
 		if err != nil {
 			return err
 		}
-		return p.applySMPatch(target, patch)
+		return target.ApplySmPatch(patch)
 	}
-
+	selected, err := m.Select(*p.Target)
-	resources, err := m.Select(*p.Target)
 	if err != nil {
 		return err
 	}
-	for _, res := range resources {
+	return m.ApplySmPatch(resource.MakeIdSet(selected), patch)
-		patchCopy := patch.DeepCopy()
-		patchCopy.SetName(res.GetName())
-		patchCopy.SetNamespace(res.GetNamespace())
-		patchCopy.SetGvk(res.GetGvk())
-		err := p.applySMPatch(res, patchCopy)
-		if err != nil {
-			// Check for an error string from UnmarshalJSON that's indicative
-			// of an object that's missing basic KRM fields, and thus may have been
-			// entirely deleted (an acceptable outcome).  This error handling should
-			// be deleted along with use of ResMap and apimachinery functions like
-			// UnmarshalJSON.
-			if !strings.Contains(err.Error(), "Object 'Kind' is missing") {
-				// Some unknown error, let it through.
-				return err
-			}
-			if !res.IsEmpty() {
-				return errors.Wrapf(
-					err, "with unexpectedly non-empty object map of size %d",
-					len(res.Map()))
-			}
-			// Fall through to handle deleted object.
-		}
-		if res.IsEmpty() {
-			// This means all fields have been removed from the object.
-			// This can happen if a patch required deletion of the
-			// entire resource (not just a part of it).  This means
-			// the overall resmap must shrink by one.
-			err = m.Remove(res.CurId())
-			if err != nil {
-				return err
-			}
-		}
-	}
-	return nil
-}
-
-// applySMPatch applies the provided strategic merge patch to the
-// given resource.
-func (p *plugin) applySMPatch(resource, patch *resource.Resource) error {
-	node, err := filtersutil.GetRNode(patch)
-	if err != nil {
-		return err
-	}
-	n, ns := resource.GetName(), resource.GetNamespace()
-	err = filtersutil.ApplyToJSON(patchstrategicmerge.Filter{
-		Patch: node,
-	}, resource)
-	if !resource.IsEmpty() {
-		resource.SetName(n)
-		resource.SetNamespace(ns)
-	}
-	return err
 }
 
 // transformJson6902 applies the provided json6902 patch

plugin/builtin/patchtransformer/go.mod

@@ -4,7 +4,6 @@ go 1.15
 
 require (
 	github.com/evanphx/json-patch v4.5.0+incompatible
-	github.com/pkg/errors v0.8.1
 	sigs.k8s.io/kustomize/api v0.6.5
 	sigs.k8s.io/kustomize/kyaml v0.9.4
 	sigs.k8s.io/yaml v1.2.0