Modify PathConfig.PathSlice method and add tests

pkg/transformerconfig/defaultconfig/commonlabels.go

@@ -115,7 +115,7 @@ commonLabels:
   group: batch
   kind: Job
 
-- path: spec/template/metadata/Labels
+- path: spec/template/metadata/labels
   create: true
   group: batch
   kind: Job

pkg/transformerconfig/defaultconfig/defaultconfig.go

@@ -32,5 +32,5 @@ func GetDefaultPathConfigs() []byte {
 		[]byte(varReferencePathConfigs),
 		[]byte(nameReferencePathConfigs),
 	}
-	return bytes.Join(configData, []byte(`\n`))
+	return bytes.Join(configData, []byte("\n"))
 }

pkg/transformerconfig/defaultconfig/namereference.go

@@ -123,10 +123,10 @@ nameReference:
   - path: spec/volumes/secret/secretName
     version: v1
     kind: Pod
-  - path: spec/containers/env/valueFrom/secretkeyRef/name
+  - path: spec/containers/env/valueFrom/secretKeyRef/name
     version: v1
     kind: Pod
-  - path: spec/initContainers/env/valueFrom/secretkeyRef/name
+  - path: spec/initContainers/env/valueFrom/secretKeyRef/name
     version: v1
     kind: Pod
   - path: spec/containers/envFrom/secretRef/name
@@ -142,7 +142,7 @@ nameReference:
     kind: Deployment
   - path: spec/template/spec/containers/env/valueFrom/secretKeyRef/name
     kind: Deployment
-  - path: spec/template/spec/initContainers/env/valueFrom/secretkeyRef/name
+  - path: spec/template/spec/initContainers/env/valueFrom/secretKeyRef/name
     kind: Deployment
   - path: spec/template/spec/containers/envFrom/secretRef/name
     kind: Deployment

pkg/transformerconfig/defaultconfig/namespace.go

@@ -20,5 +20,6 @@ const (
 	namespacePathConfigs = `
 namespace:
 - path: metadata/namespace
+  create: true
 `
 )

pkg/transformerconfig/pathconfig.go

@@ -30,7 +30,31 @@ type PathConfig struct {
 	CreateIfNotPresent bool   `json:"create,omitempty" yaml:"create,omitempty"`
 }
 
+const (
+	escapedForwardSlash  = "\\/"
+	tempSlashReplacement = "???"
+)
+
 // PathSlice converts the path string to a slice of strings, separated by "/"
+// "/" can be contained in a fieldname.
+// such as ingress.kubernetes.io/auth-secret in Ingress annotations.
+// To deal with this special case, the path to this field should be formatted as
+//
+// metadata/annotations/ingress.kubernetes.io\/auth-secret
+//
+// Then PathSlice will return
+//
+// []string{"metadata", "annotations", "ingress.auth-secretkubernetes.io/auth-secret"}
 func (p PathConfig) PathSlice() []string {
+	if !strings.Contains(p.Path, escapedForwardSlash) {
 		return strings.Split(p.Path, "/")
+	}
+
+	s := strings.Replace(p.Path, escapedForwardSlash, tempSlashReplacement, -1)
+	paths := strings.Split(s, "/")
+	var result []string
+	for _, path := range paths {
+		result = append(result, strings.Replace(path, tempSlashReplacement, "/", -1))
+	}
+	return result
 }

pkg/transformerconfig/pathconfig_test.go

@@ -0,0 +1,46 @@
+/*
+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 transformerconfig
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestPathSlice(t *testing.T) {
+	type path struct {
+		input  string
+		parsed []string
+	}
+	paths := []path{
+		{
+			input:  "spec/metadata/annotations",
+			parsed: []string{"spec", "metadata", "annotations"},
+		},
+		{
+			input:  `metadata/annotations/nginx.ingress.kubernetes.io\/auth-secret`,
+			parsed: []string{"metadata", "annotations", "nginx.ingress.kubernetes.io/auth-secret"},
+		},
+	}
+	for _, p := range paths {
+		pathConfig := PathConfig{Path: p.input}
+		actual := pathConfig.PathSlice()
+		if !reflect.DeepEqual(actual, p.parsed) {
+			t.Fatalf("expected %v, but got %v", p.parsed, actual)
+		}
+	}
+}

pkg/transformerconfig/transformerconfig.go

@@ -21,6 +21,7 @@ package transformerconfig
 import (
 	"github.com/ghodss/yaml"
 	"sigs.k8s.io/kustomize/pkg/loader"
+	"sigs.k8s.io/kustomize/pkg/transformerconfig/defaultconfig"
 )
 
 // TransformerConfig represents the path configurations for different transformations
@@ -96,3 +97,8 @@ func MakeTransformerConfigFromBytes(data []byte) (*TransformerConfig, error) {
 func MakeEmptyTransformerConfig() *TransformerConfig {
 	return &TransformerConfig{}
 }
+
+// MakeDefaultTransformerConfig returns a TransformerConfig object from the default configurations
+func MakeDefaultTransformerConfig() (*TransformerConfig, error) {
+	return MakeTransformerConfigFromBytes(defaultconfig.GetDefaultPathConfigs())
+}

pkg/transformerconfig/transformerconfig_test.go

@@ -1,3 +1,19 @@
+/*
+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 transformerconfig
 
 import (
@@ -125,3 +141,10 @@ func TestMerge(t *testing.T) {
 		t.Fatalf("expected: %v\n but got: %v\n", expected, actual)
 	}
 }
+
+func TestMakeDefaultTransformerConfig(t *testing.T) {
+	_, err := MakeDefaultTransformerConfig()
+	if err != nil {
+		t.Fatalf("unexpected error %v\n", err)
+	}
+}