Add validator interface

pkg/commands/addmetadata.go

@@ -24,7 +24,6 @@ import (
 	"sigs.k8s.io/kustomize/pkg/constants"
 	"sigs.k8s.io/kustomize/pkg/fs"
 	"sigs.k8s.io/kustomize/pkg/types"
-	"sigs.k8s.io/kustomize/pkg/validators"
 )
 
 // kindOfAdd is the kind of metadata being added: label or annotation
@@ -48,12 +47,12 @@ func (k kindOfAdd) String() string {
 
 type addMetadataOptions struct {
 	metadata     map[string]string
-	mapValidator validators.MapValidatorFunc
+	mapValidator func(map[string]string) error
 	kind         kindOfAdd
 }
 
 // newCmdAddAnnotation adds one or more commonAnnotations to the kustomization file.
-func newCmdAddAnnotation(fSys fs.FileSystem, v validators.MapValidatorFunc) *cobra.Command {
+func newCmdAddAnnotation(fSys fs.FileSystem, v func(map[string]string) error) *cobra.Command {
 	var o addMetadataOptions
 	o.kind = annotation
 	o.mapValidator = v
@@ -70,7 +69,7 @@ func newCmdAddAnnotation(fSys fs.FileSystem, v validators.MapValidatorFunc) *cob
 }
 
 // newCmdAddLabel adds one or more commonLabels to the kustomization file.
-func newCmdAddLabel(fSys fs.FileSystem, v validators.MapValidatorFunc) *cobra.Command {
+func newCmdAddLabel(fSys fs.FileSystem, v func(map[string]string) error) *cobra.Command {
 	var o addMetadataOptions
 	o.kind = label
 	o.mapValidator = v

pkg/commands/commands.go

@@ -24,7 +24,7 @@ import (
 
 	"github.com/spf13/cobra"
 	"sigs.k8s.io/kustomize/pkg/fs"
-	"sigs.k8s.io/kustomize/pkg/validators"
+	"sigs.k8s.io/kustomize/pkg/ifc"
 )
 
 // NewDefaultCommand returns the default (aka root) command for kustomize command.
@@ -45,7 +45,7 @@ See https://sigs.k8s.io/kustomize
 	c.AddCommand(
 		// TODO: Make consistent API for newCmd* functions.
 		newCmdBuild(stdOut, fsys, k8sdeps.NewKustDecoder()),
-		newCmdEdit(fsys),
+		newCmdEdit(fsys, k8sdeps.NewKustValidator()),
 		newCmdConfig(fsys),
 		newCmdVersion(stdOut),
 	)
@@ -58,7 +58,7 @@ See https://sigs.k8s.io/kustomize
 }
 
 // newCmdEdit returns an instance of 'edit' subcommand.
-func newCmdEdit(fsys fs.FileSystem) *cobra.Command {
+func newCmdEdit(fsys fs.FileSystem, v ifc.Validator) *cobra.Command {
 	c := &cobra.Command{
 		Use:   "edit",
 		Short: "Edits a kustomization file",
@@ -73,14 +73,14 @@ func newCmdEdit(fsys fs.FileSystem) *cobra.Command {
 		Args: cobra.MinimumNArgs(1),
 	}
 	c.AddCommand(
-		newCmdAdd(fsys),
-		newCmdSet(fsys),
+		newCmdAdd(fsys, v),
+		newCmdSet(fsys, v),
 	)
 	return c
 }
 
 // newAddCommand returns an instance of 'add' subcommand.
-func newCmdAdd(fsys fs.FileSystem) *cobra.Command {
+func newCmdAdd(fsys fs.FileSystem, v ifc.Validator) *cobra.Command {
 	c := &cobra.Command{
 		Use:   "add",
 		Short: "Adds configmap/resource/patch/base to the kustomization file.",
@@ -112,14 +112,14 @@ func newCmdAdd(fsys fs.FileSystem) *cobra.Command {
 		newCmdAddPatch(fsys),
 		newCmdAddConfigMap(fsys),
 		newCmdAddBase(fsys),
-		newCmdAddLabel(fsys, validators.MakeLabelValidator()),
-		newCmdAddAnnotation(fsys, validators.MakeAnnotationValidator()),
+		newCmdAddLabel(fsys, v.MakeLabelValidator()),
+		newCmdAddAnnotation(fsys, v.MakeAnnotationValidator()),
 	)
 	return c
 }
 
 // newSetCommand returns an instance of 'set' subcommand.
-func newCmdSet(fsys fs.FileSystem) *cobra.Command {
+func newCmdSet(fsys fs.FileSystem, v ifc.Validator) *cobra.Command {
 	c := &cobra.Command{
 		Use:   "set",
 		Short: "Sets the value of different fields in kustomization file.",
@@ -133,7 +133,7 @@ func newCmdSet(fsys fs.FileSystem) *cobra.Command {
 
 	c.AddCommand(
 		newCmdSetNamePrefix(fsys),
-		newCmdSetNamespace(fsys),
+		newCmdSetNamespace(fsys, v),
 		newCmdSetImageTag(fsys),
 	)
 	return c

pkg/commands/setnamespace.go

@@ -22,17 +22,18 @@ import (
 	"strings"
 
 	"github.com/spf13/cobra"
-	"k8s.io/apimachinery/pkg/util/validation"
 	"sigs.k8s.io/kustomize/pkg/constants"
 	"sigs.k8s.io/kustomize/pkg/fs"
+	"sigs.k8s.io/kustomize/pkg/ifc"
 )
 
 type setNamespaceOptions struct {
 	namespace string
+	validator ifc.Validator
 }
 
 // newCmdSetNamespace sets the value of the namespace field in the kustomization.
-func newCmdSetNamespace(fsys fs.FileSystem) *cobra.Command {
+func newCmdSetNamespace(fsys fs.FileSystem, v ifc.Validator) *cobra.Command {
 	var o setNamespaceOptions
 
 	cmd := &cobra.Command{
@@ -45,6 +46,7 @@ will add the field "namespace: staging" to the kustomization file if it doesn't
 and overwrite the value with "staging" if the field does exist.
 `,
 		RunE: func(cmd *cobra.Command, args []string) error {
+			o.validator = v
 			err := o.Validate(args)
 			if err != nil {
 				return err
@@ -61,7 +63,7 @@ func (o *setNamespaceOptions) Validate(args []string) error {
 		return errors.New("must specify exactly one namespace value")
 	}
 	ns := args[0]
-	if errs := validation.IsDNS1123Label(ns); len(errs) != 0 {
+	if errs := o.validator.ValidateNamespace(ns); len(errs) != 0 {
 		return fmt.Errorf("%q is not a valid namespace name: %s", ns, strings.Join(errs, ";"))
 	}
 	o.namespace = ns

pkg/commands/setnamespace_test.go

@@ -23,6 +23,7 @@ import (
 
 	"sigs.k8s.io/kustomize/pkg/constants"
 	"sigs.k8s.io/kustomize/pkg/fs"
+	"sigs.k8s.io/kustomize/pkg/validators"
 )
 
 const (
@@ -33,7 +34,7 @@ func TestSetNamespaceHappyPath(t *testing.T) {
 	fakeFS := fs.MakeFakeFS()
 	fakeFS.WriteFile(constants.KustomizationFileName, []byte(kustomizationContent))
 
-	cmd := newCmdSetNamespace(fakeFS)
+	cmd := newCmdSetNamespace(fakeFS, validators.MakeFakeValidator())
 	args := []string{goodNamespaceValue}
 	err := cmd.RunE(cmd, args)
 	if err != nil {
@@ -53,7 +54,7 @@ func TestSetNamespaceOverride(t *testing.T) {
 	fakeFS := fs.MakeFakeFS()
 	fakeFS.WriteFile(constants.KustomizationFileName, []byte(kustomizationContent))
 
-	cmd := newCmdSetNamespace(fakeFS)
+	cmd := newCmdSetNamespace(fakeFS, validators.MakeFakeValidator())
 	args := []string{goodNamespaceValue}
 	err := cmd.RunE(cmd, args)
 	if err != nil {
@@ -77,7 +78,7 @@ func TestSetNamespaceOverride(t *testing.T) {
 func TestSetNamespaceNoArgs(t *testing.T) {
 	fakeFS := fs.MakeFakeFS()
 
-	cmd := newCmdSetNamespace(fakeFS)
+	cmd := newCmdSetNamespace(fakeFS, validators.MakeFakeValidator())
 	err := cmd.Execute()
 	if err == nil {
 		t.Errorf("expected error: %v", err)
@@ -91,7 +92,7 @@ func TestSetNamespaceInvalid(t *testing.T) {
 	fakeFS := fs.MakeFakeFS()
 	fakeFS.WriteFile(constants.KustomizationFileName, []byte(kustomizationContent))
 
-	cmd := newCmdSetNamespace(fakeFS)
+	cmd := newCmdSetNamespace(fakeFS, validators.MakeFakeValidator())
 	args := []string{"/badnamespace/"}
 	err := cmd.RunE(cmd, args)
 	if err == nil {

pkg/ifc/ifc.go

@@ -24,3 +24,10 @@ type Decoder interface {
 	// Decode yields the next object from the input, else io.EOF
 	Decode(interface{}) error
 }
+
+// Validator provides functions to validate annotations and labels
+type Validator interface {
+	MakeAnnotationValidator() func(map[string]string) error
+	MakeLabelValidator() func(map[string]string) error
+	ValidateNamespace(string) []string
+}

pkg/internal/k8sdeps/validators.go

@@ -0,0 +1,60 @@
+/*
+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 k8sdeps
+
+import (
+	"errors"
+	apivalidation "k8s.io/apimachinery/pkg/api/validation"
+	v1validation "k8s.io/apimachinery/pkg/apis/meta/v1/validation"
+	"k8s.io/apimachinery/pkg/util/validation"
+	"k8s.io/apimachinery/pkg/util/validation/field"
+)
+
+// KustValidator validates Labels and annotations by apimachinery
+type KustValidator struct{}
+
+// NewKustValidator returns a KustValidator object
+func NewKustValidator() *KustValidator {
+	return &KustValidator{}
+}
+
+// MakeAnnotationValidator returns a MapValidatorFunc using apimachinery.
+func (v *KustValidator) MakeAnnotationValidator() func(map[string]string) error {
+	return func(x map[string]string) error {
+		errs := apivalidation.ValidateAnnotations(x, field.NewPath("field"))
+		if errs != nil {
+			return errors.New(errs.ToAggregate().Error())
+		}
+		return nil
+	}
+}
+
+// MakeLabelValidator returns a MapValidatorFunc using apimachinery.
+func (v *KustValidator) MakeLabelValidator() func(map[string]string) error {
+	return func(x map[string]string) error {
+		errs := v1validation.ValidateLabels(x, field.NewPath("field"))
+		if errs != nil {
+			return errors.New(errs.ToAggregate().Error())
+		}
+		return nil
+	}
+}
+
+// ValidateNamespace validates a string is a valid namespace using apimachinery.
+func (v *KustValidator) ValidateNamespace(s string) []string {
+	return validation.IsDNS1123Label(s)
+}

pkg/validators/validators.go

@@ -1,38 +1,28 @@
+/*
+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 validators defines a FakeValidator that can be used in tests
 package validators
 
 import (
 	"errors"
-	apivalidation "k8s.io/apimachinery/pkg/api/validation"
-	v1validation "k8s.io/apimachinery/pkg/apis/meta/v1/validation"
-	"k8s.io/apimachinery/pkg/util/validation/field"
+	"regexp"
 	"testing"
 )
 
-// MapValidatorFunc returns an error if a map contains errors.
-type MapValidatorFunc func(map[string]string) error
-
-// MakeAnnotationValidator returns a MapValidatorFunc using apimachinery.
-func MakeAnnotationValidator() MapValidatorFunc {
-	return func(x map[string]string) error {
-		errs := apivalidation.ValidateAnnotations(x, field.NewPath("field"))
-		if len(errs) > 0 {
-			return errors.New(errs.ToAggregate().Error())
-		}
-		return nil
-	}
-}
-
-// MakeLabelValidator returns a MapValidatorFunc using apimachinery.
-func MakeLabelValidator() MapValidatorFunc {
-	return func(x map[string]string) error {
-		errs := v1validation.ValidateLabels(x, field.NewPath("field"))
-		if len(errs) > 0 {
-			return errors.New(errs.ToAggregate().Error())
-		}
-		return nil
-	}
-}
-
 // FakeValidator can be used in tests.
 type FakeValidator struct {
 	happy  bool
@@ -53,6 +43,30 @@ func MakeSadMapValidator(t *testing.T) *FakeValidator {
 	return &FakeValidator{happy: false, t: t}
 }
 
+// MakeFakeValidator makes an empty Fake Validator.
+func MakeFakeValidator() *FakeValidator {
+	return &FakeValidator{}
+}
+
+// MakeAnnotationValidator returns a nil function
+func (v *FakeValidator) MakeAnnotationValidator() func(map[string]string) error {
+	return nil
+}
+
+// MakeLabelValidator returns a nil function
+func (v *FakeValidator) MakeLabelValidator() func(map[string]string) error {
+	return nil
+}
+
+// ValidateNamespace validates namespace by regexp
+func (v *FakeValidator) ValidateNamespace(s string) []string {
+	pattern := regexp.MustCompile(`^[a-zA-Z].*`)
+	if pattern.MatchString(s) {
+		return nil
+	}
+	return []string{"doesn't match"}
+}
+
 // Validator replaces apimachinery validation in tests.
 // Can be set to fail or succeed to test error handling.
 // Can confirm if run or not run by surrounding code.