Add validator interface

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)
+}