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validators.go
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validators.go
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// Copyright 2019 The Kubernetes Authors.
// SPDX-License-Identifier: Apache-2.0
// Package validator provides functions to validate labels, annotations,
// namespaces and configmap/secret keys using apimachinery functions.
package validator
import (
"errors"
"fmt"
"strings"
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{}
}
func (v *KustValidator) ErrIfInvalidKey(k string) error {
if errs := validation.IsConfigMapKey(k); len(errs) != 0 {
return fmt.Errorf(
"%q is not a valid key name: %s",
k, strings.Join(errs, ";"))
}
return nil
}
func (v *KustValidator) IsEnvVarName(k string) error {
if errs := validation.IsEnvVarName(k); len(errs) != 0 {
return fmt.Errorf(
"%q is not a valid key name: %s",
k, strings.Join(errs, ";"))
}
return nil
}
// 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 len(errs) > 0 {
return errors.New(errs.ToAggregate().Error())
}
return nil
}
}
// MakeAnnotationNameValidator returns a MapValidatorFunc using apimachinery.
func (v *KustValidator) MakeAnnotationNameValidator() func([]string) error {
return func(x []string) error {
errs := field.ErrorList{}
fldPath := field.NewPath("field")
for _, k := range x {
for _, msg := range validation.IsQualifiedName(strings.ToLower(k)) {
errs = append(errs, field.Invalid(fldPath, k, msg))
}
}
if len(errs) > 0 {
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 len(errs) > 0 {
return errors.New(errs.ToAggregate().Error())
}
return nil
}
}
// MakeLabelNameValidator returns a ArrayValidatorFunc using apimachinery.
func (v *KustValidator) MakeLabelNameValidator() func([]string) error {
return func(x []string) error {
errs := field.ErrorList{}
fldPath := field.NewPath("field")
for _, k := range x {
errs = append(errs, v1validation.ValidateLabelName(k, fldPath)...)
}
if len(errs) > 0 {
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)
}