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generic_defaulter.go
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generic_defaulter.go
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// Copyright 2022 Google LLC
//
// 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 webhook
import (
"context"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
)
// A generic webhook defaulter that is meant to handle various miscellaneous defaulting.
// The reasons to have a generic defaulter are 1) to avoid the heavyweight boilerplate code
// of registering new webhook handlers and 2) to avoid adding a new entry in the MutatingWebhookConfiguration object with almost all KCC resources listed
// every time we introduce a new feature across the board.
//
// This defaulter should only contain lightweight defaulting logic, for complicated defaulting
// functions, it's recommended to create dedicated webhook handlers.
type genericDefaulter struct {
}
func NewGenericDefaulter() HandlerFunc {
return func(mgr manager.Manager) admission.Handler {
return &genericDefaulter{}
}
}
func (a *genericDefaulter) Handle(ctx context.Context, req admission.Request) admission.Response { //nolint:revive
return admission.ValidationResponse(true, "no-op: this webhook is deprecated")
}