knative.dev/pkg@v0.0.0-20260602142205-ac97e43f6622/webhook/helper.go (about)

     1  /*
     2  Copyright 2020 The Knative Authors
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package webhook
    18  
    19  import (
    20  	"strings"
    21  
    22  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    23  	"knative.dev/pkg/webhook/certificates/resources"
    24  )
    25  
    26  // EnsureLabelSelectorExpressions merges the current label selector's MatchExpressions
    27  // with the ones wanted.
    28  // It keeps all non-knative keys intact, removes all knative-keys no longer wanted and
    29  // adds all knative-keys not yet there.
    30  func EnsureLabelSelectorExpressions(
    31  	current *metav1.LabelSelector,
    32  	want *metav1.LabelSelector,
    33  ) *metav1.LabelSelector {
    34  	if current == nil {
    35  		return want
    36  	}
    37  
    38  	if len(current.MatchExpressions) == 0 {
    39  		return &metav1.LabelSelector{
    40  			MatchLabels:      current.MatchLabels,
    41  			MatchExpressions: want.MatchExpressions,
    42  		}
    43  	}
    44  
    45  	var wantExpressions []metav1.LabelSelectorRequirement
    46  	if want != nil {
    47  		wantExpressions = want.MatchExpressions
    48  	}
    49  
    50  	return &metav1.LabelSelector{
    51  		MatchLabels: current.MatchLabels,
    52  		MatchExpressions: ensureLabelSelectorRequirements(
    53  			current.MatchExpressions, wantExpressions),
    54  	}
    55  }
    56  
    57  func ensureLabelSelectorRequirements(
    58  	current []metav1.LabelSelectorRequirement,
    59  	want []metav1.LabelSelectorRequirement,
    60  ) []metav1.LabelSelectorRequirement {
    61  	nonKnative := make([]metav1.LabelSelectorRequirement, 0, len(current))
    62  	for _, r := range current {
    63  		if !strings.Contains(r.Key, "knative.dev") {
    64  			nonKnative = append(nonKnative, r)
    65  		}
    66  	}
    67  
    68  	return append(want, nonKnative...)
    69  }
    70  
    71  func getSecretDataKeyNamesOrDefault(sKey string, sCert string) (serverKey string, serverCert string) {
    72  	serverKey = resources.ServerKey
    73  	serverCert = resources.ServerCert
    74  
    75  	if sKey != "" {
    76  		serverKey = sKey
    77  	}
    78  	if sCert != "" {
    79  		serverCert = sCert
    80  	}
    81  	return serverKey, serverCert
    82  }