feat: add crd gen

Signed-off-by: runzexia <runzexia@yunify.com>

vendor/k8s.io/apiserver/pkg/admission/plugin/webhook/rules/rules.go

@@ -0,0 +1,107 @@
+/*
+Copyright 2017 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 rules
+
+import (
+	"strings"
+
+	"k8s.io/api/admissionregistration/v1beta1"
+	"k8s.io/apiserver/pkg/admission"
+)
+
+// Matcher determines if the Attr matches the Rule.
+type Matcher struct {
+	Rule v1beta1.RuleWithOperations
+	Attr admission.Attributes
+}
+
+// Matches returns if the Attr matches the Rule.
+func (r *Matcher) Matches() bool {
+	return r.operation() &&
+		r.group() &&
+		r.version() &&
+		r.resource()
+}
+
+func exactOrWildcard(items []string, requested string) bool {
+	for _, item := range items {
+		if item == "*" {
+			return true
+		}
+		if item == requested {
+			return true
+		}
+	}
+
+	return false
+}
+
+func (r *Matcher) group() bool {
+	return exactOrWildcard(r.Rule.APIGroups, r.Attr.GetResource().Group)
+}
+
+func (r *Matcher) version() bool {
+	return exactOrWildcard(r.Rule.APIVersions, r.Attr.GetResource().Version)
+}
+
+func (r *Matcher) operation() bool {
+	attrOp := r.Attr.GetOperation()
+	for _, op := range r.Rule.Operations {
+		if op == v1beta1.OperationAll {
+			return true
+		}
+		// The constants are the same such that this is a valid cast (and this
+		// is tested).
+		if op == v1beta1.OperationType(attrOp) {
+			return true
+		}
+	}
+	return false
+}
+
+func splitResource(resSub string) (res, sub string) {
+	parts := strings.SplitN(resSub, "/", 2)
+	if len(parts) == 2 {
+		return parts[0], parts[1]
+	}
+	return parts[0], ""
+}
+
+func (r *Matcher) resource() bool {
+	opRes, opSub := r.Attr.GetResource().Resource, r.Attr.GetSubresource()
+	for _, res := range r.Rule.Resources {
+		res, sub := splitResource(res)
+		resMatch := res == "*" || res == opRes
+		subMatch := sub == "*" || sub == opSub
+		if resMatch && subMatch {
+			return true
+		}
+	}
+	return false
+}
+
+// IsWebhookConfigurationResource determines if an admission.Attributes object is describing
+// the admission of a ValidatingWebhookConfiguration or a MutatingWebhookConfiguration
+func IsWebhookConfigurationResource(attr admission.Attributes) bool {
+	gvk := attr.GetKind()
+	if gvk.Group == "admissionregistration.k8s.io" {
+		if gvk.Kind == "ValidatingWebhookConfiguration" || gvk.Kind == "MutatingWebhookConfiguration" {
+			return true
+		}
+	}
+	return false
+}