feat: allow customizing generated webhook's name

closes kubernetes-sigs#865

pkg/webhook/parser.go

@@ -102,6 +102,9 @@ type Config struct {
 	// Name indicates the name of this webhook configuration. Should be a domain with at least three segments separated by dots
 	Name string
 
+	// K8sName indicates the K8s name of this webhook configuration.
+	K8sName string `marker:"k8sName,optional"`
+
 	// Path specifies that path that the API server should connect to this webhook on. Must be
 	// prefixed with a '/validate-' or '/mutate-' depending on the type, and followed by
 	// $GROUP-$VERSION-$KIND where all values are lower-cased and the periods in the group
@@ -370,6 +373,9 @@ func (g Generator) Generate(ctx *genall.GenerationContext) error {
 	supportedWebhookVersions := supportedWebhookVersions()
 	mutatingCfgs := make(map[string][]admissionregv1.MutatingWebhook, len(supportedWebhookVersions))
 	validatingCfgs := make(map[string][]admissionregv1.ValidatingWebhook, len(supportedWebhookVersions))
+	mutatingWebhookConfigurationK8sName := "mutating-webhook-configuration"
+	validatingWebhookConfigurationK8sName := "validating-webhook-configuration"
+
 	for _, root := range ctx.Roots {
 		markerSet, err := markers.PackageMarkers(ctx.Collector, root)
 		if err != nil {
@@ -395,6 +401,9 @@ func (g Generator) Generate(ctx *genall.GenerationContext) error {
 				for _, webhookVersion := range webhookVersions {
 					mutatingCfgs[webhookVersion] = append(mutatingCfgs[webhookVersion], w)
 				}
+				if cfg.K8sName != "" {
+					mutatingWebhookConfigurationK8sName = cfg.K8sName
+				}
 			} else {
 				w, err := cfg.ToValidatingWebhook()
 				if err != nil {
@@ -403,6 +412,9 @@ func (g Generator) Generate(ctx *genall.GenerationContext) error {
 				for _, webhookVersion := range webhookVersions {
 					validatingCfgs[webhookVersion] = append(validatingCfgs[webhookVersion], w)
 				}
+				if cfg.K8sName != "" {
+					validatingWebhookConfigurationK8sName = cfg.K8sName
+				}
 			}
 		}
 	}
@@ -418,7 +430,7 @@ func (g Generator) Generate(ctx *genall.GenerationContext) error {
 				Version: version,
 				Kind:    "MutatingWebhookConfiguration",
 			})
-			objRaw.SetName("mutating-webhook-configuration")
+			objRaw.SetName(mutatingWebhookConfigurationK8sName)
 			objRaw.Webhooks = cfgs
 			for i := range objRaw.Webhooks {
 				// SideEffects is required in admissionregistration/v1, if this is not set or set to `Some` or `Known`,
@@ -449,7 +461,7 @@ func (g Generator) Generate(ctx *genall.GenerationContext) error {
 				Version: version,
 				Kind:    "ValidatingWebhookConfiguration",
 			})
-			objRaw.SetName("validating-webhook-configuration")
+			objRaw.SetName(validatingWebhookConfigurationK8sName)
 			objRaw.Webhooks = cfgs
 			for i := range objRaw.Webhooks {
 				// SideEffects is required in admissionregistration/v1, if this is not set or set to `Some` or `Known`,