feat: add crd gen

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

vendor/k8s.io/apiserver/pkg/registry/rest/create.go

@@ -0,0 +1,183 @@
+/*
+Copyright 2014 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 rest
+
+import (
+	"context"
+
+	"k8s.io/apimachinery/pkg/api/errors"
+	"k8s.io/apimachinery/pkg/api/meta"
+	genericvalidation "k8s.io/apimachinery/pkg/api/validation"
+	"k8s.io/apimachinery/pkg/api/validation/path"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/apimachinery/pkg/util/validation/field"
+	"k8s.io/apiserver/pkg/admission"
+	"k8s.io/apiserver/pkg/features"
+	"k8s.io/apiserver/pkg/storage/names"
+	utilfeature "k8s.io/apiserver/pkg/util/feature"
+)
+
+// RESTCreateStrategy defines the minimum validation, accepted input, and
+// name generation behavior to create an object that follows Kubernetes
+// API conventions.
+type RESTCreateStrategy interface {
+	runtime.ObjectTyper
+	// The name generator is used when the standard GenerateName field is set.
+	// The NameGenerator will be invoked prior to validation.
+	names.NameGenerator
+
+	// NamespaceScoped returns true if the object must be within a namespace.
+	NamespaceScoped() bool
+	// PrepareForCreate is invoked on create before validation to normalize
+	// the object.  For example: remove fields that are not to be persisted,
+	// sort order-insensitive list fields, etc.  This should not remove fields
+	// whose presence would be considered a validation error.
+	//
+	// Often implemented as a type check and an initailization or clearing of
+	// status. Clear the status because status changes are internal. External
+	// callers of an api (users) should not be setting an initial status on
+	// newly created objects.
+	PrepareForCreate(ctx context.Context, obj runtime.Object)
+	// Validate returns an ErrorList with validation errors or nil.  Validate
+	// is invoked after default fields in the object have been filled in
+	// before the object is persisted.  This method should not mutate the
+	// object.
+	Validate(ctx context.Context, obj runtime.Object) field.ErrorList
+	// Canonicalize allows an object to be mutated into a canonical form. This
+	// ensures that code that operates on these objects can rely on the common
+	// form for things like comparison.  Canonicalize is invoked after
+	// validation has succeeded but before the object has been persisted.
+	// This method may mutate the object. Often implemented as a type check or
+	// empty method.
+	Canonicalize(obj runtime.Object)
+}
+
+// BeforeCreate ensures that common operations for all resources are performed on creation. It only returns
+// errors that can be converted to api.Status. It invokes PrepareForCreate, then GenerateName, then Validate.
+// It returns nil if the object should be created.
+func BeforeCreate(strategy RESTCreateStrategy, ctx context.Context, obj runtime.Object) error {
+	objectMeta, kind, kerr := objectMetaAndKind(strategy, obj)
+	if kerr != nil {
+		return kerr
+	}
+
+	if strategy.NamespaceScoped() {
+		if !ValidNamespace(ctx, objectMeta) {
+			return errors.NewBadRequest("the namespace of the provided object does not match the namespace sent on the request")
+		}
+	} else if len(objectMeta.GetNamespace()) > 0 {
+		objectMeta.SetNamespace(metav1.NamespaceNone)
+	}
+	objectMeta.SetDeletionTimestamp(nil)
+	objectMeta.SetDeletionGracePeriodSeconds(nil)
+	strategy.PrepareForCreate(ctx, obj)
+	FillObjectMetaSystemFields(objectMeta)
+	if len(objectMeta.GetGenerateName()) > 0 && len(objectMeta.GetName()) == 0 {
+		objectMeta.SetName(strategy.GenerateName(objectMeta.GetGenerateName()))
+	}
+
+	// Ensure Initializers are not set unless the feature is enabled
+	if !utilfeature.DefaultFeatureGate.Enabled(features.Initializers) {
+		objectMeta.SetInitializers(nil)
+	}
+
+	// ClusterName is ignored and should not be saved
+	if len(objectMeta.GetClusterName()) > 0 {
+		objectMeta.SetClusterName("")
+	}
+
+	if errs := strategy.Validate(ctx, obj); len(errs) > 0 {
+		return errors.NewInvalid(kind.GroupKind(), objectMeta.GetName(), errs)
+	}
+
+	// Custom validation (including name validation) passed
+	// Now run common validation on object meta
+	// Do this *after* custom validation so that specific error messages are shown whenever possible
+	if errs := genericvalidation.ValidateObjectMetaAccessor(objectMeta, strategy.NamespaceScoped(), path.ValidatePathSegmentName, field.NewPath("metadata")); len(errs) > 0 {
+		return errors.NewInvalid(kind.GroupKind(), objectMeta.GetName(), errs)
+	}
+
+	strategy.Canonicalize(obj)
+
+	return nil
+}
+
+// CheckGeneratedNameError checks whether an error that occurred creating a resource is due
+// to generation being unable to pick a valid name.
+func CheckGeneratedNameError(strategy RESTCreateStrategy, err error, obj runtime.Object) error {
+	if !errors.IsAlreadyExists(err) {
+		return err
+	}
+
+	objectMeta, kind, kerr := objectMetaAndKind(strategy, obj)
+	if kerr != nil {
+		return kerr
+	}
+
+	if len(objectMeta.GetGenerateName()) == 0 {
+		return err
+	}
+
+	return errors.NewServerTimeoutForKind(kind.GroupKind(), "POST", 0)
+}
+
+// objectMetaAndKind retrieves kind and ObjectMeta from a runtime object, or returns an error.
+func objectMetaAndKind(typer runtime.ObjectTyper, obj runtime.Object) (metav1.Object, schema.GroupVersionKind, error) {
+	objectMeta, err := meta.Accessor(obj)
+	if err != nil {
+		return nil, schema.GroupVersionKind{}, errors.NewInternalError(err)
+	}
+	kinds, _, err := typer.ObjectKinds(obj)
+	if err != nil {
+		return nil, schema.GroupVersionKind{}, errors.NewInternalError(err)
+	}
+	return objectMeta, kinds[0], nil
+}
+
+// NamespaceScopedStrategy has a method to tell if the object must be in a namespace.
+type NamespaceScopedStrategy interface {
+	// NamespaceScoped returns if the object must be in a namespace.
+	NamespaceScoped() bool
+}
+
+// AdmissionToValidateObjectFunc converts validating admission to a rest validate object func
+func AdmissionToValidateObjectFunc(admit admission.Interface, staticAttributes admission.Attributes) ValidateObjectFunc {
+	validatingAdmission, ok := admit.(admission.ValidationInterface)
+	if !ok {
+		return func(obj runtime.Object) error { return nil }
+	}
+	return func(obj runtime.Object) error {
+		finalAttributes := admission.NewAttributesRecord(
+			obj,
+			staticAttributes.GetOldObject(),
+			staticAttributes.GetKind(),
+			staticAttributes.GetNamespace(),
+			staticAttributes.GetName(),
+			staticAttributes.GetResource(),
+			staticAttributes.GetSubresource(),
+			staticAttributes.GetOperation(),
+			staticAttributes.IsDryRun(),
+			staticAttributes.GetUserInfo(),
+		)
+		if !validatingAdmission.Handles(finalAttributes.GetOperation()) {
+			return nil
+		}
+		return validatingAdmission.Validate(finalAttributes)
+	}
+}