feat: kubesphere 4.0 (#6115)

* feat: kubesphere 4.0

Signed-off-by: ci-bot <ci-bot@kubesphere.io>

* feat: kubesphere 4.0

Signed-off-by: ci-bot <ci-bot@kubesphere.io>

---------

Signed-off-by: ci-bot <ci-bot@kubesphere.io>
Co-authored-by: ks-ci-bot <ks-ci-bot@example.com>
Co-authored-by: joyceliu <joyceliu@yunify.com>

vendor/k8s.io/apiextensions-apiserver/pkg/controller/openapi/builder/merge.go

@@ -0,0 +1,153 @@
+/*
+Copyright 2019 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 builder
+
+import (
+	"fmt"
+	"strings"
+
+	"k8s.io/kube-openapi/pkg/aggregator"
+	"k8s.io/kube-openapi/pkg/spec3"
+	"k8s.io/kube-openapi/pkg/validation/spec"
+)
+
+const metadataGV = "io.k8s.apimachinery.pkg.apis.meta.v1"
+const autoscalingGV = "io.k8s.api.autoscaling.v1"
+
+// MergeSpecs aggregates all OpenAPI specs, reusing the metadata of the first, static spec as the basis.
+// The static spec has the highest priority, and its paths and definitions won't get overlapped by
+// user-defined CRDs. None of the input is mutated, but input and output share data structures.
+func MergeSpecs(staticSpec *spec.Swagger, crdSpecs ...*spec.Swagger) (*spec.Swagger, error) {
+	// create shallow copy of staticSpec, but replace paths and definitions because we modify them.
+	specToReturn := *staticSpec
+	if staticSpec.Definitions != nil {
+		specToReturn.Definitions = make(spec.Definitions, len(staticSpec.Definitions))
+		for k, s := range staticSpec.Definitions {
+			specToReturn.Definitions[k] = s
+		}
+	}
+	if staticSpec.Parameters != nil {
+		specToReturn.Parameters = make(map[string]spec.Parameter, len(staticSpec.Parameters))
+		for k, s := range staticSpec.Parameters {
+			specToReturn.Parameters[k] = s
+		}
+	}
+	if staticSpec.Paths != nil {
+		specToReturn.Paths = &spec.Paths{
+			Paths: make(map[string]spec.PathItem, len(staticSpec.Paths.Paths)),
+		}
+		for k, p := range staticSpec.Paths.Paths {
+			specToReturn.Paths.Paths[k] = p
+		}
+	}
+
+	crdSpec := &spec.Swagger{}
+	for _, s := range crdSpecs {
+		// merge specs without checking conflicts, since the naming controller prevents
+		// conflicts between user-defined CRDs
+		mergeSpec(crdSpec, s)
+	}
+
+	// The static spec has the highest priority. Resolve conflicts to prevent user-defined
+	// CRDs potentially overlapping the built-in apiextensions API
+	if err := aggregator.MergeSpecsIgnorePathConflictRenamingDefinitionsAndParameters(&specToReturn, crdSpec); err != nil {
+		return nil, err
+	}
+	return &specToReturn, nil
+}
+
+// mergeSpec copies paths, parameters and definitions from source to dest, mutating dest, but not source.
+// We assume that conflicts do not matter.
+func mergeSpec(dest, source *spec.Swagger) {
+	if source == nil || source.Paths == nil {
+		return
+	}
+	if dest.Paths == nil {
+		dest.Paths = &spec.Paths{}
+	}
+	for k, v := range source.Definitions {
+		if dest.Definitions == nil {
+			dest.Definitions = make(spec.Definitions, len(source.Definitions))
+		}
+		dest.Definitions[k] = v
+	}
+	for k, v := range source.Parameters {
+		if dest.Parameters == nil {
+			dest.Parameters = make(map[string]spec.Parameter, len(source.Parameters))
+		}
+		dest.Parameters[k] = v
+	}
+	for k, v := range source.Paths.Paths {
+		if dest.Paths.Paths == nil {
+			dest.Paths.Paths = make(map[string]spec.PathItem, len(source.Paths.Paths))
+		}
+		dest.Paths.Paths[k] = v
+	}
+}
+
+// MergeSpecsV3 merges OpenAPI v3 specs for CRDs
+// Conflicts belonging to the meta.v1 or autoscaling.v1 group versions are skipped as all CRDs reference those types
+// Other conflicts will result in an error
+func MergeSpecsV3(crdSpecs ...*spec3.OpenAPI) (*spec3.OpenAPI, error) {
+	crdSpec := &spec3.OpenAPI{}
+	if len(crdSpecs) > 0 {
+		crdSpec.Version = crdSpecs[0].Version
+		crdSpec.Info = crdSpecs[0].Info
+	}
+	for _, s := range crdSpecs {
+		err := mergeSpecV3(crdSpec, s)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return crdSpec, nil
+}
+
+// mergeSpecV3 copies paths and definitions from source to dest, mutating dest, but not source.
+// Conflicts belonging to the meta.v1 or autoscaling.v1 group versions are skipped as all CRDs reference those types
+// Other conflicts will result in an error
+func mergeSpecV3(dest, source *spec3.OpenAPI) error {
+	if source == nil || source.Paths == nil {
+		return nil
+	}
+	if dest.Paths == nil {
+		dest.Paths = &spec3.Paths{}
+	}
+
+	for k, v := range source.Components.Schemas {
+		if dest.Components == nil {
+			dest.Components = &spec3.Components{}
+		}
+		if dest.Components.Schemas == nil {
+			dest.Components.Schemas = map[string]*spec.Schema{}
+		}
+		if _, exists := dest.Components.Schemas[k]; exists {
+			if strings.HasPrefix(k, metadataGV) || strings.HasPrefix(k, autoscalingGV) {
+				continue
+			}
+			return fmt.Errorf("OpenAPI V3 merge schema conflict on %s", k)
+		}
+		dest.Components.Schemas[k] = v
+	}
+	for k, v := range source.Paths.Paths {
+		if dest.Paths.Paths == nil {
+			dest.Paths.Paths = map[string]*spec3.Path{}
+		}
+		dest.Paths.Paths[k] = v
+	}
+	return nil
+}