mirror of
https://github.com/ceph/ceph-csi.git
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109 lines
4.1 KiB
Go
109 lines
4.1 KiB
Go
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/*
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Copyright 2022 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package discovery
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import (
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"fmt"
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apidiscovery "k8s.io/api/apidiscovery/v2beta1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime/schema"
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)
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// SplitGroupsAndResources transforms "aggregated" discovery top-level structure into
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// the previous "unaggregated" discovery groups and resources.
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func SplitGroupsAndResources(aggregatedGroups apidiscovery.APIGroupDiscoveryList) (*metav1.APIGroupList, map[schema.GroupVersion]*metav1.APIResourceList) {
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// Aggregated group list will contain the entirety of discovery, including
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// groups, versions, and resources.
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groups := []*metav1.APIGroup{}
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resourcesByGV := map[schema.GroupVersion]*metav1.APIResourceList{}
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for _, aggGroup := range aggregatedGroups.Items {
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group, resources := convertAPIGroup(aggGroup)
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groups = append(groups, group)
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for gv, resourceList := range resources {
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resourcesByGV[gv] = resourceList
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}
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}
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// Transform slice of groups to group list before returning.
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groupList := &metav1.APIGroupList{}
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groupList.Groups = make([]metav1.APIGroup, 0, len(groups))
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for _, group := range groups {
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groupList.Groups = append(groupList.Groups, *group)
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}
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return groupList, resourcesByGV
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}
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// convertAPIGroup tranforms an "aggregated" APIGroupDiscovery to an "legacy" APIGroup,
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// also returning the map of APIResourceList for resources within GroupVersions.
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func convertAPIGroup(g apidiscovery.APIGroupDiscovery) (*metav1.APIGroup, map[schema.GroupVersion]*metav1.APIResourceList) {
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// Iterate through versions to convert to group and resources.
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group := &metav1.APIGroup{}
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gvResources := map[schema.GroupVersion]*metav1.APIResourceList{}
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group.Name = g.ObjectMeta.Name
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for i, v := range g.Versions {
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version := metav1.GroupVersionForDiscovery{}
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gv := schema.GroupVersion{Group: g.Name, Version: v.Version}
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version.GroupVersion = gv.String()
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version.Version = v.Version
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group.Versions = append(group.Versions, version)
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if i == 0 {
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group.PreferredVersion = version
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}
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resourceList := &metav1.APIResourceList{}
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resourceList.GroupVersion = gv.String()
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for _, r := range v.Resources {
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resource := convertAPIResource(r)
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resourceList.APIResources = append(resourceList.APIResources, resource)
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// Subresources field in new format get transformed into full APIResources.
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for _, subresource := range r.Subresources {
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sr := convertAPISubresource(resource, subresource)
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resourceList.APIResources = append(resourceList.APIResources, sr)
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}
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}
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gvResources[gv] = resourceList
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}
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return group, gvResources
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}
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// convertAPIResource tranforms a APIResourceDiscovery to an APIResource.
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func convertAPIResource(in apidiscovery.APIResourceDiscovery) metav1.APIResource {
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return metav1.APIResource{
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Name: in.Resource,
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SingularName: in.SingularResource,
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Namespaced: in.Scope == apidiscovery.ScopeNamespace,
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Group: in.ResponseKind.Group,
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Version: in.ResponseKind.Version,
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Kind: in.ResponseKind.Kind,
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Verbs: in.Verbs,
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ShortNames: in.ShortNames,
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Categories: in.Categories,
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}
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}
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// convertAPISubresource tranforms a APISubresourceDiscovery to an APIResource.
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func convertAPISubresource(parent metav1.APIResource, in apidiscovery.APISubresourceDiscovery) metav1.APIResource {
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return metav1.APIResource{
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Name: fmt.Sprintf("%s/%s", parent.Name, in.Subresource),
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SingularName: parent.SingularName,
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Namespaced: parent.Namespaced,
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Group: in.ResponseKind.Group,
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Version: in.ResponseKind.Version,
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Kind: in.ResponseKind.Kind,
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Verbs: in.Verbs,
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}
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}
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