// serverPreferredResources returns the supported resources with the version preferred by the
// server. If namespaced is true, only namespaced resources will be returned.
func (d *DiscoveryClient) serverPreferredResources(namespaced bool) ([]unversioned.GroupVersionResource, error) {
// retry in case the groups supported by the server change after ServerGroup() returns.
const maxRetries = 2
var failedGroups map[unversioned.GroupVersion]error
var results []unversioned.GroupVersionResource
RetrieveGroups:
for i := 0; i < maxRetries; i++ {
results = []unversioned.GroupVersionResource{}
failedGroups = make(map[unversioned.GroupVersion]error)
serverGroupList, err := d.ServerGroups()
if err != nil {
return results, err
}
for _, apiGroup := range serverGroupList.Groups {
preferredVersion := apiGroup.PreferredVersion
groupVersion := unversioned.GroupVersion{Group: apiGroup.Name, Version: preferredVersion.Version}
apiResourceList, err := d.ServerResourcesForGroupVersion(preferredVersion.GroupVersion)
if err != nil {
if i < maxRetries-1 {
continue RetrieveGroups
}
failedGroups[groupVersion] = err
continue
}
for _, apiResource := range apiResourceList.APIResources {
// ignore the root scoped resources if "namespaced" is true.
if namespaced && !apiResource.Namespaced {
continue
}
if strings.Contains(apiResource.Name, "/") {
continue
}
results = append(results, groupVersion.WithResource(apiResource.Name))
}
}
if len(failedGroups) == 0 {
return results, nil
}
}
return results, &ErrGroupDiscoveryFailed{Groups: failedGroups}
}
