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/
resource_info.go
59 lines (46 loc) · 1.67 KB
/
resource_info.go
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/*
* Copyright (c) 2020 the Octant contributors. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
package cluster
import (
"fmt"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
)
// GroupVersionParserFunc is a function that parses a string group/version into a schema GroupVersion.
// If it is unable, it returns an error.
type GroupVersionParserFunc func(groupVersion string) (schema.GroupVersion, error)
// DiscoveryResourceInfo returns information about resources.
type DiscoveryResourceInfo struct {
resourceLists []*metav1.APIResourceList
groupVersionParser GroupVersionParserFunc
}
// NewDiscoveryResourceInfo creates an instance of DiscoveryResourceInfo.
func NewDiscoveryResourceInfo(resourceLists []*metav1.APIResourceList, optionList ...Option) *DiscoveryResourceInfo {
opts := buildOptions(optionList...)
dri := &DiscoveryResourceInfo{
resourceLists: resourceLists,
groupVersionParser: opts.groupVersionParser,
}
return dri
}
// PreferredVersion returns the preferred version for a group/kind pair.
func (dri *DiscoveryResourceInfo) PreferredVersion(groupKind schema.GroupKind) (string, error) {
for _, resourceList := range dri.resourceLists {
groupVersion, err := dri.groupVersionParser(resourceList.GroupVersion)
if err != nil {
return "", fmt.Errorf("parse group version %s: %w", resourceList.GroupVersion, err)
}
if groupVersion.Group != groupKind.Group {
continue
}
for _, apiResource := range resourceList.APIResources {
if apiResource.Kind != groupKind.Kind {
continue
}
return groupVersion.Version, nil
}
}
return "", fmt.Errorf("unknown version for %s", groupKind)
}