mirror of https://github.com/k3s-io/k3s
129 lines
3.3 KiB
Go
129 lines
3.3 KiB
Go
/*
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Copyright 2017 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 openapi
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import (
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openapi_v2 "github.com/googleapis/gnostic/openapiv2"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/kube-openapi/pkg/util/proto"
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)
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// Resources interface describe a resources provider, that can give you
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// resource based on group-version-kind.
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type Resources interface {
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LookupResource(gvk schema.GroupVersionKind) proto.Schema
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}
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// groupVersionKindExtensionKey is the key used to lookup the
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// GroupVersionKind value for an object definition from the
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// definition's "extensions" map.
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const groupVersionKindExtensionKey = "x-kubernetes-group-version-kind"
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// document is an implementation of `Resources`. It looks for
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// resources in an openapi Schema.
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type document struct {
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// Maps gvk to model name
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resources map[schema.GroupVersionKind]string
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models proto.Models
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}
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var _ Resources = &document{}
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// NewOpenAPIData creates a new `Resources` out of the openapi document
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func NewOpenAPIData(doc *openapi_v2.Document) (Resources, error) {
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models, err := proto.NewOpenAPIData(doc)
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if err != nil {
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return nil, err
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}
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resources := map[schema.GroupVersionKind]string{}
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for _, modelName := range models.ListModels() {
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model := models.LookupModel(modelName)
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if model == nil {
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panic("ListModels returns a model that can't be looked-up.")
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}
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gvkList := parseGroupVersionKind(model)
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for _, gvk := range gvkList {
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if len(gvk.Kind) > 0 {
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resources[gvk] = modelName
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}
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}
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}
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return &document{
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resources: resources,
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models: models,
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}, nil
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}
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func (d *document) LookupResource(gvk schema.GroupVersionKind) proto.Schema {
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modelName, found := d.resources[gvk]
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if !found {
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return nil
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}
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return d.models.LookupModel(modelName)
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}
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// Get and parse GroupVersionKind from the extension. Returns empty if it doesn't have one.
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func parseGroupVersionKind(s proto.Schema) []schema.GroupVersionKind {
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extensions := s.GetExtensions()
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gvkListResult := []schema.GroupVersionKind{}
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// Get the extensions
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gvkExtension, ok := extensions[groupVersionKindExtensionKey]
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if !ok {
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return []schema.GroupVersionKind{}
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}
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// gvk extension must be a list of at least 1 element.
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gvkList, ok := gvkExtension.([]interface{})
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if !ok {
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return []schema.GroupVersionKind{}
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}
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for _, gvk := range gvkList {
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// gvk extension list must be a map with group, version, and
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// kind fields
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gvkMap, ok := gvk.(map[interface{}]interface{})
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if !ok {
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continue
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}
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group, ok := gvkMap["group"].(string)
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if !ok {
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continue
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}
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version, ok := gvkMap["version"].(string)
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if !ok {
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continue
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}
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kind, ok := gvkMap["kind"].(string)
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if !ok {
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continue
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}
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gvkListResult = append(gvkListResult, schema.GroupVersionKind{
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Group: group,
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Version: version,
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Kind: kind,
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})
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}
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return gvkListResult
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}
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