/
apiservice.go
171 lines (143 loc) · 4.52 KB
/
apiservice.go
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// Copyright 2022 OnMetal 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 envtestutils
import (
"bufio"
"bytes"
"io"
"io/ioutil"
"os"
"path/filepath"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/util/sets"
k8syaml "k8s.io/apimachinery/pkg/util/yaml"
"k8s.io/client-go/kubernetes/scheme"
apiregistrationv1 "k8s.io/kube-aggregator/pkg/apis/apiregistration/v1"
"sigs.k8s.io/yaml"
)
var (
apiServiceScheme = scheme.Scheme
)
func init() {
_ = apiregistrationv1.AddToScheme(apiServiceScheme)
}
// readAPIServiceFiles reads the directories of APIService in options.Paths and adds the APIService structs to options.APIServices.
func readAPIServiceFiles(options *APIServiceInstallOptions) error {
if len(options.Paths) > 0 {
apiServiceList, err := renderAPIServices(options)
if err != nil {
return err
}
options.APIServices = append(options.APIServices, apiServiceList...)
}
return nil
}
// renderAPIServices iterate through options.Paths and extract all APIService files.
func renderAPIServices(options *APIServiceInstallOptions) ([]*apiregistrationv1.APIService, error) {
var (
err error
info os.FileInfo
files []os.FileInfo
)
type GVKN struct {
GVK schema.GroupVersionKind
Name string
}
apiServices := make(map[GVKN]*apiregistrationv1.APIService)
for _, path := range options.Paths {
var filePath = path
// Return the error if ErrorIfPathMissing exists
if info, err = os.Stat(path); os.IsNotExist(err) {
if options.ErrorIfPathMissing {
return nil, err
}
continue
}
if !info.IsDir() {
filePath, files = filepath.Dir(path), []os.FileInfo{info}
} else if files, err = ioutil.ReadDir(path); err != nil {
return nil, err
}
log.V(1).Info("reading APIServices from path", "path", path)
apiServiceList, err := readAPIServices(filePath, files)
if err != nil {
return nil, err
}
for i, apiService := range apiServiceList {
gvkn := GVKN{GVK: apiService.GroupVersionKind(), Name: apiService.GetName()}
if _, found := apiServices[gvkn]; found {
// Currently, we only print a log when there are duplicates. We may want to error out if that makes more sense.
log.Info("there are more than one APIService definitions with the same <Group, Version, Kind, GetName>", "GVKN", gvkn)
}
// We always use the APIService definition that we found last.
apiServices[gvkn] = apiServiceList[i]
}
}
// Converting map to a list to return
var res []*apiregistrationv1.APIService
for _, obj := range apiServices {
res = append(res, obj)
}
return res, nil
}
// readAPIServices reads the CRDs from files and Unmarshals them into structs.
func readAPIServices(basePath string, files []os.FileInfo) ([]*apiregistrationv1.APIService, error) {
var apiServices []*apiregistrationv1.APIService
// White list the file extensions that may contain k8s manifests
exts := sets.NewString(".json", ".yaml", ".yml")
for _, file := range files {
// Only parse allowlisted file types
if !exts.Has(filepath.Ext(file.Name())) {
continue
}
// Unmarshal APIServices from file into structs
docs, err := readDocuments(filepath.Join(basePath, file.Name()))
if err != nil {
return nil, err
}
for _, doc := range docs {
apiService := &apiregistrationv1.APIService{}
if err = yaml.Unmarshal(doc, apiService); err != nil {
return nil, err
}
if apiService.Kind != "APIService" || apiService.Spec.Group == "" || apiService.Spec.Version == "" {
continue
}
apiServices = append(apiServices, apiService)
}
log.V(1).Info("read APIServices from file", "file", file.Name())
}
return apiServices, nil
}
// readDocuments reads documents from file.
func readDocuments(fp string) ([][]byte, error) {
b, err := os.ReadFile(fp) //nolint:gosec
if err != nil {
return nil, err
}
var docs [][]byte
reader := k8syaml.NewYAMLReader(bufio.NewReader(bytes.NewReader(b)))
for {
// Read document
doc, err := reader.Read()
if err != nil {
if err == io.EOF {
break
}
return nil, err
}
docs = append(docs, doc)
}
return docs, nil
}