0becca2e96
CNI is developed by more than just CoreOS, Inc and the copyright is retained by all CNI contributors (for their respective contributed code).
86 lines
2.1 KiB
Go
86 lines
2.1 KiB
Go
// Copyright 2015 CNI authors
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package libcni
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"sort"
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)
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func ConfFromBytes(bytes []byte) (*NetworkConfig, error) {
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conf := &NetworkConfig{Bytes: bytes}
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if err := json.Unmarshal(bytes, &conf.Network); err != nil {
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return nil, fmt.Errorf("error parsing configuration: %s", err)
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}
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return conf, nil
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}
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func ConfFromFile(filename string) (*NetworkConfig, error) {
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bytes, err := ioutil.ReadFile(filename)
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if err != nil {
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return nil, fmt.Errorf("error reading %s: %s", filename, err)
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}
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return ConfFromBytes(bytes)
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}
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func ConfFiles(dir string) ([]string, error) {
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// In part, adapted from rkt/networking/podenv.go#listFiles
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files, err := ioutil.ReadDir(dir)
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switch {
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case err == nil: // break
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case os.IsNotExist(err):
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return nil, nil
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default:
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return nil, err
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}
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confFiles := []string{}
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for _, f := range files {
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if f.IsDir() {
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continue
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}
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if filepath.Ext(f.Name()) == ".conf" {
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confFiles = append(confFiles, filepath.Join(dir, f.Name()))
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}
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}
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return confFiles, nil
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}
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func LoadConf(dir, name string) (*NetworkConfig, error) {
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files, err := ConfFiles(dir)
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switch {
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case err != nil:
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return nil, err
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case len(files) == 0:
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return nil, fmt.Errorf("no net configurations found")
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}
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sort.Strings(files)
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for _, confFile := range files {
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conf, err := ConfFromFile(confFile)
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if err != nil {
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return nil, err
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}
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if conf.Network.Name == name {
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return conf, nil
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}
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}
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return nil, fmt.Errorf(`no net configuration with name "%s" in %s`, name, dir)
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}
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