/
kubeconfig.go
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/
kubeconfig.go
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// Copyright 2021 Monoskope 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 k8s
import (
"errors"
"os"
"path"
"path/filepath"
"strings"
"github.com/finleap-connect/monoctl/internal/prompt"
"github.com/finleap-connect/monoskope/pkg/logger"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/client-go/tools/clientcmd/api"
"k8s.io/client-go/util/homedir"
)
const kubeConfigEnvVar = "KUBECONFIG"
type KubeConfig struct {
log logger.Logger
ConfigPath string
}
func NewKubeConfig() *KubeConfig {
return &KubeConfig{
log: logger.WithName("KubeConfig"),
}
}
func (k *KubeConfig) LoadConfig() (*api.Config, error) {
if k.ConfigPath == "" {
k.ConfigPath = os.Getenv(kubeConfigEnvVar)
}
if k.ConfigPath != "" {
fileList := filepath.SplitList(k.ConfigPath)
if len(fileList) > 1 {
var err error
_, k.ConfigPath, err = prompt.SelectWithAdd(
"please specify a config file",
"Create new",
fileList,
)
if err != nil {
return nil, err
}
}
}
if k.ConfigPath == "" {
k.ConfigPath = path.Join("~", ".kube", "config")
}
k.ConfigPath = os.ExpandEnv(k.ConfigPath)
if strings.HasPrefix(k.ConfigPath, "~/") {
homeDir := homedir.HomeDir()
if homeDir == "" {
return nil, errors.New("couldn't determine home directory")
}
k.ConfigPath = filepath.Join(homeDir, k.ConfigPath[2:])
}
if _, err := os.Stat(k.ConfigPath); err != nil {
if os.IsNotExist(err) {
return api.NewConfig(), nil
} else {
return nil, err
}
}
config, err := clientcmd.LoadFromFile(k.ConfigPath)
if err != nil {
return nil, err
}
return config, nil
}
func (k *KubeConfig) StoreConfig(conf *api.Config) error {
return clientcmd.WriteToFile(*conf, k.ConfigPath)
}
func (k *KubeConfig) SetPath(path string) {
k.ConfigPath = path
}