/*
 * Copyright © 2021 peizhaoyou <peizhaoyou@4paradigm.com>
 *
 * 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 k8sutil

import (
    "k8s.io/client-go/kubernetes"
    "k8s.io/client-go/rest"
    "k8s.io/client-go/tools/clientcmd"
    "os"
    "path/filepath"
)

// NewClient connects to an API server
func NewClient() (kubernetes.Interface, error) {
    kubeConfig := os.Getenv("KUBECONFIG")
    if kubeConfig == "" {
        kubeConfig = filepath.Join(os.Getenv("HOME"), ".kube", "config")
    }
    config, err := rest.InClusterConfig()
    if err != nil {
        config, err = clientcmd.BuildConfigFromFlags("", kubeConfig)
        if err != nil {
            return nil, err
        }
    }
    client, err := kubernetes.NewForConfig(config)
    return client, err
}
