Writing a Kubernetes CLI in Go

client.go

package client

import (
    "k8s.io/client-go/kubernetes"
    "k8s.io/client-go/rest"
    "k8s.io/client-go/tools/clientcmd"
    clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
)

// GetLocal reads a user's KUBECONFIG file and returns a Client interface, a REST interface, and current namespace
func GetLocal() (*kubernetes.Clientset, *rest.Config, string, error) {
    var err error

    clientConfig := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(
        clientcmd.NewDefaultClientConfigLoadingRules(),
        &clientcmd.ConfigOverrides{ClusterInfo: clientcmdapi.Cluster{Server: ""}})

    namespace, _, err := clientConfig.Namespace()
    if err != nil {
        return nil, nil, "", err
    }

    config, err := clientConfig.ClientConfig()
    if err != nil {
        return nil, nil, "", err
    }

    client, err := kubernetes.NewForConfig(config)
    if err != nil {
        return nil, nil, "", err
    }
    return client, config, namespace, nil
}