feat(helm): update helm view [r8s-256] (#582)

Co-authored-by: Cara Ryan <cara.ryan@portainer.io>
Co-authored-by: James Player <james.player@portainer.io>
Co-authored-by: stevensbkang <skan070@gmail.com>

pkg/libkubectl/client.go

@@ -0,0 +1,63 @@
+package libkubectl
+
+import (
+	"bytes"
+	"errors"
+
+	"k8s.io/cli-runtime/pkg/genericclioptions"
+	"k8s.io/cli-runtime/pkg/genericiooptions"
+	"k8s.io/kubectl/pkg/cmd/util"
+)
+
+type ClientAccess struct {
+	Token     string
+	ServerUrl string
+}
+
+type Client struct {
+	factory util.Factory
+	streams genericclioptions.IOStreams
+	out     *bytes.Buffer
+}
+
+// NewClient creates a new kubectl client
+func NewClient(libKubectlAccess *ClientAccess, namespace, kubeconfig string, insecure bool) (*Client, error) {
+	configFlags, err := generateConfigFlags(libKubectlAccess.Token, libKubectlAccess.ServerUrl, namespace, kubeconfig, insecure)
+	if err != nil {
+		return nil, err
+	}
+
+	streams, _, out, _ := genericiooptions.NewTestIOStreams()
+
+	return &Client{
+		factory: util.NewFactory(configFlags),
+		streams: streams,
+		out:     out,
+	}, nil
+}
+
+// generateConfigFlags generates the config flags for the kubectl client
+// If kubeconfigPath is provided, it will be used instead of server and token
+// If server and token are provided, they will be used to connect to the cluster
+// If neither kubeconfigPath or server and token are provided, an error will be returned
+func generateConfigFlags(token, server, namespace, kubeconfigPath string, insecure bool) (*genericclioptions.ConfigFlags, error) {
+	if kubeconfigPath == "" && (server == "" || token == "") {
+		return nil, errors.New("must provide either a kubeconfig path or a server and token")
+	}
+
+	configFlags := genericclioptions.NewConfigFlags(true)
+	if namespace != "" {
+		configFlags.Namespace = &namespace
+	}
+
+	if kubeconfigPath != "" {
+		configFlags.KubeConfig = &kubeconfigPath
+	} else {
+		configFlags.APIServer = &server
+		configFlags.BearerToken = &token
+	}
+
+	configFlags.Insecure = &insecure
+
+	return configFlags, nil
+}