helmcli: add GetCli client

Signed-off-by: Wei Fu <weifu@microsoft.com>

helmcli/get.go

@@ -0,0 +1,41 @@
+package helmcli
+
+import (
+	"fmt"
+
+	"helm.sh/helm/v3/pkg/action"
+	"helm.sh/helm/v3/pkg/release"
+	"k8s.io/cli-runtime/pkg/genericclioptions"
+)
+
+// GetCli is a client to get helm chart from secret storage.
+type GetCli struct {
+	namespace string
+
+	cfg *action.Configuration
+}
+
+// NewGetCli returns new GetCli instance.
+func NewGetCli(kubeconfigPath string, namespace string) (*GetCli, error) {
+	actionCfg := new(action.Configuration)
+	if err := actionCfg.Init(
+		&genericclioptions.ConfigFlags{
+			KubeConfig: &kubeconfigPath,
+		},
+		namespace,
+		"secret",
+		noopLog,
+	); err != nil {
+		return nil, fmt.Errorf("failed to init action config: %w", err)
+	}
+	return &GetCli{
+		namespace: namespace,
+		cfg:       actionCfg,
+	}, nil
+}
+
+// Get returns all the information about that given release.
+func (cli *GetCli) Get(releaseName string) (*release.Release, error) {
+	getCli := action.NewGet(cli.cfg)
+	return getCli.Run(releaseName)
+}