From f05ba2b1a9bb78d9d749024668ac6e330faec0c0 Mon Sep 17 00:00:00 2001
From: Matt Butcher <mbutcher@engineyard.com>
Date: Mon, 26 Sep 2016 17:48:21 -0600
Subject: [PATCH] fix(helm): if server is old, report this in a friendly way

If 'helm version' is run on an old server, it will emit an error telling
you the server is too old.

Closes #1223
---
 cmd/helm/version.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/cmd/helm/version.go b/cmd/helm/version.go
index e22d0a800..1242a4667 100644
--- a/cmd/helm/version.go
+++ b/cmd/helm/version.go
@@ -17,10 +17,13 @@ limitations under the License.
 package main
 
 import (
+	"errors"
 	"fmt"
 	"io"
 
 	"github.com/spf13/cobra"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
 
 	"k8s.io/helm/pkg/helm"
 	"k8s.io/helm/pkg/version"
@@ -56,6 +59,9 @@ func (v *versionCmd) run() error {
 
 	resp, err := v.client.GetVersion()
 	if err != nil {
+		if grpc.Code(err) == codes.Unimplemented {
+			return errors.New("server is too old to know its version")
+		}
 		return err
 	}
 	fmt.Fprintf(v.out, "Server: %#v\n", resp.Version)