cli: Shows message for no meshes

cmd/cli/version.go

@@ -171,7 +171,10 @@ func (r *remoteVersion) proxyGetMeshVersion(pod string, namespace string, client
 }
 
 func (v *versionCmd) outputPrettyVersionInfo(remoteVerList []*remoteVersionInfo) string {
-	table := "\nMESH NAME\tMESH NAMESPACE\tVERSION\tGIT COMMIT\tBUILD DATE\n"
+	table := "No meshes in the cluster\n"
+	if remoteVerList != nil {
+		table = "\nMESH NAME\tMESH NAMESPACE\tVERSION\tGIT COMMIT\tBUILD DATE\n"
+	}
 	for _, remoteVersionInfo := range remoteVerList {
 		if remoteVersionInfo != nil && remoteVersionInfo.meshName != "" {
 			table += fmt.Sprintf(

cmd/cli/version_test.go

@@ -217,7 +217,7 @@ func TestOutputPrettyVersionInfo(t *testing.T) {
 		{
 			name:                  "mesh versions with no remote version info",
 			remoteVersionInfoList: nil,
-			expected:              "\nMESH NAME\tMESH NAMESPACE\tVERSION\tGIT COMMIT\tBUILD DATE\n",
+			expected:              "No meshes in the cluster\n",
 		},
 	}