func parseMode(flags *pflag.FlagSet, spec *api.ServiceSpec) error {
if flags.Changed("mode") {
mode, err := flags.GetString("mode")
if err != nil {
return err
}
switch mode {
case "global":
if spec.GetGlobal() == nil {
spec.Mode = &api.ServiceSpec_Global{
Global: &api.GlobalService{},
}
}
case "replicated":
if spec.GetReplicated() == nil {
spec.Mode = &api.ServiceSpec_Replicated{
Replicated: &api.ReplicatedService{},
}
}
}
}
if flags.Changed("replicas") {
if spec.GetReplicated() == nil {
return fmt.Errorf("--replicas can only be specified in --mode replicated")
}
replicas, err := flags.GetUint64("replicas")
if err != nil {
return err
}
spec.GetReplicated().Replicas = replicas
}
return nil
}
