Should RegisterAlias work with BindPFlags?

[wz2b]

I am trying to have a nice YAML structure:

db:
   dsn: xyzzyxzyxyaya

but on the command line I'd prefer to just say --dsn rather than --db.dsn. To do this, I'm attempting to use RegisterAlias before calling BindPFlags and it doesn't seem to work. Should it?

	viper.RegisterAlias("dsn", "db.dsn")

	flag.String("dsn", "", "databse datasource name")
	pflag.CommandLine.AddGoFlagSet(flag.CommandLine)

	pflag.Parse()
	viper.BindPFlags(pflag.CommandLine)

What seems to happen is that viper.BindPFlags() just ignores the --dsn flag.

[wz2b]

I think I figured out how I'm supposed to do this. What I did was added a manual binding like this:

viper.BindPFlag("washnetdb.dsn", pflag.Lookup("dsn"))

I am not sure if I'm reading this correctly but it looks like the alias mechanism is only when you're looking things up for example using viper.GetString() ... in other words the aliases are applied at read time, not write time.