Can't be used as a global flag, together with sub-commands.

[cardil]

When using sub-commands it would be good idea to set this flag globally.

#[derive(Parser, Debug)]
pub(crate) struct Args {
  #[clap(subcommand)]
  command: Commands,
  #[clap(flatten, global = true)]
  verbose: Verbosity,
}

Above produces an error:

error: methods are not allowed for flattened entry
  --> src/cli/args.rs:24:10
   |
24 |   #[clap(flatten, global = true)]
   | 

[epage]

Clap doesn't support attributes like this on a flatten because of the complexities of communicating between derives.

However, I've been meaning to hard code these flags to be global. #34 takes care of that.