commands.rs

trait Command {
    fn cli(&self) -> clap::App;

    fn execute(&self, config: &Config, args: &clap::Args);
}

trait WsCommand {
    fn cli(&self) -> clap::App;

    fn execute(&self, config: &Config, ws: &Workspace, args: &clap::Args);
}

impl<T: WsCommand> Command for T {
    fn cli(&self) -> clap::App {
        <T as WsCommand>::cli(self)
    }

    fn execute(&self, config: &Config, args: &clap::Args) {
        let ws = configure_ws(config, args);
        <T as WsCommand>::execute(self, config, ws, args)
    }
}