add async pty support about smol HOT 4 CLOSED

use portable_pty::{CommandBuilder, PtySize, PtySystemSelection};
use smol::Async;
use std::os::unix::io::AsRawFd;

fn main() {
    smol::run(async {
        let pty = PtySystemSelection::default().get().unwrap();

        let pair = pty
            .openpty(PtySize {
                rows: 24,
                cols: 80,
                pixel_width: 0,
                pixel_height: 0,
            })
            .unwrap();

        let cmd = CommandBuilder::new("whomai");
        let child = pair.slave.spawn_command(cmd).unwrap();
        drop(pair.slave);

        let mut reader = pair.master.try_clone_reader().unwrap();

        let mut reader = Async::new(reader).unwrap();
    });
}

pub trait MasterPty: std::io::Write {
    fn try_clone_reader(&self) -> Result<Box<dyn std::io::Read + Send>, Error>;
}

let mut reader = Async::new(reader).unwrap();

let mut reader = smol::reader(reader);