rust/chg/src/lib.rs

rust-chg: reimplement run_command operation as async function

The crafted state machine is no longer needed thanks to async/await.
The state machine is basically rewritten as follows:

 - Ready(..) -> return ..
 - PollAgain(..) -> run .. and await
 - Err(..) -> return Err(..)

Differential Revision: https://phab.mercurial-scm.org/D8445

// Copyright 2018 Yuya Nishihara <[e-mail]>
//
// This software may be used and distributed according to the terms of the
// GNU General Public License version 2 or any later version.

mod attachio;
//mod clientext;
//pub mod locator;
pub mod message;
pub mod procutil;
mod runcommand;
mod uihandler;

//pub use clientext::ChgClientExt;
pub use uihandler::{ChgUiHandler, SystemHandler};