rust-chg: upgrade to futures-0.3 based libraries

And do some trivial fixes:

 - BytesMut::put_u32_be() -> put_u32()
 - tokio_process -> tokio::process, CommandExt -> Command,
   spawn_async() -> spawn(), stdin() -> stdin
 - tokio_timer::sleep() -> tokio::time::delay_for()

Differential Revision: https://phab.mercurial-scm.org/D8441

rust/chg/Cargo.lock

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rust/chg/Cargo.toml

@@ -10,14 +10,16 edition = "2018"
 autobins = false
 
 [dependencies]
-bytes = "0.4"
-futures = "0.1"
+async-trait = "0.1"
+bytes = "0.5"
+futures = "0.3"
 libc = "0.2"
 log = { version = "0.4", features = ["std"] }
-tokio = "0.1"
-tokio-hglib = "0.2"
-tokio-process = "0.2.3"
-tokio-timer = "0.2"
+tokio-hglib = "0.3"
+
+[dependencies.tokio]
+version = "0.2"
+features = ["rt-core", "io-util", "time", "process", "macros"]
 
 [build-dependencies]
 cc = "1.0"

rust/chg/src/clientext.rs

@@ -99,7 +99,7 where
 
     fn set_umask(self, mask: u32) -> OneShotRequest<C> {
         let mut args = BytesMut::with_capacity(mem::size_of_val(&mask));
-        args.put_u32_be(mask);
+        args.put_u32(mask);
         OneShotRequest::start_with_args(self, b"setumask2", args)
     }
 

rust/chg/src/locator.rs

@@ -14,12 +14,12 use std::io;
 use std::os::unix::ffi::{OsStrExt, OsStringExt};
 use std::os::unix::fs::{DirBuilderExt, MetadataExt};
 use std::path::{Path, PathBuf};
-use std::process::{self, Command};
+use std::process;
 use std::time::Duration;
 use tokio::prelude::*;
+use tokio::process::{Child, Command};
+use tokio::time;
 use tokio_hglib::UnixClient;
-use tokio_process::{Child, CommandExt};
-use tokio_timer;
 
 use crate::clientext::ChgClientExt;
 use crate::message::{Instruction, ServerSpec};
@@ -236,7 +236,7 impl Locator {
             .env_clear()
             .envs(self.env_vars.iter().cloned())
             .env("CHGINTERNALMARK", "")
-            .spawn_async()
+            .spawn()
             .into_future()
             .and_then(|server| self.connect_spawned(server, sock_path))
             .and_then(|(loc, client, sock_path)| {
@@ -264,7 +264,7 impl Locator {
                     Ok(client) => Either::A(future::ok(Loop::Break((client, sock_path)))),
                     Err(_) => {
                         // try again with slight delay
-                        let fut = tokio_timer::sleep(Duration::from_millis(10))
+                        let fut = time::delay_for(Duration::from_millis(10))
                             .map(|()| Loop::Continue(sock_path))
                             .map_err(|err| io::Error::new(io::ErrorKind::Other, err));
                         Either::B(fut)

rust/chg/src/uihandler.rs

@@ -8,9 +8,9 use futures::Future;
 use std::io;
 use std::os::unix::io::AsRawFd;
 use std::os::unix::process::ExitStatusExt;
-use std::process::{Command, Stdio};
+use std::process::Stdio;
 use tokio;
-use tokio_process::{ChildStdin, CommandExt};
+use tokio::process::{ChildStdin, Command};
 
 use crate::message::CommandSpec;
 use crate::procutil;
@@ -47,10 +47,8 impl SystemHandler for ChgUiHandler {
     type RunSystemResult = Box<dyn Future<Item = (Self, i32), Error = io::Error> + Send>;
 
     fn spawn_pager(self, spec: CommandSpec) -> Self::SpawnPagerResult {
-        let mut pager = new_shell_command(&spec)
-            .stdin(Stdio::piped())
-            .spawn_async()?;
-        let pin = pager.stdin().take().unwrap();
+        let mut pager = new_shell_command(&spec).stdin(Stdio::piped()).spawn()?;
+        let pin = pager.stdin.take().unwrap();
         procutil::set_blocking_fd(pin.as_raw_fd())?;
         // TODO: if pager exits, notify the server with SIGPIPE immediately.
         // otherwise the server won't get SIGPIPE if it does not write
@@ -62,7 +60,7 impl SystemHandler for ChgUiHandler {
 
     fn run_system(self, spec: CommandSpec) -> Self::RunSystemResult {
         let fut = new_shell_command(&spec)
-            .spawn_async()
+            .spawn()
             .into_future()
             .flatten()
             .map(|status| {