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Differential D8441

rust-chg: upgrade to futures-0.3 based libraries
ClosedPublic

Authored by yuja on Apr 16 2020, 8:29 AM.

Details

Reviewers
Alphare
Group Reviewers
hg-reviewers
Commits
rHGe9e44e61042b: rust-chg: upgrade to futures-0.3 based libraries
Summary

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()

Diff Detail

Repository
rHG Mercurial
Lint
Automatic diff as part of commit; lint not applicable.
Unit
Automatic diff as part of commit; unit tests not applicable.

Event Timeline

yuja created this revision.Apr 16 2020, 8:29 AM
Alphare accepted this revision.Apr 17 2020, 7:55 AM
yuja added a commit: rHGe9e44e61042b: rust-chg: upgrade to futures-0.3 based libraries.Apr 23 2020, 2:01 PM
This revision was not accepted when it landed; it landed in state Needs Review.
Closed by commit rHGe9e44e61042b: rust-chg: upgrade to futures-0.3 based libraries (authored by yuja). · Explain Why
This revision was automatically updated to reflect the committed changes.

Revision Contents
Changeset List

Diff 21185

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rust/chg/Cargo.toml

[package] [package]
name = "chg" name = "chg"
version = "0.1.0" version = "0.1.0"
authors = ["Yuya Nishihara <yuya@tcha.org>"] authors = ["Yuya Nishihara <yuya@tcha.org>"]
description = "Client for Mercurial command server with cHg extension" description = "Client for Mercurial command server with cHg extension"
license = "GPL-2.0+" license = "GPL-2.0+"
edition = "2018" edition = "2018"
# TODO: enable auto discovery # TODO: enable auto discovery
autobins = false autobins = false
[dependencies] [dependencies]
bytes = "0.4" async-trait = "0.1"
futures = "0.1" bytes = "0.5"
futures = "0.3"
libc = "0.2" libc = "0.2"
log = { version = "0.4", features = ["std"] } log = { version = "0.4", features = ["std"] }
tokio = "0.1" tokio-hglib = "0.3"
tokio-hglib = "0.2"
tokio-process = "0.2.3" [dependencies.tokio]
tokio-timer = "0.2" version = "0.2"
features = ["rt-core", "io-util", "time", "process", "macros"]
[build-dependencies] [build-dependencies]
cc = "1.0" cc = "1.0"

rust/chg/src/clientext.rs

} }
fn set_process_name(self, name: impl AsRef<OsStr>) -> OneShotRequest<C> { fn set_process_name(self, name: impl AsRef<OsStr>) -> OneShotRequest<C> {
OneShotRequest::start_with_args(self, b"setprocname", name.as_ref().as_bytes()) OneShotRequest::start_with_args(self, b"setprocname", name.as_ref().as_bytes())
} }
fn set_umask(self, mask: u32) -> OneShotRequest<C> { fn set_umask(self, mask: u32) -> OneShotRequest<C> {
let mut args = BytesMut::with_capacity(mem::size_of_val(&mask)); 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) OneShotRequest::start_with_args(self, b"setumask2", args)
} }
fn run_command_chg<H>( fn run_command_chg<H>(
self, self,
handler: H, handler: H,
args: impl IntoIterator<Item = impl AsRef<OsStr>>, args: impl IntoIterator<Item = impl AsRef<OsStr>>,
) -> ChgRunCommand<C, H> ) -> ChgRunCommand<C, H>

rust/chg/src/locator.rs

// Copyright 2011, 2018 Yuya Nishihara <yuya@tcha.org> // Copyright 2011, 2018 Yuya Nishihara <yuya@tcha.org>
// //
// This software may be used and distributed according to the terms of the // This software may be used and distributed according to the terms of the
// GNU General Public License version 2 or any later version. // GNU General Public License version 2 or any later version.
//! Utility for locating command-server process. //! Utility for locating command-server process.
use futures::future::{self, Either, Loop}; use futures::future::{self, Either, Loop};
use log::debug; use log::debug;
use std::env; use std::env;
use std::ffi::{OsStr, OsString}; use std::ffi::{OsStr, OsString};
use std::fs::{self, DirBuilder}; use std::fs::{self, DirBuilder};
use std::io; use std::io;
use std::os::unix::ffi::{OsStrExt, OsStringExt}; use std::os::unix::ffi::{OsStrExt, OsStringExt};
use std::os::unix::fs::{DirBuilderExt, MetadataExt}; use std::os::unix::fs::{DirBuilderExt, MetadataExt};
use std::path::{Path, PathBuf}; use std::path::{Path, PathBuf};
use std::process::{self, Command}; use std::process;
use std::time::Duration; use std::time::Duration;
use tokio::prelude::*; use tokio::prelude::*;
use tokio::process::{Child, Command};
use tokio::time;
use tokio_hglib::UnixClient; use tokio_hglib::UnixClient;
use tokio_process::{Child, CommandExt};
use tokio_timer;
use crate::clientext::ChgClientExt; use crate::clientext::ChgClientExt;
use crate::message::{Instruction, ServerSpec}; use crate::message::{Instruction, ServerSpec};
use crate::procutil; use crate::procutil;
const REQUIRED_SERVER_CAPABILITIES: &[&str] = &[ const REQUIRED_SERVER_CAPABILITIES: &[&str] = &[
"attachio", "attachio",
"chdir", "chdir",
.arg(&sock_path) .arg(&sock_path)
.arg("--daemon-postexec") .arg("--daemon-postexec")
.arg("chdir:/") .arg("chdir:/")
.args(&self.hg_early_args) .args(&self.hg_early_args)
.current_dir(&self.current_dir) .current_dir(&self.current_dir)
.env_clear() .env_clear()
.envs(self.env_vars.iter().cloned()) .envs(self.env_vars.iter().cloned())
.env("CHGINTERNALMARK", "") .env("CHGINTERNALMARK", "")
.spawn_async() .spawn()
.into_future() .into_future()
.and_then(|server| self.connect_spawned(server, sock_path)) .and_then(|server| self.connect_spawned(server, sock_path))
.and_then(|(loc, client, sock_path)| { .and_then(|(loc, client, sock_path)| {
debug!( debug!(
"rename {} to {}", "rename {} to {}",
sock_path.display(), sock_path.display(),
loc.base_sock_path.display() loc.base_sock_path.display()
); );
) -> impl Future<Item = (Self, UnixClient, PathBuf), Error = io::Error> { ) -> impl Future<Item = (Self, UnixClient, PathBuf), Error = io::Error> {
debug!("try connect to {} repeatedly", sock_path.display()); debug!("try connect to {} repeatedly", sock_path.display());
let connect = future::loop_fn(sock_path, |sock_path| { let connect = future::loop_fn(sock_path, |sock_path| {
UnixClient::connect(sock_path.clone()).then(|res| { UnixClient::connect(sock_path.clone()).then(|res| {
match res { match res {
Ok(client) => Either::A(future::ok(Loop::Break((client, sock_path)))), Ok(client) => Either::A(future::ok(Loop::Break((client, sock_path)))),
Err(_) => { Err(_) => {
// try again with slight delay // 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(|()| Loop::Continue(sock_path))
.map_err(|err| io::Error::new(io::ErrorKind::Other, err)); .map_err(|err| io::Error::new(io::ErrorKind::Other, err));
Either::B(fut) Either::B(fut)
} }
} }
}) })
}); });

rust/chg/src/uihandler.rs

// Copyright 2018 Yuya Nishihara <yuya@tcha.org> // Copyright 2018 Yuya Nishihara <yuya@tcha.org>
// //
// This software may be used and distributed according to the terms of the // This software may be used and distributed according to the terms of the
// GNU General Public License version 2 or any later version. // GNU General Public License version 2 or any later version.
use futures::future::IntoFuture; use futures::future::IntoFuture;
use futures::Future; use futures::Future;
use std::io; use std::io;
use std::os::unix::io::AsRawFd; use std::os::unix::io::AsRawFd;
use std::os::unix::process::ExitStatusExt; use std::os::unix::process::ExitStatusExt;
use std::process::{Command, Stdio}; use std::process::Stdio;
use tokio; use tokio;
use tokio_process::{ChildStdin, CommandExt}; use tokio::process::{ChildStdin, Command};
use crate::message::CommandSpec; use crate::message::CommandSpec;
use crate::procutil; use crate::procutil;
/// Callback to process shell command requests received from server. /// Callback to process shell command requests received from server.
pub trait SystemHandler: Sized { pub trait SystemHandler: Sized {
type PagerStdin: AsRawFd; type PagerStdin: AsRawFd;
type SpawnPagerResult: IntoFuture<Item = (Self, Self::PagerStdin), Error = io::Error>; type SpawnPagerResult: IntoFuture<Item = (Self, Self::PagerStdin), Error = io::Error>;
} }
impl SystemHandler for ChgUiHandler { impl SystemHandler for ChgUiHandler {
type PagerStdin = ChildStdin; type PagerStdin = ChildStdin;
type SpawnPagerResult = io::Result<(Self, Self::PagerStdin)>; type SpawnPagerResult = io::Result<(Self, Self::PagerStdin)>;
type RunSystemResult = Box<dyn Future<Item = (Self, i32), Error = io::Error> + Send>; type RunSystemResult = Box<dyn Future<Item = (Self, i32), Error = io::Error> + Send>;
fn spawn_pager(self, spec: CommandSpec) -> Self::SpawnPagerResult { fn spawn_pager(self, spec: CommandSpec) -> Self::SpawnPagerResult {
let mut pager = new_shell_command(&spec) let mut pager = new_shell_command(&spec).stdin(Stdio::piped()).spawn()?;
.stdin(Stdio::piped()) let pin = pager.stdin.take().unwrap();
.spawn_async()?;
let pin = pager.stdin().take().unwrap();
procutil::set_blocking_fd(pin.as_raw_fd())?; procutil::set_blocking_fd(pin.as_raw_fd())?;
// TODO: if pager exits, notify the server with SIGPIPE immediately. // TODO: if pager exits, notify the server with SIGPIPE immediately.
// otherwise the server won't get SIGPIPE if it does not write // otherwise the server won't get SIGPIPE if it does not write
// anything. (issue5278) // anything. (issue5278)
// kill(peerpid, SIGPIPE); // kill(peerpid, SIGPIPE);
tokio::spawn(pager.map(|_| ()).map_err(|_| ())); // just ignore errors tokio::spawn(pager.map(|_| ()).map_err(|_| ())); // just ignore errors
Ok((self, pin)) Ok((self, pin))
} }
fn run_system(self, spec: CommandSpec) -> Self::RunSystemResult { fn run_system(self, spec: CommandSpec) -> Self::RunSystemResult {
let fut = new_shell_command(&spec) let fut = new_shell_command(&spec)
.spawn_async() .spawn()
.into_future() .into_future()
.flatten() .flatten()
.map(|status| { .map(|status| {
let code = status let code = status
.code() .code()
.or_else(|| status.signal().map(|n| -n)) .or_else(|| status.signal().map(|n| -n))
.expect("either exit code or signal should be set"); .expect("either exit code or signal should be set");
(self, code) (self, code)