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// Copyright 2017 Parity Technologies (UK) Ltd.
// This file is part of Polkadot.
// Polkadot is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Polkadot is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Polkadot. If not, see <http://www.gnu.org/licenses/>.
//! Polkadot CLI
#![warn(missing_docs)]
use cli::{AbstractService, VersionInfo, TaskExecutor};
use futures::channel::oneshot;
use futures::{future, FutureExt};
use std::cell::RefCell;
// the regular polkadot worker simply does nothing until ctrl-c
struct Worker;
type Exit = future::Map<oneshot::Receiver<()>, fn(Result<(), oneshot::Canceled>) -> ()>;
fn into_exit(self) -> Self::Exit {
// can't use signal directly here because CtrlC takes only `Fn`.
let (exit_send, exit) = oneshot::channel();
let exit_send_cell = RefCell::new(Some(exit_send));
if let Some(exit_send) = exit_send_cell.try_borrow_mut().expect("signal handler not reentrant; qed").take() {
exit_send.send(()).expect("Error sending exit notification");
}
}).expect("Error setting Ctrl-C handler");
impl cli::Worker for Worker {
type Work = <Self as cli::IntoExit>::Exit;
fn work<S, SC, B, CE>(self, _: &S, _: TaskExecutor) -> Self::Work
where S: AbstractService<Block = service::Block, RuntimeApi = service::RuntimeApi,
Backend = B, SelectChain = SC,
NetworkSpecialization = service::PolkadotProtocol, CallExecutor = CE>,
SC: service::SelectChain<service::Block> + 'static,
B: service::Backend<service::Block, service::Blake2Hasher> + 'static,
CE: service::CallExecutor<service::Block, service::Blake2Hasher> + Clone + Send + Sync + 'static {
use cli::IntoExit;
self.into_exit()
fn main() -> Result<(), cli::error::Error> {
version: env!("CARGO_PKG_VERSION"),
executable_name: "polkadot",
author: "Parity Team <[email protected]>",
description: "Polkadot Relay-chain Client Node",
support_url: "https://github.com/paritytech/polkadot/issues/new",
cli::run(Worker, version)