Add a feature to create automatically a random temporary directory for base path & remove Clone (#6221)

* Initial commit

Forked at: 4adac40c07
Parent branch: origin/master

* Add a feature to create automatically a temporary directory for base path

* doc fix and todos

* use parking_lot instead

* use refcell instead since we stay in the main thread

* remove Clone derives

* add test

* solving dependency issue

* clarifying doc

* conflict argument with base-path

* WIP

Forked at: 4adac40c07
Parent branch: origin/master

* revert dep deletion

* fixing test and making base_path optional

* hold basepath while the service is running

* fixes

* Update client/cli/src/params/shared_params.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Update client/service/Cargo.toml

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Update client/cli/src/commands/mod.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Update client/service/src/config.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* WIP

Forked at: 4adac40c07
Parent branch: origin/master

* improve doc

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

substrate/bin/node/cli/src/cli.rs

@@ -20,7 +20,7 @@ use sc_cli::RunCmd;
 use structopt::StructOpt;
 
 /// An overarching CLI command definition.
-#[derive(Clone, Debug, StructOpt)]
+#[derive(Debug, StructOpt)]
 pub struct Cli {
 	/// Possible subcommand with parameters.
 	#[structopt(subcommand)]
@@ -31,7 +31,7 @@ pub struct Cli {
 }
 
 /// Possible subcommands of the main binary.
-#[derive(Clone, Debug, StructOpt)]
+#[derive(Debug, StructOpt)]
 pub enum Subcommand {
 	/// A set of base subcommands handled by `sc_cli`.
 	#[structopt(flatten)]

substrate/bin/node/cli/tests/temp_base_path_works.rs

@@ -0,0 +1,72 @@
+// This file is part of Substrate.
+
+// Copyright (C) 2020 Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
+
+// This program 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.
+
+// This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
+
+#![cfg(unix)]
+
+use assert_cmd::cargo::cargo_bin;
+use nix::sys::signal::{kill, Signal::SIGINT};
+use nix::unistd::Pid;
+use regex::Regex;
+use std::convert::TryInto;
+use std::io::Read;
+use std::path::PathBuf;
+use std::process::{Command, Stdio};
+use std::thread;
+use std::time::Duration;
+
+pub mod common;
+
+#[test]
+fn temp_base_path_works() {
+	let mut cmd = Command::new(cargo_bin("substrate"));
+
+	let mut cmd = cmd
+		.args(&["--dev", "--tmp"])
+		.stdout(Stdio::piped())
+		.stderr(Stdio::piped())
+		.spawn()
+		.unwrap();
+
+	// Let it produce some blocks.
+	thread::sleep(Duration::from_secs(30));
+	assert!(
+		cmd.try_wait().unwrap().is_none(),
+		"the process should still be running"
+	);
+
+	// Stop the process
+	kill(Pid::from_raw(cmd.id().try_into().unwrap()), SIGINT).unwrap();
+	assert!(common::wait_for(&mut cmd, 40)
+		.map(|x| x.success())
+		.unwrap_or_default());
+
+	// Ensure the database has been deleted
+	let mut stderr = String::new();
+	cmd.stderr.unwrap().read_to_string(&mut stderr).unwrap();
+	let re = Regex::new(r"Database: .+ at (\S+)").unwrap();
+	let db_path = PathBuf::from(
+		re.captures(stderr.as_str())
+			.unwrap()
+			.get(1)
+			.unwrap()
+			.as_str()
+			.to_string(),
+	);
+
+	assert!(!db_path.exists());
+}