Polkadot CLI and logging initialization.

.editorconfig

@@ -0,0 +1,16 @@
+root = true
+[*]
+indent_style=tab
+indent_size=tab
+tab_width=4
+end_of_line=lf
+charset=utf-8
+trim_trailing_whitespace=true
+max_line_length=120
+insert_final_newline=true
+
+[*.yml]
+indent_style=space
+indent_size=2
+tab_width=8
+end_of_line=lf

.gitignore

@@ -1,2 +1,3 @@
 /target/
 **/*.rs.bk
+*.swp

Cargo.toml

@@ -1,6 +1,9 @@
 [package]
 name = "polkadot"
 version = "0.1.0"
-authors = ["Robert Habermeier <rphmeier@gmail.com>"]
+authors = ["Parity Team <admin@parity.io>"]
 
 [dependencies]
+polkadot-cli = { path = "cli" }
+
+[workspace]

cli/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "polkadot-cli"
+version = "0.1.0"
+authors = ["Parity Team <admin@parity.io>"]
+description = "Polkadot node implementation in Rust."
+
+[dependencies]
+clap = { version = "2.27", features = ["yaml"] }
+env_logger = "0.4"
+log = "0.3"

cli/src/cli.yml

@@ -0,0 +1,15 @@
+name: polkadot
+version: "1.0.0"
+author: "Parity Team <admin@polkadot.io>"
+about: Polkadot Node Rust Implementation
+args:
+  - log:
+      short: l
+      value_name: LOG_PATTERN
+      help: Sets a custom logging
+      takes_value: true
+subcommands:
+  - collator:
+      about: Run collator node
+  - validator:
+      about: Run validator node

cli/src/lib.rs

@@ -0,0 +1,61 @@
+// 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/>.
+
+extern crate env_logger;
+
+#[macro_use]
+extern crate clap;
+#[macro_use]
+extern crate log;
+
+pub fn main() {
+	let yaml = load_yaml!("./cli.yml");
+	let matches = clap::App::from_yaml(yaml).get_matches();
+
+	let log_pattern = matches.value_of("log").unwrap_or("");
+	init_logger(log_pattern);
+
+	if let Some(_) = matches.subcommand_matches("collator") {
+		info!("Starting collator.");
+		return;
+	}
+
+	if let Some(_) = matches.subcommand_matches("validator") {
+		info!("Starting validator.");
+		return;
+	}
+
+	println!("No command given.\n");
+	let _ = clap::App::from_yaml(yaml).print_long_help();
+}
+
+
+fn init_logger(pattern: &str) {
+	let mut builder = env_logger::LogBuilder::new();
+	// Disable info logging by default for some modules:
+	builder.filter(Some("hyper"), log::LogLevelFilter::Warn);
+	// Enable info for others.
+	builder.filter(None, log::LogLevelFilter::Info);
+
+	if let Ok(lvl) = std::env::var("RUST_LOG") {
+		builder.parse(&lvl);
+	}
+
+	builder.parse(pattern);
+
+
+	builder.init().expect("Logger initialized only once.");
+}

src/main.rs

@@ -14,6 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
 
+extern crate polkadot_cli;
+
 fn main() {
-    println!("Hello, world!");
-}
+	polkadot_cli::main();
+}