openethereum/parity/setup_log.rs

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// Copyright 2015, 2016 Ethcore (UK) Ltd.
// This file is part of Parity.
// Parity 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.
// Parity 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 Parity. If not, see <http://www.gnu.org/licenses/>.
use std::env;
use std::sync::Arc;
use std::fs::File;
use std::io::Write;
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use time;
use env_logger::LogBuilder;
use regex::Regex;
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use util::RotatingLogger;
use util::log::{Applyable, Colour};
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/// Sets up the logger
pub fn setup_log(init: &Option<String>, enable_color: bool, log_to_file: &Option<String>) -> Arc<RotatingLogger> {
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use rlog::*;
let mut levels = String::new();
let mut builder = LogBuilder::new();
// Disable ws info logging by default.
builder.filter(Some("ws"), LogLevelFilter::Warn);
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builder.filter(None, LogLevelFilter::Info);
if env::var("RUST_LOG").is_ok() {
let lvl = &env::var("RUST_LOG").unwrap();
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levels.push_str(lvl);
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levels.push_str(",");
builder.parse(lvl);
}
if let Some(ref s) = *init {
levels.push_str(s);
builder.parse(s);
}
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let logs = Arc::new(RotatingLogger::new(levels, enable_color));
let logger = logs.clone();
let maybe_file = log_to_file.as_ref().map(|f| File::create(f).unwrap_or_else(|_| die!("Cannot write to log file given: {}", f)));
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let format = move |record: &LogRecord| {
let timestamp = time::strftime("%Y-%m-%d %H:%M:%S %Z", &time::now()).unwrap();
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let format = if max_log_level() <= LogLevelFilter::Info {
format!("{}{}", timestamp.apply(Colour::Black.bold()), record.args())
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} else {
format!("{}{}:{}: {}", timestamp.apply(Colour::Black.bold()), record.level(), record.target(), record.args())
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};
let removed_color = kill_color(format.as_ref());
if let Some(mut file) = maybe_file.as_ref() {
// ignore errors - there's nothing we can do
let _ = file.write_all(removed_color.as_bytes());
let _ = file.write_all(b"\n");
}
logger.append(removed_color);
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format
};
builder.format(format);
builder.init().unwrap();
logs
}
fn kill_color(s: &str) -> String {
lazy_static! {
static ref RE: Regex = Regex::new("\x1b\\[[^m]+m").unwrap();
}
RE.replace_all(s, "")
}
#[test]
fn should_remove_colour() {
let before = "test";
let after = kill_color(&before.apply(Colour::Red.bold()));
assert_eq!(after, "test");
}
#[test]
fn should_remove_multiple_colour() {
let t = format!("{} {}", Colour::Red.bold().paint("test"), Colour::White.normal().paint("again"));
let after = kill_color(&t);
assert_eq!(after, "test again");
}