log2

log2 is an out-of-the-box logging library for Rust. It writes to stdout or to file asynchronousely, and automatically rotates based on file size.

Usage

Add dependency

cargo add log2

Log to stdout

use log2:*;

fn main() {
    log2::start();
    log2::set_level(level::Debug);

    trace!("send order request to server");
    debug!("receive order response");
    info!("order was executed");
    warn!("network speed is slow");
    error!("network connection as broken");
}

Output

Log to file

log2 with default file size 50MB, max file count 10, you can change as you like.

use log2::*;

fn main() {
    // configurable way: 
    // - log to file, file size: 100 MB, rotate: 20
    // - tee to stdout
    let _log2 = log2::open("log.txt").size(100*1024*1024).rotate(20).tee(true).start();

    // out-of-the-box way
    // let _log2 = log2::open("log.txt").start();

    trace!("send order request to server");
    debug!("receive order response");
    info!("order was executed");
    warn!("network speed is slow");
    error!("network connection as broken");
}

Output files

log.txt
log.1.txt
log.2.txt
log.3.txt
log.4.txt
log.5.txt
log.6.txt
log.7.txt
log.8.txt
log.9.txt