1 use log::{debug, info, warn};
2
setup_logging() -> Result<(), Box<dyn std::error::Error>>3 fn setup_logging() -> Result<(), Box<dyn std::error::Error>> {
4 fern::Dispatch::new()
5 .level(log::LevelFilter::Debug)
6 .chain(fern::DateBased::new("program.log.", "%Y-%m-%d"))
7 .apply()?;
8
9 Ok(())
10 }
11
main()12 fn main() {
13 setup_logging().expect("failed to initialize logging.");
14
15 for i in 0..5 {
16 info!("executing section: {}", i);
17
18 debug!("section {} 1/4 complete.", i);
19
20 debug!("section {} 1/2 complete.", i);
21
22 debug!("section {} 3/4 complete.", i);
23
24 info!("section {} completed!", i);
25 }
26
27 warn!("AHHH something's on fire.");
28 }
29