torrust_index_backend/bootstrap/
logging.rs

1//! Setup for the application logging.
2//!
3//! - `Off`
4//! - `Error`
5//! - `Warn`
6//! - `Info`
7//! - `Debug`
8//! - `Trace`
9use std::str::FromStr;
10use std::sync::Once;
11
12use log::{info, LevelFilter};
13
14static INIT: Once = Once::new();
15
16pub fn setup(log_level: &Option<String>) {
17    let level = config_level_or_default(log_level);
18
19    if level == log::LevelFilter::Off {
20        return;
21    }
22
23    INIT.call_once(|| {
24        stdout_config(level);
25    });
26}
27
28fn config_level_or_default(log_level: &Option<String>) -> LevelFilter {
29    match log_level {
30        None => log::LevelFilter::Info,
31        Some(level) => LevelFilter::from_str(level).unwrap(),
32    }
33}
34
35fn stdout_config(level: LevelFilter) {
36    if let Err(_err) = fern::Dispatch::new()
37        .format(|out, message, record| {
38            out.finish(format_args!(
39                "{} [{}][{}] {}",
40                chrono::Local::now().format("%+"),
41                record.target(),
42                record.level(),
43                message
44            ));
45        })
46        .level(level)
47        .chain(std::io::stdout())
48        .apply()
49    {
50        panic!("Failed to initialize logging.")
51    }
52
53    info!("logging initialized.");
54}