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use flexi_logger::{DeferredNow, FlexiLoggerError, Logger};
use log::*;
use std::sync::atomic::{AtomicU32, Ordering};
// Produces
// 1 INFO [entry_numbers] first
// 2 WARN [entry_numbers] second
// 3 ERROR [entry_numbers] third
fn main() -> Result<(), FlexiLoggerError> {
Logger::try_with_str("info")?.format(my_format).start()?;
info!("first");
warn!("second");
error!("third");
Ok(())
}
pub fn my_format(
w: &mut dyn std::io::Write,
_now: &mut DeferredNow,
record: &Record,
) -> Result<(), std::io::Error> {
static LINE: AtomicU32 = AtomicU32::new(1);
write!(
w,
"{:>6} {} [{}] {}",
LINE.fetch_add(1, Ordering::Relaxed),
record.level(),
record.module_path().unwrap_or("<unnamed>"),
record.args()
)
}
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