Comments (2)
from flexi_logger.
Sorry, not sure what you would want to have. Should every line optionally start with a line number?
The below example realizes a counter of the printed log-call within your own formatting function; this is not really a line number, because the printed log entries can contain line breaks themselves, and file rotation is not considered. On the other hand, doing a real line count would be expensive and quite redundant, since most text editors anyhow show the line number, at least optionally.
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()
)
}
from flexi_logger.
Related Issues (20)
- `DeferredNow::format_rfc3339` uses wrong timezone information
- FileLogWriter feature duplicate_to_stderr
- Keeping the logger handle alive HOT 1
- RUSTSEC-2021-0145 HOT 1
- Add support for capturing in tests HOT 1
- Get all log files include rolling
- Option to disable stderr/stdout output? HOT 4
- How to reopen the output file of a FileLogWriter after Logger::add_writer took it over? HOT 2
- Dynamic logging for parent/daemon HOT 1
- bufsize in std_writer::AsyncHandle HOT 2
- Missing `regex` and `log` dependencies - fail to compile HOT 1
- Method on LoggerHandle for manually forcing rotation?
- Remove remnants of the external_rotation feature
- Rotation may overwrite existing log file HOT 9
- Different logger instances per thread? HOT 1
- GlobError unwrap happens HOT 3
- [trc] Improve usability by getting values from `Logger` or integrating with it HOT 1
- `kv` support from log crate. Json formatter. HOT 2
- Does this library support multiple log files and/or multiple named/filtered outputs? HOT 1
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from flexi_logger.