wisual_logger/
lib.rs

1use std::io::Write;
2use std::time::SystemTime;
3use std::{io, thread};
4
5use chrono::{DateTime, Utc};
6use env_logger::fmt::{Color, Formatter};
7use log::{Record, SetLoggerError};
8
9///! A log pretty printer that'll output in colors with thread name and pid
10pub struct LogFormatter;
11
12impl LogFormatter {
13    ///! Output log message with level, time, thread & pid
14    pub fn format(buf: &mut Formatter, record: &Record) -> io::Result<()> {
15        let metadata = record.metadata();
16        let target = metadata.target();
17        let time: DateTime<Utc> = SystemTime::now().into();
18        let time = time.format("%+");
19        let current_thread = thread::current();
20        let thread_name = current_thread
21            .name()
22            .map(|s| s.to_string())
23            .unwrap_or(format!("tid-{:?}", current_thread.id()));
24
25        let level_style = buf.default_styled_level(record.level());
26        let time_style = buf
27            .style()
28            .set_color(Color::Black)
29            .set_intense(true)
30            .clone();
31        let thread_name_style = buf
32            .style()
33            .set_color(Color::Magenta)
34            .set_intense(false)
35            .clone();
36        let args_style = buf
37            .style()
38            .set_color(Color::White)
39            .set_intense(true)
40            .clone();
41        let target_style = buf.style().set_color(Color::Cyan).set_intense(true).clone();
42
43        writeln!(
44            buf,
45            "{} [{}] ({}@{}) {}",
46            level_style,
47            time_style.value(time),
48            thread_name_style.value(thread_name),
49            target_style.value(target),
50            args_style.value(record.args())
51        )
52    }
53}
54
55///! Try to set-up the logger and return a result
56pub fn try_init_from_env() -> Result<(), SetLoggerError> {
57    env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("info"))
58        .format(LogFormatter::format)
59        .try_init()
60}
61
62///! Try to set-up the logger and ignore errors
63pub fn init_from_env() {
64    let _ = try_init_from_env();
65}
wisual_logger/lib.rs

wisual_logger/
lib.rs
