moon-mud/src/logger.rs

pub use log::{LevelFilter, trace, debug, info, warn, error};

use chrono::Local;
use std::fs::OpenOptions;
use std::io::Write;
use std::path;

use crate::fs_util::{dir_exists, mkdir as create_dir};

/// Must be done before any log macros can work
///
/// data/logs/moonmud-MM-DD-YYYY.log
pub fn init_logging(level: LevelFilter) -> bool {
    let f = String::from("data/logs");
    if !dir_exists(&f) {
        if !create_dir(&f) {
            return false;
        }
    }
    let mut pth = path::PathBuf::new();
    pth.push(f);
    let log_filename = format!("moonmud-{0}.log", Local::now().format("%m-%d-%Y"));
    pth.push(log_filename);
    let target = Box::new(
        OpenOptions::new()
            .write(true)
            .append(true)
            .create(true)
            .open(&pth)
            .expect(format!("Can't open log file (write/append/create): {}", &pth.as_path().to_string_lossy()).as_str()),
    );
    env_logger::Builder::new()
        .target(env_logger::Target::Pipe(target))
        .format(|buf, record| {
            writeln!(
                buf,
                "[{} {:5} {}:{}] {}",
                Local::now().format("%Y-%m-%d %H:%M:%S%.3f"),
                record.level(),
                record.file().unwrap_or("unknown"),
                record.line().unwrap_or(0),
                record.args()
            )
        })
        .filter(None, level)
        .init();
    return true;
}