casual-logger-on-rust

A logger that can be easily installed to simplify the sample program.
Ignore performance for ease of use.
It only supports writing to files and deleting old log files.

How to use

use casual_logger::{Level, Log, LOGGER};

fn main() {
    let remove_file_count = if let Ok(mut logger) = LOGGER.lock() {
        // Do not call 'Log::xxxxx()' in this code block.
        //
        // Set file name.
        //
        // All: 'tic-tac-toe-2020-07-11.log.toml'
        // Prefix: 'tic-tac-toe'
        // StartDate: '-2020-07-11' automatically.
        // Suffix: '.log' - To be safe, include a word that clearly states that you can delete the file.
        // Extention: '.toml'
        //
        // If you don't like the .toml extension, leave the suffix empty and the .log extension.
        logger.set_file_name("tic-tac-toe", ".log", ".toml");

        logger.retention_days = 2;
        // The higher this level, the more will be omitted.
        //
        // |<-- Low Level ------------------------- High level -->|
        // |<-- High priority ------------------- Low priority -->|
        // | Fatal < Error < Warn < Notice < Info < Debug < Trace |
        logger.level = Level::Trace;
        // Remove old log files. This is determined by the StartDate in the filename.
        logger.remove_old_logs()
    } else {
        0
    };
    Log::noticeln(&format!("Remove file count={}", remove_file_count));

    Log::infoln(
        "Hello, world!!
こんにちわ、世界！！",
    );

    if Log::enabled(Level::Info) {
        let x = 100; // Time-consuming preparation, here.
        Log::infoln(&format!("x is {}.", x));
    }

    Log::trace("A,");
    Log::traceln("B,");
    Log::debug("C,");
    Log::debugln("D,");
    Log::info("E,");
    Log::infoln("F,");
    Log::notice("G,");
    Log::noticeln("H,");
    Log::warn("I,");
    Log::warnln("J,");
    Log::error("K,");
    Log::errorln("L,");
    Log::fatal("M,");
    Log::fatalln("N!");
}