Crate youlog

youlog

A thin logging implementation for Rust’s log facade.

This crate allows for providing custom functions to the logger.

Examples where this might be useful:

• Logging logic needs to be different across log levels
• Another application’s logger is being used like with godot-rust
• An existing crate is too opinionated in how it handles logging

Features

• Setting logging functions per log level
• Setting a logging function across all log levels
• Filtering logs per module/filter
• Initializing filters from an environment variable (RUST_LOG by default)

Example

use log::LevelFilter;
use youlog::Youlog;

Youlog::new()
    .global_level(LevelFilter::Info)
    .log_fn(LevelFilter::Info, |record| {
        println!("info {}", record.args().as_str().unwrap_or_default());
    })
    .raw_fn(|record| {
        println!("raw {}", record.args().as_str().unwrap_or_default());
    })
    .level("some_module", LevelFilter::Error)
    .init()
    .expect("unable to init logger");

log::info!("this is an info log!");

License

MPL-2.0

Filter implementation referenced from env_logger.

Structs

Youlog

A logger that accepts user functions. Filters are optional, and by default all logs are enabled. This allows the user functions to implement their own per-level filters.

Constants

DEFAULT_ENV

The default environment variable containing logging filters.