Module env_logger

A simple logger that can be configured via environment variables.

• Crate ::env_logger.
• docs.rs
• crates.io
• GitHub

env_logger is a logging implementation for the log facade that filters log messages based on environment variables. It's the most commonly used logging backend in the Rust ecosystem, particularly for command-line applications.

By default, env_logger reads the RUST_LOG environment variable to determine which log messages to display. The format is target=level, where target can be a module path and level is one of error, warn, info, debug, or trace.

Examples

Initialize the logger at the start of your program:

use log::info;

fn main() {
    env_logger::init();

    info!("Starting application");
}