Initialize the logger by calling `rustc_log::init_logger` with a configuration derived from an environment variable like `LOG`. This sets up `tracing-subscriber` to handle log output based on the filter rules you define.
How to Use tracing-subscriber for Log Output
Initialize the logger by calling rustc_log::init_logger with a configuration derived from an environment variable like LOG. This sets up tracing-subscriber to handle log output based on the filter rules you define.
use rustc_log::LoggerConfig;
fn main() {
rustc_log::init_logger(LoggerConfig::from_env("LOG")).unwrap();
// Your code here
}
Run your application with LOG=debug cargo run to see debug-level logs.
tracing-subscriber sets up a logging system that lets you control how much detail you see in your program's output. You define a rule (like 'show me everything' or 'only show errors') using an environment variable, and the system automatically formats and prints the logs. It's like turning a dimmer switch on a light to see exactly how bright you want the information to be.