use tracing_filter::legacy::Filter;
fn main() {
let mut args = std::env::args();
match (args.next(), args.next(), args.next()) {
(_, Some(directive), None) => show_directive(&directive),
_ => eprintln!("Usage: cargo run --bin legacy <directive>"),
}
}
fn show_directive(spec: &str) {
let (filter, report) = Filter::parse(spec);
println!("\nFilter normalizes as:\n{}\n", filter);
if let Some(report) = report {
println!("Error: {:?}", report);
}
let env_filter = tracing_subscriber::filter::EnvFilter::new(spec);
println!("\nUpstream interprests it as:\n{:#?}\n", env_filter);
}