Refactor initializing tracing-subscriber

examples/error-handling-and-dependency-injection/src/main.rs

@@ -18,17 +18,15 @@ use axum::{
 use serde::{Deserialize, Serialize};
 use serde_json::json;
 use std::{net::SocketAddr, sync::Arc};
-use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};
 use uuid::Uuid;
 
 #[tokio::main]
 async fn main() {
-    tracing_subscriber::registry()
-        .with(tracing_subscriber::EnvFilter::new(
-            std::env::var("RUST_LOG")
+    tracing_subscriber::fmt()
+        .with_env_filter(
+            tracing_subscriber::EnvFilter::try_from_default_env()
                 .unwrap_or_else(|_| "example_error_handling_and_dependency_injection=debug".into()),
-        ))
-        .with(tracing_subscriber::fmt::layer())
+        )
         .init();
 
     // Inject a `UserRepo` into our handlers via a trait object. This could be