Set up tracing subscriber on TestFramework init

Cargo.toml

@@ -20,6 +20,8 @@ tempfile = "3.8"
 tokio = { version = "1.39", features = ["full"] }
 toml = "0.8.0"
 tracing = { version = "0.1.40", default-features = false }
+tracing-subscriber = { version = "0.3.17", features = ["env-filter", "json", "fmt"] }
+log-panics = { version = "2", features = ["with-backtrace"] }
 
 # Citrea dependencies
 sov-ledger-rpc = { git = "https://github.com/chainwayxyz/citrea", rev = "82bf52d", default-features = false, features = ["client"] }

src/batch_prover.rs

@@ -2,7 +2,7 @@ use std::time::SystemTime;
 
 use anyhow::bail;
 use tokio::time::{sleep, Duration};
-use tracing::debug;
+use tracing::trace;
 
 use super::{config::FullBatchProverConfig, Result};
 use crate::node::Node;
@@ -14,7 +14,7 @@ impl BatchProver {
         let start = SystemTime::now();
         let timeout = timeout.unwrap_or(Duration::from_secs(600));
         loop {
-            debug!("Waiting for batch prover height {}", height);
+            trace!("Waiting for batch prover height {}", height);
             let latest_block = self.client.ledger_get_last_scanned_l1_height().await?;
 
             if latest_block >= height {

src/framework.rs

@@ -1,4 +1,7 @@
-use std::{future::Future, sync::Arc};
+use std::{
+    future::Future,
+    sync::{Arc, Once},
+};
 
 use bitcoincore_rpc::RpcApi;
 use tracing::{debug, info};
@@ -53,6 +56,8 @@ async fn create_optional<T>(pred: bool, f: impl Future<Output = Result<T>>) -> R
 
 impl TestFramework {
     pub async fn new(config: TestConfig) -> Result<Self> {
+        setup_logging();
+
         anyhow::ensure!(
             config.test_case.n_nodes > 0,
             "At least one bitcoin node has to be running"
@@ -219,3 +224,31 @@ impl TestFramework {
         Ok(())
     }
 }
+
+use tracing_subscriber::layer::SubscriberExt;
+use tracing_subscriber::util::SubscriberInitExt;
+use tracing_subscriber::{fmt, EnvFilter};
+
+static INIT: Once = Once::new();
+
+fn setup_logging() {
+    INIT.call_once(|| {
+        let env_filter = EnvFilter::try_from_default_env()
+            .or_else(|_| EnvFilter::try_new("citrea_e2e=info"))
+            .unwrap();
+
+        if std::env::var("JSON_LOGS").is_ok() {
+            tracing_subscriber::registry()
+                .with(fmt::layer().json())
+                .with(env_filter)
+                .init();
+        } else {
+            tracing_subscriber::registry()
+                .with(fmt::layer())
+                .with(env_filter)
+                .init();
+        }
+
+        log_panics::init();
+    });
+}