Create the test function

crates/xtask/src/common/logs.rs

@@ -0,0 +1,18 @@
+use anyhow::Context;
+use std::io::LineWriter;
+use tracing_subscriber::{fmt::format::FmtSpan, layer::SubscriberExt, Layer};
+
+pub fn setup_logs(log_filter: &str) -> anyhow::Result<()> {
+    let filter: tracing_subscriber::filter::Targets =
+        log_filter.parse().context("invalid --log-filter")?;
+
+    let subscriber = tracing_subscriber::registry().with(
+        tracing_subscriber::fmt::layer()
+            .with_writer(|| LineWriter::new(std::io::stderr()))
+            .with_span_events(FmtSpan::NEW | FmtSpan::CLOSE)
+            .with_filter(filter),
+    );
+    tracing::subscriber::set_global_default(subscriber).context("could not setup logging")?;
+
+    Ok(())
+}

crates/xtask/src/common/mod.rs

@@ -1 +1,2 @@
 pub mod args;
+pub mod logs;