fix(utils/tracing): use correct formatting on Windows

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "quincy"
-version = "0.9.1"
+version = "0.9.2"
 authors = ["Jakub Kubík <[email protected]>"]
 license = "MIT"
 description = "QUIC-based VPN"
@@ -84,6 +84,11 @@ once_cell = "^1.17"
 [target.'cfg(not(target_env = "msvc"))'.dependencies]
 jemallocator = "0.5"
 
+# Windows formatting
+[target.'cfg(windows)'.dependencies]
+tracing-subscriber = { version = "^0.3.17", features = ["env-filter", "ansi"] }
+nu-ansi-term = "^0.50.0"
+
 [dev-dependencies]
 rstest = "^0.18.0"
 tracing-test = { version = "^0.2.4", features = ["no-env-filter"] }

src/utils/tracing.rs

@@ -1,15 +1,23 @@
 use tracing::Subscriber;
-use tracing_subscriber::layer::SubscriberExt;
+use tracing_subscriber::fmt::SubscriberBuilder;
 use tracing_subscriber::EnvFilter;
 
 /// Returns a new `tracing` subscriber with the specified log level.
 ///
 /// ### Arguments
 /// - `log_level` - the log level to use
 pub fn log_subscriber(log_level: &str) -> impl Subscriber {
-    let registry = tracing_subscriber::Registry::default();
-    let fmt_layer = tracing_subscriber::fmt::Layer::new();
+    // Enable ANSI color support on Windows.
+    #[cfg(windows)]
+    let with_ansi = nu_ansi_term::enable_ansi_support().is_ok();
+
+    #[cfg(not(windows))]
+    let with_ansi = false;
+
     let filter_layer = EnvFilter::try_new(log_level).unwrap();
 
-    registry.with(filter_layer).with(fmt_layer)
+    SubscriberBuilder::default()
+        .with_env_filter(filter_layer)
+        .with_ansi(with_ansi)
+        .finish()
 }