Add a builder method to customize where logs are stored

bindings/ldk_node.udl

@@ -4,6 +4,7 @@ namespace ldk_node {
 
 dictionary Config {
 	string storage_dir_path = "/tmp/ldk_node/";
+	string? log_dir_path = null;
 	Network network = "Bitcoin";
 	NetAddress? listening_address = null;
 	u32 default_cltv_expiry_delta = 144;

src/builder.rs

@@ -202,6 +202,12 @@ impl NodeBuilder {
 		self
 	}
 
+	/// Sets the log dir path if logs need to live separate from the storage directory path.
+	pub fn set_log_dir_path(&mut self, log_dir_path: String) -> &mut Self {
+		self.config.log_dir_path = Some(log_dir_path);
+		self
+	}
+
 	/// Sets the Bitcoin network used.
 	pub fn set_network(&mut self, network: Network) -> &mut Self {
 		self.config.network = network;
@@ -329,6 +335,11 @@ impl ArcedNodeBuilder {
 		self.inner.write().unwrap().set_storage_dir_path(storage_dir_path);
 	}
 
+	/// Sets the log dir path if logs need to live separate from the storage directory path.
+	pub fn set_log_dir_path(&self, log_dir_path: String) {
+		self.inner.write().unwrap().set_log_dir_path(log_dir_path);
+	}
+
 	/// Sets the Bitcoin network used.
 	pub fn set_network(&self, network: Network) {
 		self.inner.write().unwrap().set_network(network);
@@ -377,14 +388,14 @@ fn build_with_store_internal<K: KVStore + Sync + Send + 'static>(
 	let bdk_data_dir = format!("{}/bdk", config.storage_dir_path);
 	fs::create_dir_all(bdk_data_dir.clone()).map_err(|_| BuildError::StoragePathAccessFailed)?;
 
+	let log_dir = match &config.log_dir_path {
+		Some(log_dir) => String::from(log_dir),
+		None => config.storage_dir_path.clone() + "/logs",
+	};
+
 	// Initialize the Logger
-	let log_file_path = format!(
-		"{}/logs/ldk_node_{}.log",
-		config.storage_dir_path,
-		chrono::offset::Local::now().format("%Y_%m_%d")
-	);
 	let logger = Arc::new(
-		FilesystemLogger::new(log_file_path.clone(), config.log_level)
+		FilesystemLogger::new(log_dir, config.log_level)
 			.map_err(|_| BuildError::LoggerSetupFailed)?,
 	);
 

src/lib.rs

@@ -198,21 +198,26 @@ const WALLET_KEYS_SEED_LEN: usize = 64;
 ///
 /// ### Defaults
 ///
-/// | Parameter                              | Value            |
-/// |----------------------------------------|------------------|
-/// | `storage_dir_path`                     | /tmp/ldk_node/   |
-/// | `network`                              | Bitcoin          |
-/// | `listening_address`                    | None             |
-/// | `default_cltv_expiry_delta`            | 144              |
-/// | `onchain_wallet_sync_interval_secs`    | 80               |
-/// | `wallet_sync_interval_secs`            | 30               |
-/// | `fee_rate_cache_update_interval_secs`  | 600              |
-/// | `trusted_peers_0conf`                  | []               |
-/// | `log_level`                            | Debug            |
+/// | Parameter                              | Value              |
+/// |----------------------------------------|--------------------|
+/// | `storage_dir_path`                     | /tmp/ldk_node/     |
+/// | `log_dir_path`                         | None               |
+/// | `network`                              | Bitcoin            |
+/// | `listening_address`                    | None               |
+/// | `default_cltv_expiry_delta`            | 144                |
+/// | `onchain_wallet_sync_interval_secs`    | 80                 |
+/// | `wallet_sync_interval_secs`            | 30                 |
+/// | `fee_rate_cache_update_interval_secs`  | 600                |
+/// | `trusted_peers_0conf`                  | []                 |
+/// | `log_level`                            | Debug              |
 ///
 pub struct Config {
 	/// The path where the underlying LDK and BDK persist their data.
 	pub storage_dir_path: String,
+	/// The path where logs are stored.
+	///
+	/// If set to `None`, logs can be found in the `logs` subdirectory in [`Config::storage_dir_path`].
+	pub log_dir_path: Option<String>,
 	/// The used Bitcoin network.
 	pub network: Network,
 	/// The IP address and TCP port the node will listen on.
@@ -247,6 +252,7 @@ impl Default for Config {
 	fn default() -> Self {
 		Self {
 			storage_dir_path: DEFAULT_STORAGE_DIR_PATH.to_string(),
+			log_dir_path: None,
 			network: DEFAULT_NETWORK,
 			listening_address: None,
 			default_cltv_expiry_delta: DEFAULT_CLTV_EXPIRY_DELTA,

src/logger.rs

@@ -16,26 +16,30 @@ pub(crate) struct FilesystemLogger {
 }
 
 impl FilesystemLogger {
-	pub(crate) fn new(file_path: String, level: Level) -> Result<Self, ()> {
-		if let Some(parent_dir) = Path::new(&file_path).parent() {
+	pub(crate) fn new(log_dir: String, level: Level) -> Result<Self, ()> {
+		let log_file_name =
+			format!("ldk_node_{}.log", chrono::offset::Local::now().format("%Y_%m_%d"));
+		let log_file_path = format!("{}/{}", log_dir, log_file_name);
+
+		if let Some(parent_dir) = Path::new(&log_file_path).parent() {
 			fs::create_dir_all(parent_dir).expect("Failed to create log parent directory");
 
 			// make sure the file exists, so that the symlink has something to point to.
 			fs::OpenOptions::new()
 				.create(true)
 				.append(true)
-				.open(file_path.clone())
+				.open(log_file_path.clone())
 				.map_err(|_| ())?;
 
 			// Create a symlink to the current log file, with prior cleanup
 			let log_file_symlink = parent_dir.join("ldk_node_latest.log");
 			if log_file_symlink.as_path().exists() && log_file_symlink.as_path().is_symlink() {
 				fs::remove_file(&log_file_symlink).map_err(|_| ())?;
 			}
-			symlink(&file_path, &log_file_symlink).map_err(|_| ())?;
+			symlink(&log_file_name, &log_file_symlink).map_err(|_| ())?;
 		}
 
-		Ok(Self { file_path, level })
+		Ok(Self { file_path: log_file_path, level })
 	}
 }
 impl Logger for FilesystemLogger {