feat: optionally relay logs to log

Author: enigbe

Cargo.toml

@@ -26,6 +26,7 @@ panic = 'abort'     # Abort on panic
 
 [features]
 default = []
+log_relay = ["log"]
 
 [dependencies]
 lightning = { version = "0.0.125", features = ["std"] }
@@ -75,7 +76,7 @@ libc = "0.2"
 uniffi = { version = "0.27.3", features = ["build"], optional = true }
 serde = { version = "1.0.210", default-features = false, features = ["std", "derive"] }
 serde_json = { version = "1.0.128", default-features = false, features = ["std"] }
-log = { version = "0.4.22" }
+log = { version = "0.4.22", optional = true}
 vss-client = "0.3"
 prost = { version = "0.11.6", default-features = false}
 

src/logger.rs

@@ -11,6 +11,7 @@ pub(crate) use lightning::{log_bytes, log_debug, log_error, log_info, log_trace}
 use lightning::util::logger::{Level, Record};
 
 use chrono::Utc;
+#[cfg(feature = "log_relay")]
 use log::{debug, error, info, trace, warn};
 
 use std::fmt::Debug;
@@ -34,6 +35,7 @@ pub enum Writer {
 	/// Writes logs to filesystem.
 	FileWriter { log_file: Mutex<fs::File> },
 	/// Relays logs to [`log`] logger.
+	#[cfg(feature = "log_relay")]
 	LogRelayWriter,
 	/// Forwards logs to a custom logger.
 	CustomWriter { inner: Arc<dyn LogWriter + Send + Sync> },
@@ -68,11 +70,17 @@ impl Writer {
 			},
 			// Initial logic for Writer that forwards to any logger that
 			// implements the `log` facade.
+			#[cfg(feature = "log_relay")]
 			WriterType::LogRelay(_log_relay_writer_config) => Ok(Writer::LogRelayWriter),
 			// Initial logic for Writer that forwards to any custom logger.
 			WriterType::Custom(custom_writer_config) => {
 				Ok(Writer::CustomWriter { inner: custom_writer_config.inner.clone() })
 			},
+			#[cfg(not(feature = "log_relay"))]
+			_ => {
+				eprintln!("ERROR: log_relay feature is not enabled");
+				Err(())
+			},
 		}
 	}
 }
@@ -85,6 +93,7 @@ impl LogWriter for Writer {
 				.expect("log file lock poisoned")
 				.write_all(message.as_bytes())
 				.expect("Failed to write to log file"),
+			#[cfg(feature = "log_relay")]
 			Writer::LogRelayWriter => match level {
 				Level::Gossip => {
 					// trace!(..) used for gossip logs here.