feat(bin, tracing): allow multiple directives for journald/file logging (#2882)

bin/reth/src/cli.rs

@@ -10,17 +10,16 @@ use crate::{
 use clap::{ArgAction, Args, Parser, Subcommand};
 use reth_tracing::{
     tracing::{metadata::LevelFilter, Level, Subscriber},
-    tracing_subscriber::{filter::Directive, registry::LookupSpan},
+    tracing_subscriber::{filter::Directive, registry::LookupSpan, EnvFilter},
     BoxedLayer, FileWorkerGuard,
 };
-use std::str::FromStr;
 
 /// Parse CLI options, set up logging and run the chosen command.
 pub fn run() -> eyre::Result<()> {
     let opt = Cli::parse();
 
     let mut layers = vec![reth_tracing::stdout(opt.verbosity.directive())];
-    if let Some((layer, _guard)) = opt.logs.layer() {
+    if let Some((layer, _guard)) = opt.logs.layer()? {
         layers.push(layer);
     }
     reth_tracing::init(layers);
@@ -115,21 +114,20 @@ pub struct Logs {
 
 impl Logs {
     /// Builds a tracing layer from the current log options.
-    pub fn layer<S>(&self) -> Option<(BoxedLayer<S>, Option<FileWorkerGuard>)>
+    pub fn layer<S>(&self) -> eyre::Result<Option<(BoxedLayer<S>, Option<FileWorkerGuard>)>>
     where
         S: Subscriber,
         for<'a> S: LookupSpan<'a>,
     {
-        let directive = Directive::from_str(self.filter.as_str())
-            .unwrap_or_else(|_| Directive::from_str("debug").unwrap());
+        let filter = EnvFilter::builder().parse(&self.filter)?;
 
         if self.journald {
-            Some((reth_tracing::journald(directive).expect("Could not connect to journald"), None))
+            Ok(Some((reth_tracing::journald(filter).expect("Could not connect to journald"), None)))
         } else if self.persistent {
-            let (layer, guard) = reth_tracing::file(directive, &self.log_directory, "reth.log");
-            Some((layer, Some(guard)))
+            let (layer, guard) = reth_tracing::file(filter, &self.log_directory, "reth.log");
+            Ok(Some((layer, Some(guard))))
         } else {
-            None
+            Ok(None)
         }
     }
 }

crates/tracing/src/lib.rs

@@ -58,12 +58,12 @@ where
 
 /// Builds a new tracing layer that appends to a log file.
 ///
-/// The events are filtered by `directive`.
+/// The events are filtered by `filter`.
 ///
 /// The boxed layer and a guard is returned. When the guard is dropped the buffer for the log
 /// file is immediately flushed to disk. Any events after the guard is dropped may be missed.
 pub fn file<S>(
-    directive: impl Into<Directive>,
+    filter: EnvFilter,
     dir: impl AsRef<Path>,
     file_name: impl AsRef<Path>,
 ) -> (BoxedLayer<S>, tracing_appender::non_blocking::WorkerGuard)
@@ -76,7 +76,7 @@ where
     let layer = tracing_subscriber::fmt::layer()
         .with_ansi(false)
         .with_writer(writer)
-        .with_filter(EnvFilter::default().add_directive(directive.into()))
+        .with_filter(filter)
         .boxed();
 
     (layer, guard)
@@ -90,17 +90,15 @@ pub type FileWorkerGuard = tracing_appender::non_blocking::WorkerGuard;
 
 /// Builds a new tracing layer that writes events to journald.
 ///
-/// The events are filtered by `directive`.
+/// The events are filtered by `filter`.
 ///
 /// If the layer cannot connect to journald for any reason this function will return an error.
-pub fn journald<S>(directive: impl Into<Directive>) -> std::io::Result<BoxedLayer<S>>
+pub fn journald<S>(filter: EnvFilter) -> std::io::Result<BoxedLayer<S>>
 where
     S: Subscriber,
     for<'a> S: LookupSpan<'a>,
 {
-    Ok(tracing_journald::layer()?
-        .with_filter(EnvFilter::default().add_directive(directive.into()))
-        .boxed())
+    Ok(tracing_journald::layer()?.with_filter(filter).boxed())
 }
 
 /// Initializes a tracing subscriber for tests.