Log to file.

3 files changed, 60 insertions, 4 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 8b8b037..a80c2f6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -215,6 +215,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ccaeedb56da03b09f598226e25e80088cb4cd25f316e6e4df7d695f0feeb1403"
 
 [[package]]
+name = "crossbeam-channel"
+version = "0.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5aaa7bd5fb665c6864b5f963dd9097905c54125909c7aa94c9e18507cdbe6c53"
+dependencies = [
+ "cfg-if 1.0.0",
+ "crossbeam-utils 0.8.8",
+]
+
+[[package]]
 name = "crossbeam-epoch"
 version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -830,6 +840,7 @@ dependencies = [
  "teloxide",
  "tokio",
  "tracing",
+ "tracing-appender",
  "tracing-subscriber",
  "urandom",
  "warp",
@@ -1048,6 +1059,15 @@ dependencies = [
 ]
 
 [[package]]
+name = "num_threads"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aba1801fb138d8e85e11d0fc70baf4fe1cdfffda7c6cd34a854905df588e5ed0"
+dependencies = [
+ "libc",
+]
+
+[[package]]
 name = "once_cell"
 version = "1.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1874,6 +1894,17 @@ dependencies = [
 ]
 
 [[package]]
+name = "time"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c2702e08a7a860f005826c6815dcac101b19b5eb330c27fe4a5928fec1d20ddd"
+dependencies = [
+ "itoa",
+ "libc",
+ "num_threads",
+]
+
+[[package]]
 name = "tinyvec"
 version = "1.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1998,6 +2029,17 @@ dependencies = [
 ]
 
 [[package]]
+name = "tracing-appender"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09d48f71a791638519505cefafe162606f706c25592e4bde4d97600c0195312e"
+dependencies = [
+ "crossbeam-channel",
+ "time",
+ "tracing-subscriber",
+]
+
+[[package]]
 name = "tracing-attributes"
 version = "0.1.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/Cargo.toml b/Cargo.toml
index b2f3e27..aadae82 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,4 +17,5 @@ sqlx = { version = "0.5", features = [ "runtime-tokio-rustls", "sqlite" ] }
 urandom = "0.1.0"
 bs58 = "0.4.0"
 tracing = "0.1.32"
-tracing-subscriber = "0.3.9"
\ No newline at end of file
+tracing-subscriber = "0.3.9"
+tracing-appender = "0.2.2"
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index 1c1bd48..2c4263d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,4 @@
+use std::{io, path};
 use std::collections::HashMap;
 use std::convert::Infallible;
 use std::net::SocketAddr;
@@ -6,7 +7,8 @@ use std::str::FromStr;
 use teloxide::prelude2::*;
 use tracing::{debug, info, Level};
 use tracing::instrument;
-use tracing_subscriber::FmtSubscriber;
+use tracing_subscriber::fmt;
+use tracing_subscriber::layer::SubscriberExt;
 use warp::Filter;
 
 use config::Config;
@@ -50,9 +52,20 @@ async fn main() {
         }
     };
     eprintln!("Configuration is loaded. Set log level to {:?}.", log_level);
-    let subscriber = FmtSubscriber::builder()
+    let log_file_path = path::Path::new(&config.log_file);
+    let parent = log_file_path.parent().expect("Cannot extract parent.");
+    let filename = log_file_path.file_name().expect("Cannot extract file name.");
+    let (nb_file_appender, _guard) =
+        tracing_appender::non_blocking(
+            tracing_appender::rolling::never(parent, filename));
+    let subscriber = fmt::Subscriber::builder()
         .with_max_level(log_level)
-        .finish();
+        .with_writer(io::stderr) // log to stderr
+        .finish()
+        .with(fmt::Layer::default()
+            .with_writer(nb_file_appender) // log to file
+            .with_ansi(false)); // remove color control characters from log file
+
     tracing::subscriber::set_global_default(subscriber)
         .expect("Failed to set default subscriber");