better logging handling

Cargo.lock

@@ -239,6 +239,12 @@ version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024"
 
+[[package]]
+name = "humantime"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a3a5bfb195931eeb336b2a7b4d761daec841b97f947d34394601737a7bba5e4"
+
 [[package]]
 name = "iana-time-zone"
 version = "0.1.60"
@@ -376,6 +382,7 @@ dependencies = [
  "chrono",
  "derive-new",
  "fern",
+ "humantime",
  "lazy_static",
  "log",
  "num_enum",

Cargo.toml

@@ -10,6 +10,7 @@ fern = "0.6"
 chrono = "0.4"
 log = "0.4"
 lazy_static = "1"
+humantime = "2"
 strum = { version = "0.26", features = ["derive"] }
 thiserror = "1"
 derive-new = "0.6"

src/logger.rs

@@ -1,17 +1,20 @@
 pub fn setup_logger() -> Result<(), fern::InitError> {
     fern::Dispatch::new()
-        .format(|out, message, record| {
+        .format(move |out, message, record| {
             out.finish(format_args!(
-                "{}[{}][{}] {}",
+                "[{}][{}][{}] {}",
-                chrono::Local::now().format("[%Y-%m-%d][%H:%M:%S]"),
+                humantime::format_rfc3339_millis(std::time::SystemTime::now()),
-                std::thread::current().name().expect("unnamed_thread"),
+                std::thread::current().name().unwrap_or("unnamed_thread"),
                 record.level(),
                 message
             ))
         })
         .level(log::LevelFilter::Debug)
         .chain(std::io::stdout())
-        .chain(fern::log_file("output.log")?)
+        .chain(fern::log_file(format!(
+            "output_{}.log",
+            humantime::format_rfc3339_seconds(std::time::SystemTime::now())
+        ))?)
         .apply()?;
     Ok(())
 }