better logging handling

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]"),
-                std::thread::current().name().expect("unnamed_thread"),
+                "[{}][{}][{}] {}",
+                humantime::format_rfc3339_millis(std::time::SystemTime::now()),
+                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(())
 }