Integrates structured logging with tracing

Replaces existing `println!` statements with `tracing::info!` macros for improved observability and debuggability.

Configures `tracing-subscriber` to enable structured logging, allowing for flexible filtering via `RUST_LOG` and compact, human-readable output by default.

src/rustylee/Cargo.lock

@@ -2,6 +2,15 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "aho-corasick"
+version = "1.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ddd31a130427c27518df266943a5308ed92d4b226cc639f5a8f1002816174301"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "bitflags"
 version = "2.11.0"
@@ -52,12 +61,39 @@ dependencies = [
  "objc2",
 ]
 
+[[package]]
+name = "lazy_static"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
+
 [[package]]
 name = "libc"
 version = "0.2.180"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bcc35a38544a891a5f7c865aca548a982ccb3b8650a5b06d0fd33a10283c56fc"
 
+[[package]]
+name = "log"
+version = "0.4.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
+
+[[package]]
+name = "matchers"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d1525a2a28c7f4fa0fc98bb91ae755d1e2d1505079e05539e35bc876b5d65ae9"
+dependencies = [
+ "regex-automata",
+]
+
+[[package]]
+name = "memchr"
+version = "2.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
+
 [[package]]
 name = "nix"
 version = "0.31.1"
@@ -70,6 +106,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "nu-ansi-term"
+version = "0.50.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7957b9740744892f114936ab4a57b3f487491bbeafaf8083688b16841a4240e5"
+dependencies = [
+ "windows-sys",
+]
+
 [[package]]
 name = "objc2"
 version = "0.6.3"
@@ -85,13 +130,170 @@ version = "4.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ef25abbcd74fb2609453eb695bd2f860d389e457f67dc17cafc8b8cbc89d0c33"
 
+[[package]]
+name = "once_cell"
+version = "1.21.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
+
+[[package]]
+name = "pin-project-lite"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b3cff922bd51709b605d9ead9aa71031d81447142d828eb4a6eba76fe619f9b"
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.106"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8fd00f0bb2e90d81d1044c2b32617f68fcb9fa3bb7640c23e9c748e53fb30934"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "21b2ebcf727b7760c461f091f9f0f539b77b8e87f2fd88131e7f1b433b3cece4"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "regex-automata"
+version = "0.4.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e1dd4122fc1595e8162618945476892eefca7b88c52820e74af6262213cae8f"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.8.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc897dd8d9e8bd1ed8cdad82b5966c3e0ecae09fb1907d58efaa013543185d0a"
+
 [[package]]
 name = "rustylee"
 version = "0.1.0"
 dependencies = [
  "ctrlc",
+ "tracing",
+ "tracing-subscriber",
 ]
 
+[[package]]
+name = "sharded-slab"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f40ca3c46823713e0d4209592e8d6e826aa57e928f09752619fc696c499637f6"
+dependencies = [
+ "lazy_static",
+]
+
+[[package]]
+name = "smallvec"
+version = "1.15.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "67b1b7a3b5fe4f1376887184045fcf45c69e92af734b7aaddc05fb777b6fbd03"
+
+[[package]]
+name = "syn"
+version = "2.0.117"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e665b8803e7b1d2a727f4023456bbbbe74da67099c585258af0ad9c5013b9b99"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "thread_local"
+version = "1.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f60246a4944f24f6e018aa17cdeffb7818b76356965d03b07d6a9886e8962185"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "tracing"
+version = "0.1.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "63e71662fa4b2a2c3a26f570f037eb95bb1f85397f3cd8076caed2f026a6d100"
+dependencies = [
+ "pin-project-lite",
+ "tracing-attributes",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-attributes"
+version = "0.1.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7490cfa5ec963746568740651ac6781f701c9c5ea257c58e057f3ba8cf69e8da"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "tracing-core"
+version = "0.1.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db97caf9d906fbde555dd62fa95ddba9eecfd14cb388e4f491a66d74cd5fb79a"
+dependencies = [
+ "once_cell",
+ "valuable",
+]
+
+[[package]]
+name = "tracing-log"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee855f1f400bd0e5c02d150ae5de3840039a3f54b025156404e34c23c03f47c3"
+dependencies = [
+ "log",
+ "once_cell",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-subscriber"
+version = "0.3.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f30143827ddab0d256fd843b7a66d164e9f271cfa0dde49142c5ca0ca291f1e"
+dependencies = [
+ "matchers",
+ "nu-ansi-term",
+ "once_cell",
+ "regex-automata",
+ "sharded-slab",
+ "smallvec",
+ "thread_local",
+ "tracing",
+ "tracing-core",
+ "tracing-log",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"
+
+[[package]]
+name = "valuable"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba73ea9cf16a25df0c8caa16c51acb937d5712a8429db78a3ee29d5dcacd3a65"
+
 [[package]]
 name = "windows-link"
 version = "0.2.1"

src/rustylee/Cargo.toml

@@ -5,3 +5,5 @@ edition = "2024"
 
 [dependencies]
 ctrlc = "3.5.2"
+tracing = "0.1"
+tracing-subscriber = { version = "0.3.22", features = ["env-filter", "fmt"] }

src/rustylee/src/brain/mod.rs

@@ -1,7 +1,7 @@
-//src/brain/mod.rs
 pub mod state;
 pub use self::state::State;
-use std::thread::{self, JoinHandle};
+use tracing::info;
+use std::thread::JoinHandle;
 
 
 pub struct Brain {
@@ -33,7 +33,7 @@ impl Brain {
                 // Logic will go here eventually
             }
             State::Stopping => {
-                println!("Brain: Waiting for all threads to join...");
+                info!("Brain: Waiting for all threads to join...");
                 while let Some(handle) = self.device_threads.pop() {
                     let _ = handle.join();
                 }

src/rustylee/src/brain/state.rs

@@ -1,4 +1,3 @@
-//src/brain/state.rs
 #[derive(PartialEq, Debug, Clone, Copy)]
 pub enum State {
     Starting,

src/rustylee/src/main.rs

@@ -1,29 +1,24 @@
 mod brain;
 use brain::{Brain, State};
+use tracing::info;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Arc;
 use std::sync::mpsc::{self, Receiver, Sender};
 use std::{thread, time::Duration};
 
 fn main() {
-    // We wrap the Brain in an Arc + Mutex so the Signal Handler can access it
-    // though for simple flag-setting, an Atomic works too.
-    // Here we'll use a simple shared flag to tell the Brain to stop.
     let shutdown_requested = Arc::new(AtomicBool::new(false));
     let s = shutdown_requested.clone();
 
-    // 1. Signal Handling
+    setup_logging();
-    // By default, in Rust/Unix, signals are delivered to the process.
+
-    // Setting the handler here ensures the main thread catches it.
     ctrlc::set_handler(move || {
-        println!("\n[Signal] Shutdown signal caught!");
+        info!("[Signal] Shutdown signal caught!");
         s.store(true, Ordering::SeqCst);
     }).expect("Error setting signal handler");
 
     let mut robot_brain = Brain::new();
 
-    // 2. The Watchdog Loop
-    // This loop runs until the Brain reaches the terminal 'Stopped' state
     while robot_brain.state != State::Stopped {
 
         // If the signal handler tripped the flag, tell the brain to stop
@@ -34,9 +29,23 @@ fn main() {
         // Run one "tick" of brain logic
         robot_brain.update();
 
-        println!("Main Loop: I'm alive! State: {:?}", robot_brain.state);
+        info!("Main Loop: I'm alive! State: {:?}", robot_brain.state);
         thread::sleep(Duration::from_millis(500));
     }
 
-    println!("Main Loop: Brain has Stopped. Exiting cleanly.");
+    info!("Main Loop: Brain has Stopped. Exiting cleanly.");
+}
+
+fn setup_logging() {
+    use tracing_subscriber::{fmt, prelude::*, EnvFilter};
+
+    let console_layer = fmt::layer()
+        .with_target(false)
+        .with_thread_ids(false)
+        .compact();
+
+    tracing_subscriber::registry()
+        .with(EnvFilter::try_from_default_env().unwrap_or_else(|_| EnvFilter::new("info")))
+        .with(console_layer)
+        .init();
 }