add engine and rpc client, archive old code

_archive/devtools/reloadd/bin/reloadd.rs

@@ -0,0 +1,97 @@
+use clap::{Parser};
+use notify::{RecursiveMode, Watcher, EventKind, recommended_watcher};
+use std::sync::{Arc, Mutex};
+use std::process::{Command, Child, Stdio};
+use tokio::net::TcpListener;
+use tokio::sync::broadcast;
+use tokio_tungstenite::accept_async;
+use futures_util::{SinkExt, StreamExt};
+
+#[derive(Parser, Debug)]
+#[command(author, version, about)]
+struct Args {
+    /// Paths to watch (like src/, templates/, scripts/)
+    #[arg(short, long, value_name = "PATH", num_args = 1.., required = true)]
+    watch: Vec<String>,
+
+    /// Command to run on change (like: -- run --example server)
+    #[arg(last = true)]
+    command: Vec<String>,
+}
+
+#[tokio::main]
+async fn main() {
+    let args = Args::parse();
+
+    let (tx, _) = broadcast::channel::<()>(10);
+    let tx_ws = tx.clone();
+    let server_process = Arc::new(Mutex::new(None::<Child>));
+
+    // Start WebSocket reload server
+    tokio::spawn(start_websocket_server(tx_ws.clone()));
+
+    // Start watching files and restarting command
+    let server_process_clone = Arc::clone(&server_process);
+    let watch_paths = args.watch.clone();
+    let cmd_args = args.command.clone();
+
+    std::thread::spawn(move || {
+        let mut watcher = recommended_watcher(move |res| {
+            if let Ok(event) = res {
+                if matches!(event.kind, EventKind::Modify(_) | EventKind::Create(_) | EventKind::Remove(_)) {
+                    println!("📦 Change detected, restarting...");
+
+                    // Kill previous process
+                    if let Some(mut child) = server_process_clone.lock().unwrap().take() {
+                        let _ = child.kill();
+                    }
+
+                    // Run new process
+                    let mut cmd = Command::new("cargo");
+                    cmd.args(&cmd_args);
+                    cmd.stdout(Stdio::inherit())
+                        .stderr(Stdio::inherit());
+                    let child = cmd.spawn().expect("Failed to spawn");
+
+                    *server_process_clone.lock().unwrap() = Some(child);
+
+                    // Notify browser
+                    let _ = tx.send(());
+                }
+            }
+        }).expect("watcher failed");
+
+        // Add watches
+        for path in &watch_paths {
+            watcher.watch(path, RecursiveMode::Recursive).unwrap();
+        }
+
+        loop {
+            std::thread::sleep(std::time::Duration::from_secs(3600));
+        }
+    });
+
+    println!("🔁 Watching paths: {:?}", args.watch);
+    println!("🌐 Connect browser to ws://localhost:35729");
+    loop {
+        tokio::time::sleep(tokio::time::Duration::from_secs(3600)).await;
+    }
+}
+
+async fn start_websocket_server(tx: broadcast::Sender<()>) {
+    let listener = TcpListener::bind("127.0.0.1:35729").await.unwrap();
+
+    while let Ok((stream, _)) = listener.accept().await {
+        let tx = tx.clone();
+        let mut rx = tx.subscribe();
+
+        tokio::spawn(async move {
+            let ws_stream = accept_async(stream).await.unwrap();
+            let (mut write, _) = ws_stream.split();
+
+            while rx.recv().await.is_ok() {
+                let _ = write.send(tokio_tungstenite::tungstenite::Message::Text("reload".into())).await;
+            }
+        });
+    }
+}