added cli options

relay.nix

@@ -0,0 +1,21 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+pkgs.rustPlatform.buildRustPackage {
+  pname = "relay";
+  version = "0.1.0";
+  src = ./.;
+
+  cargoLock = {
+    lockFile = ./Cargo.lock;
+  };
+
+  cargoBuildFlags = [ "-p" "relay" ];
+
+  nativeBuildInputs = [ pkgs.makeWrapper ];
+  buildInputs = [ pkgs.ghdl-llvm ];
+
+  postFixup = ''
+    wrapProgram $out/bin/relay \
+      --prefix PATH : ${pkgs.lib.makeBinPath [ pkgs.ghdl-llvm ]}
+  '';
+}

relay/src/local.rs

@@ -37,7 +37,7 @@ struct Handler {
 
 impl Handler {
 
-    fn local(socket: WebSocket, build: PathBuf, src: PathBuf) -> Self {
+    fn local(socket: WebSocket, build: PathBuf, src: PathBuf, refresh_time: Duration) -> Self {
         let (sender, receiver) = socket.split();
         Self {
             sender,
@@ -45,7 +45,7 @@ impl Handler {
             build_dir: build,
             src_dir: src,
             process: None,
-            refresh_time: Duration::from_millis(30),
+            refresh_time,
         }
     }
 
@@ -207,6 +207,6 @@ impl Handler {
     }
 }
 
-pub async fn ws_handler(socket: WebSocket) {
-    Handler::local(socket, "../target".into(), "../src".into()).run().await;
+pub async fn ws_handler(socket: WebSocket, refresh_time: Duration) {
+    Handler::local(socket, "../target".into(), "../src".into(), refresh_time).run().await;
 }

relay/src/main.rs

@@ -6,7 +6,10 @@ use axum::{
     routing::get,
 };
 use serde::{Deserialize, Serialize};
-use std::net::SocketAddr;
+use std::{
+    net::{IpAddr, SocketAddr},
+    time::Duration,
+};
 
 pub mod build;
 pub mod run;
@@ -39,8 +42,73 @@ async fn not_found() -> impl IntoResponse {
     (StatusCode::NOT_FOUND, "not found")
 }
 
+#[derive(Clone, Copy, Debug)]
+struct Config {
+    ip: IpAddr,
+    port: u16,
+    update_ms: u64,
+}
+
+impl Default for Config {
+    fn default() -> Self {
+        Self {
+            ip: IpAddr::from([127, 0, 0, 1]),
+            port: 8080,
+            update_ms: 30,
+        }
+    }
+}
+
+fn parse_config_from_args() -> Result<Config, String> {
+    let mut cfg = Config::default();
+    let mut args = std::env::args().skip(1);
+
+    while let Some(arg) = args.next() {
+        match arg.as_str() {
+            "--" => break,
+            "--ip" => {
+                let value = args.next().ok_or("missing value for --ip")?;
+                cfg.ip = value
+                    .parse::<IpAddr>()
+                    .map_err(|err| format!("invalid --ip `{value}`: {err}"))?;
+            }
+            "--port" => {
+                let value = args.next().ok_or("missing value for --port")?;
+                cfg.port = value
+                    .parse::<u16>()
+                    .map_err(|err| format!("invalid --port `{value}`: {err}"))?;
+            }
+            "--update-ms" => {
+                let value = args.next().ok_or("missing value for --update-ms")?;
+                cfg.update_ms = value
+                    .parse::<u64>()
+                    .map_err(|err| format!("invalid --update-ms `{value}`: {err}"))?;
+            }
+            "--help" | "-h" => {
+                return Err("usage: relay [--ip <ip>] [--port <port>] [--update-ms <ms>]".into());
+            }
+            _ => {
+                return Err(format!(
+                    "unknown argument `{arg}`\nusage: relay [--ip <ip>] [--port <port>] [--update-ms <ms>]"
+                ));
+            }
+        }
+    }
+
+    Ok(cfg)
+}
+
 #[tokio::main]
 async fn main() {
+    let cfg = match parse_config_from_args() {
+        Ok(cfg) => cfg,
+        Err(msg) => {
+            eprintln!("{msg}");
+            std::process::exit(2);
+        }
+    };
+
+    let update_interval = Duration::from_millis(cfg.update_ms);
     let app = Router::new()
         .route("/", get(serve_index))
         .route("/index.html", get(serve_index))
@@ -48,15 +116,34 @@ async fn main() {
         .route("/app.js", get(serve_app_js))
         .route(
             "/ws/remote",
-            get(|ws: WebSocketUpgrade| async move { ws.on_upgrade(local::ws_handler) }),
+            get(move |ws: WebSocketUpgrade| {
+                let update_interval = update_interval;
+                async move {
+                    ws.on_upgrade(move |socket| remote::ws_handler(socket, update_interval))
+                }
+            }),
         )
         .route(
             "/ws/local",
-            get(|ws: WebSocketUpgrade| async move { ws.on_upgrade(remote::ws_handler) }),
+            get(move |ws: WebSocketUpgrade| {
+                let update_interval = update_interval;
+                async move {
+                    ws.on_upgrade(move |socket| local::ws_handler(socket, update_interval))
+                }
+            }),
+        )
+        .route(
+            "/ws",
+            get(move |ws: WebSocketUpgrade| {
+                let update_interval = update_interval;
+                async move {
+                    ws.on_upgrade(move |socket| remote::ws_handler(socket, update_interval))
+                }
+            }),
         )
         .fallback(get(not_found));
 
-    let addr = SocketAddr::from(([127, 0, 0, 1], 8080));
+    let addr = SocketAddr::new(cfg.ip, cfg.port);
     println!("Open UI: http://{}/", addr);
 
     axum::serve(tokio::net::TcpListener::bind(addr).await.unwrap(), app)

relay/src/remote.rs

@@ -11,7 +11,7 @@ use tokio::{
 
 use crate::{ClientMsg, HResult, ServerMsg, build, run};
 
-pub async fn ws_handler(socket: WebSocket) {
+pub async fn ws_handler(socket: WebSocket, refresh_time: Duration) {
     let (mut sender, mut receiver) = socket.split();
 
     let files = if let Some(Ok(Message::Text(msg))) = receiver.next().await
@@ -113,7 +113,7 @@ pub async fn ws_handler(socket: WebSocket) {
                 }
                 _ = tokio::time::sleep_until(print_deadline) => {
                     use tokio::io::AsyncWriteExt;
-                    print_deadline += Duration::from_millis(30);
+                    print_deadline += refresh_time;
                     process.stdin.write_all("\n".as_bytes()).await?;
                 }
             }