adding local support

relay/src/build.rs

@@ -1,92 +1,100 @@
-use std::{collections::HashMap, ops::Deref, path::{Path, PathBuf}};
-use tokio::{
-    process::{Child, Command},
+use std::{
+    collections::HashMap,
+    ops::Deref,
+    path::{Path, PathBuf},
 };
+use tokio::process::{Child, Command};
 
-async fn ensure_ok(child: Child) -> Result<(), Box<dyn std::error::Error + Send + Sync>>{
+async fn ensure_ok(child: Child) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
     let result = child.wait_with_output().await?;
-    if !result.status.success(){
-        return Err(format!("{}\n{}", String::from_utf8_lossy(&result.stdout), String::from_utf8_lossy(&result.stderr)))?
+    if !result.status.success() {
+        return Err(format!(
+            "{}\n{}",
+            String::from_utf8_lossy(&result.stdout),
+            String::from_utf8_lossy(&result.stderr)
+        ))?;
     }
     Ok(())
 }
 
 pub struct TempDir(PathBuf);
-impl Drop for TempDir{
+impl Drop for TempDir {
     fn drop(&mut self) {
         _ = std::fs::remove_dir_all(&self.0)
     }
 }
 
-impl Deref for TempDir{
+impl Deref for TempDir {
     type Target = PathBuf;
-    
+
     fn deref(&self) -> &Self::Target {
         &self.0
     }
 }
 
-impl AsRef<PathBuf> for TempDir{
+impl AsRef<PathBuf> for TempDir {
     fn as_ref(&self) -> &PathBuf {
         &self.0
     }
 }
-impl AsRef<Path> for TempDir{
+impl AsRef<Path> for TempDir {
     fn as_ref(&self) -> &Path {
         &self.0
     }
 }
 
+pub async fn build(
+    files: HashMap<String, String>,
+) -> Result<TempDir, Box<dyn std::error::Error + Send + Sync>> {
+    use std::hash::*;
+    let mut hasher = std::hash::DefaultHasher::default();
+    for (key, value) in &files {
+        key.hash(&mut hasher);
+        value.hash(&mut hasher);
+    }
+    let hash = hasher.finish();
 
-pub async fn build(files: HashMap<String, String>) -> Result<TempDir, Box<dyn std::error::Error + Send + Sync>>{
-        use std::hash::*;
-        let mut hasher = std::hash::DefaultHasher::default();
-        for (key, value) in &files{
-            key.hash(&mut hasher);
-            value.hash(&mut hasher);
-        }
-        let hash = hasher.finish();
+    let mut work_dir = std::env::temp_dir();
+    work_dir.push(format!("ghdl-relay-{hash:x?}"));
+    _ = std::fs::create_dir(&work_dir);
+    let work_dir = TempDir(work_dir);
 
-        let mut work_dir = std::env::temp_dir();
-        work_dir.push(format!("ghdl-relay-{hash:x?}"));
-        _ = std::fs::create_dir(&work_dir);
-        let work_dir = TempDir(work_dir);
+    for (name, contents) in &files {
+        let mut path = work_dir.clone();
+        path.push(name);
+        std::fs::write(path, contents)?;
+    }
 
+    let mut cmd = Command::new("ghdl");
+    cmd.kill_on_drop(true);
+    cmd.args(["-a", "-g", "--std=08"]);
+    for name in files.keys() {
+        let mut path = work_dir.clone();
+        path.push(name);
+        cmd.arg(path);
+    }
+    cmd.arg(std::fs::canonicalize("../rtl/tb.vhdl")?);
 
-        for (name, contents) in &files{
-            let mut path = work_dir.clone();
-            path.push(name);
-            std::fs::write(path, contents)?;
-        }
-        
-        
-        let mut cmd = Command::new("ghdl");
-        cmd.kill_on_drop(true);
-        cmd.args(["-a", "-g", "--std=08"]);
-        for name in files.keys(){
-            let mut path = work_dir.clone();
-            path.push(name);
-            cmd.arg(path);
-        }
-        cmd.arg(std::fs::canonicalize("../rtl/tb.vhdl")?);
-        
-        cmd.stdin(std::process::Stdio::piped())
-            .stdout(std::process::Stdio::piped())
-            .stderr(std::process::Stdio::piped());
-        
-        cmd.current_dir(&work_dir);
-        ensure_ok(cmd.spawn()?).await?;
+    cmd.stdin(std::process::Stdio::piped())
+        .stdout(std::process::Stdio::piped())
+        .stderr(std::process::Stdio::piped());
 
-        let mut cmd = Command::new("ghdl");
-        cmd.kill_on_drop(true);
-        cmd.args(["-e", "--std=08"]);
-        cmd.arg(format!("-Wl,{}", std::fs::canonicalize("../conn/target/release/libvhdl_ui.a")?.display()));
-        cmd.arg("tb");
-        cmd.current_dir(&work_dir);
-        cmd.stdin(std::process::Stdio::piped())
-            .stdout(std::process::Stdio::piped())
-            .stderr(std::process::Stdio::piped());
-        ensure_ok(cmd.spawn()?).await?;
+    cmd.current_dir(&work_dir);
+    ensure_ok(cmd.spawn()?).await?;
 
-        Ok(work_dir)
-}
+    let mut cmd = Command::new("ghdl");
+    cmd.kill_on_drop(true);
+    cmd.args(["-e", "--std=08"]);
+    cmd.arg(format!(
+        "-Wl,{}",
+        std::fs::canonicalize("../conn/target/release/libvhdl_ui.a")?.display()
+    ));
+    cmd.arg("tb");
+    cmd.current_dir(&work_dir);
+    cmd.stdin(std::process::Stdio::piped())
+        .stdout(std::process::Stdio::piped())
+        .stderr(std::process::Stdio::piped());
+    ensure_ok(cmd.spawn()?).await?;
+
+    Ok(work_dir)
+}

relay/src/local.rs

@@ -0,0 +1,258 @@
+use axum::{
+    Error, extract::ws::{Message, WebSocket}
+};
+use futures_util::{
+    SinkExt, StreamExt,
+    stream::{SplitSink, SplitStream},
+};
+use serde::{Deserialize, Serialize};
+use std::{collections::HashMap, path::PathBuf, time::Duration};
+use tokio::{
+    io::{AsyncBufReadExt, BufReader, Lines},
+    process::{Child, ChildStderr, ChildStdin, ChildStdout},
+};
+
+use crate::{build, run};
+
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(tag = "type", rename_all = "snake_case")]
+enum ClientMsg {
+    Compile(Option<HashMap<String, String>>),
+    Start,
+    Stop,
+    Input {
+        /// bitfield of 32 switches
+        switch: u32,
+        /// bitfield of 32 buttons
+        buttons: u32,
+    },
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+enum ServerMsg<'a> {
+    Log { stream: &'a str, line: &'a str },
+    Start,
+    Stop,
+    Led(u32),
+    Seg0(u32),
+    Seg1(u32),
+    Seg2(u32),
+    Seg3(u32),
+}
+
+struct Process {
+    process: Child,
+
+    stderr: Lines<BufReader<ChildStderr>>,
+    stdout: Lines<BufReader<ChildStdout>>,
+    stdin: ChildStdin,
+}
+
+enum Mode {
+    SingleLocal,
+    Remote,
+}
+
+struct Handler {
+    sender: SplitSink<WebSocket, Message>,
+    receiver: SplitStream<WebSocket>,
+
+    build_dir: PathBuf,
+    src_dir: PathBuf,
+
+    program: Option<PathBuf>,
+    process: Option<Process>,
+
+    refresh_time: Duration,
+}
+
+type HResult<T> = Result<T, Box<dyn std::error::Error + Sync + Send>>;
+
+impl Handler {
+
+    async fn local(socket: WebSocket, build: PathBuf, src: PathBuf) -> Self {
+        let (sender, receiver) = socket.split();
+        Self {
+            sender,
+            receiver,
+            build_dir: build,
+            src_dir: src,
+            program: None,
+            process: None,
+            refresh_time: Duration::from_millis(30),
+        }
+    }
+
+    async fn print(&mut self, msg: impl AsRef<str>) {
+        println!("stdout: {}", msg.as_ref());
+        let msg = ServerMsg::Log {
+            stream: "stdout",
+            line: msg.as_ref(),
+        };
+        _ = self.sender.send(Message::Text(serde_json::to_string(&msg).unwrap_or_default().into())).await;
+    }
+
+    pub async fn eprint(&mut self, msg: impl AsRef<str>) {
+        println!("stderr: {}", msg.as_ref());
+        let msg = ServerMsg::Log {
+            stream: "stderr",
+            line: msg.as_ref(),
+        };
+        _ = self.sender.send(Message::Text(serde_json::to_string(&msg).unwrap_or_default().into())).await;
+    }
+
+    async fn stop_process(&mut self) {
+        self.process = None;
+        _ = self.sender.send(Message::Text(serde_json::to_string(&ServerMsg::Stop).unwrap_or_default().into())).await;
+    }
+
+    async fn handle_websocket_msg(&mut self, msg: ClientMsg) -> HResult<bool> {
+        match msg{
+            ClientMsg::Compile(_) => todo!(),
+            ClientMsg::Start => self.run_program().await,
+            ClientMsg::Stop => self.stop_process().await,
+            ClientMsg::Input { switch, buttons } => {
+                if let Some(process) = &mut self.process{
+                    use tokio::io::AsyncWriteExt;
+                    process.stdin.write_all(format!("btn={}\n", buttons).as_bytes()).await?;
+                    process.stdin.write_all(format!("sw={}\n", switch).as_bytes()).await?;
+                }
+            },
+        }
+        Ok(false)
+    }
+
+    async fn handle_websocket_receive(
+        &mut self,
+        msg: Option<Result<Message, Error>>,
+    ) -> bool {
+        match msg {
+            Some(Ok(Message::Close(_))) => true,
+            Some(Ok(Message::Text(msg))) => {
+                let msg = match serde_json::from_str(msg.as_str()){
+                    Ok(msg) => msg,
+                    Err(err) => {
+                        self.eprint(format!("Client message error {err}")).await;
+                        return false;
+                    }
+                };
+                self.handle_websocket_msg(msg).await;
+                false
+            }
+            Some(Ok(_)) => false,
+            Some(Err(err)) => {
+                self.eprint(format!("Client websocket error {err}")).await;
+                true
+            },
+            None => true,
+        }
+    }
+
+    async fn run(&mut self) -> Result<(), Box<dyn std::error::Error + Sync + Send>> {
+        loop {
+            if let Some(process) = &mut self.process {
+                if let Ok(Some(_)) = process.process.try_wait(){
+                    self.stop_process().await;
+                    continue;
+                }
+                tokio::select! {
+                    receive = self.receiver.next() => {
+                        if self.handle_websocket_receive(receive).await{
+                            break;
+                        }
+                    }
+                    out = process.stdout.next_line() => {
+                        match out {
+                            Ok(Some(line)) => self.print(line).await,
+                            Ok(None) => self.stop_process().await,
+                            Err(err) => {
+                                self.eprint(format!("Failed to read proccess sout: {err}")).await;
+                                self.stop_process().await;
+                            }
+                        }
+                    }
+                    err = process.stderr.next_line() => {
+                        match err{
+                            Ok(Some(line)) => {
+                                let msg = if let Some(repr) = line.strip_prefix("led="){
+                                    ServerMsg::Led(repr.parse().unwrap_or(0))
+                                }else if let Some(repr) = line.strip_prefix("seg0="){
+                                    ServerMsg::Seg0(repr.parse().unwrap_or(0))
+                                }else if let Some(repr) = line.strip_prefix("seg1="){
+                                    ServerMsg::Seg1(repr.parse().unwrap_or(0))
+                                }else if let Some(repr) = line.strip_prefix("seg2="){
+                                    ServerMsg::Seg2(repr.parse().unwrap_or(0))
+                                }else if let Some(repr) = line.strip_prefix("seg3="){
+                                    ServerMsg::Seg3(repr.parse().unwrap_or(0))
+                                }else{
+                                    self.eprint(line).await;
+                                    continue;
+                                };
+                                self.sender.send(Message::Text(serde_json::to_string(&msg)?.into())).await?;
+                            },
+                            Ok(None) => self.stop_process().await,
+                            Err(err) => {
+                                self.eprint(format!("Failed to read proccess serr: {err}")).await;
+                                self.stop_process().await;
+                            }
+                        }
+                    }
+                    _ = tokio::time::sleep(self.refresh_time) => {
+                        use tokio::io::AsyncWriteExt;
+                        _ = process.stdin.write_all("\n".as_bytes()).await;
+                    }
+                }
+            }else{
+                let res = self.receiver.next().await;
+                if self.handle_websocket_receive(res).await{
+                    break;
+                }
+            }
+        }
+        Ok(())
+    }
+
+    async fn build_program(&mut self) {
+        let files = if let Some(Ok(Message::Text(msg))) = self.receiver.next().await
+            && let Ok(files) = serde_json::from_str::<'_, HashMap<String, String>>(&msg)
+        {
+            files
+        } else {
+            return;
+        };
+
+        let artifact_dir = match build::build(files).await {
+            Ok(dir) => dir,
+            Err(err) => {
+                _ = self
+                    .sender
+                    .send(Message::Text(format!("Failed to build: {err}").into()))
+                    .await;
+                return;
+            }
+        };
+    }
+
+    async fn run_program(&mut self) {
+        let process = match run::run(&self.build_dir).await {
+            Ok(process) => process,
+            Err(err) => {
+                self.eprint(format!("Failed to run: {err}")).await;
+                return;
+            }
+        };
+        let stdout = BufReader::new(process.stdout).lines();
+        let stderr = BufReader::new(process.stderr).lines();
+        let stdin = process.stdin;
+
+        self.process = Some(
+            Process { process: process.child, stderr, stdout, stdin }
+        )
+    }
+}
+
+pub async fn ws_handler(socket: WebSocket) {
+    Handler::local(socket, "target".into(), "src".into());
+}

relay/src/main.rs

@@ -3,24 +3,30 @@ use axum::{
     extract::ws::{Message, WebSocket, WebSocketUpgrade},
     routing::get,
 };
-use futures_util::{SinkExt, StreamExt};
+use futures_util::{
+    stream::{SplitSink, SplitStream},
+};
 use serde::{Deserialize, Serialize};
-use std::{collections::HashMap, net::SocketAddr};
+use std::{collections::HashMap, net::SocketAddr, path::PathBuf, time::Duration};
 use tokio::{
-    io::{AsyncBufReadExt, BufReader},
+    io::{BufReader, Lines},
+    process::{Child, ChildStderr, ChildStdin, ChildStdout},
 };
 use tower_http::services::ServeDir;
 
+use crate::build::TempDir;
+
 pub mod build;
 pub mod run;
-
+pub mod local;
+pub mod remote;
 
 #[tokio::main]
 async fn main() {
     let app = Router::new()
         .route(
             "/ws",
-            get(|ws: WebSocketUpgrade| async move { ws.on_upgrade(ws_handler) }),
+            get(|ws: WebSocketUpgrade| async move { ws.on_upgrade(remote::ws_handler) }),
         )
         .fallback_service(ServeDir::new("ui"));
 
@@ -32,132 +38,52 @@ async fn main() {
         .unwrap();
 }
 
-
 #[derive(Debug, Clone, Serialize, Deserialize)]
 #[serde(tag = "type", rename_all = "snake_case")]
-struct ClientInput{
-    /// bitfield of 32 switches
-    switch: u32, 
-    /// bitfield of 32 buttons
-    buttons: u32
+pub enum ClientMsg {
+    Compile(Option<HashMap<String, String>>),
+    Start,
+    Stop,
+    Input {
+        /// bitfield of 32 switches
+        switch: u32,
+        /// bitfield of 32 buttons
+        buttons: u32,
+    },
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 #[serde(rename_all = "snake_case")]
-enum ServerMsg<'a> {
+pub enum ServerMsg<'a> {
     Log { stream: &'a str, line: &'a str },
+    Start,
+    Stop,
     Led(u32),
     Seg0(u32),
     Seg1(u32),
     Seg2(u32),
-    Seg3(u32)
+    Seg3(u32),
 }
 
-async fn ws_handler(socket: WebSocket) {
-    let (mut sender, mut receiver) = socket.split();
+struct Process {
+    process: Child,
 
-    let files = if let Some(Ok(Message::Text(msg))) = receiver.next().await
-        && let Ok(files) = serde_json::from_str::<'_, HashMap<String, String>>(&msg)
-    {  
-        files
-    } else {
-        return;
-    };
+    stderr: Lines<BufReader<ChildStderr>>,
+    stdout: Lines<BufReader<ChildStdout>>,
+    stdin: ChildStdin,
+}
 
+struct Handler {
+    sender: SplitSink<WebSocket, Message>,
+    receiver: SplitStream<WebSocket>,
 
-    let artifact_dir = match build::build(files).await{
-        Ok(dir) => dir,
-        Err(err) => {
-            _ = sender.send(Message::Text(format!("Failed to build: {err}").into())).await;
-            return;
-        },
-    };
+    build_dir: TempDir,
+    src_dir: PathBuf,
 
-    let mut process = match run::run(&artifact_dir).await{
-        Ok(process) => process,
-        Err(err) => {
-            _ = sender.send(Message::Text(format!("Failed to run: {err}").into())).await;
-            return;
-        },
-    };
-    let mut sout = BufReader::new(process.stdout).lines();
-    let mut serr = BufReader::new(process.stderr).lines();
+    program: Option<PathBuf>,
+    process: Option<Process>,
 
-    let artifact_prefix = artifact_dir.to_str().unwrap_or("\0\0NOPE");
-    
-    let result: Result<(), Box<dyn std::error::Error + Sync + Send>> = async {
-        loop{
-            tokio::select! {
-                receive = receiver.next() => {
-                    match receive{
-                        Some(Ok(Message::Close(_))) => break,
-                        Some(Ok(Message::Text(msg))) => {
-                            let input = serde_json::from_str::<'_, ClientInput>(&msg)?;
-                            use tokio::io::AsyncWriteExt;
-                            process.stdin.write_all(format!("btn={}\n", input.buttons).as_bytes()).await?;
-                            process.stdin.write_all(format!("sw={}\n", input.switch).as_bytes()).await?;
-                        },
-                        Some(Ok(_)) => {},
-                        Some(Err(err)) => Err(err)?,
-                        _ => break,
-                    }
-                }
-                out = sout.next_line() => {
-                    match out{
-                        Ok(Some(line)) => {
-                            
-                            let msg = ServerMsg::Log {
-                                stream: "stdout",
-                                line: line.strip_prefix(artifact_prefix).unwrap_or(&line),
-                            };
-                            sender.send(Message::Text(serde_json::to_string(&msg)?.into())).await?;
-                        },
-                        Ok(None) => break,
-                        Err(err) => {
-                            Err(format!("Failed to read proccess sout: {err}"))?;
-                        }
-                    }
-                }
-                err = serr.next_line() => {
-                    match err{
-                        Ok(Some(line)) => {
-                            let msg = if let Some(repr) = line.strip_prefix("led="){
-                                ServerMsg::Led(repr.parse().unwrap_or(0))
-                            }else if let Some(repr) = line.strip_prefix("seg0="){
-                                ServerMsg::Seg0(repr.parse().unwrap_or(0))
-                            }else if let Some(repr) = line.strip_prefix("seg1="){
-                                ServerMsg::Seg1(repr.parse().unwrap_or(0))
-                            }else if let Some(repr) = line.strip_prefix("seg2="){
-                                ServerMsg::Seg2(repr.parse().unwrap_or(0))
-                            }else if let Some(repr) = line.strip_prefix("seg3="){
-                                ServerMsg::Seg3(repr.parse().unwrap_or(0))
-                            }else{
-                                ServerMsg::Log {
-                                    stream: "stderr",
-                                    line: line.strip_prefix(artifact_prefix).unwrap_or(&line),
-                                }
-                            };
-                            sender.send(Message::Text(serde_json::to_string(&msg)?.into())).await?;
-                        },
-                        Ok(None) => break,
-                        Err(err) => {
-                            Err(format!("Failed to read proccess serr: {err}"))?
-                        }
-                    }
-                }
-                _ = tokio::time::sleep(std::time::Duration::from_millis(30)) => {
-                    use tokio::io::AsyncWriteExt;
-                    process.stdin.write_all("\n".as_bytes()).await?;
-                }
-            }        
-        }
-        Ok(())
-    }.await;
+    refresh_time: Duration,
+}
 
-    match result{
-        Ok(_) => {},
-        Err(err) => {
-            _ = sender.send(Message::Text(format!("{err}").into())).await;
-        },
-    }
-}
+pub type HResult<T> = Result<T, Box<dyn std::error::Error + Sync + Send>>;

relay/src/remote.rs

@@ -0,0 +1,128 @@
+use axum::{
+    extract::ws::{Message, WebSocket},
+};
+use futures_util::{
+    SinkExt, StreamExt,
+};
+use std::collections::HashMap;
+use tokio::{
+    io::{AsyncBufReadExt, BufReader},
+};
+
+use crate::{ClientMsg, HResult, ServerMsg, build, run};
+
+pub async fn ws_handler(socket: WebSocket) {
+    let (mut sender, mut receiver) = socket.split();
+
+    let files = if let Some(Ok(Message::Text(msg))) = receiver.next().await
+        && let Ok(files) = serde_json::from_str::<'_, HashMap<String, String>>(&msg)
+    {  
+        files
+    } else {
+        return;
+    };
+
+
+    let artifact_dir = match build::build(files).await{
+        Ok(dir) => dir,
+        Err(err) => {
+            _ = sender.send(Message::Text(format!("Failed to build: {err}").into())).await;
+            return;
+        },
+    };
+
+    let mut process = match run::run(&artifact_dir).await{
+        Ok(process) => process,
+        Err(err) => {
+            _ = sender.send(Message::Text(format!("Failed to run: {err}").into())).await;
+            return;
+        },
+    };
+    let mut sout = BufReader::new(process.stdout).lines();
+    let mut serr = BufReader::new(process.stderr).lines();
+
+    let artifact_prefix = artifact_dir.to_str().unwrap_or("\0\0NOPE");
+    
+    let result: HResult<()> = async {
+        loop{
+            tokio::select! {
+                receive = receiver.next() => {
+                    match receive{
+                        Some(Ok(Message::Close(_))) => break,
+                        Some(Ok(Message::Text(msg))) => {
+                            let input = serde_json::from_str::<'_, ClientMsg>(&msg)?;
+                            match input{
+                                ClientMsg::Compile(_) => {},
+                                ClientMsg::Start => {},
+                                ClientMsg::Stop => break,
+                                ClientMsg::Input { switch, buttons } => {
+                                    use tokio::io::AsyncWriteExt;
+                                    process.stdin.write_all(format!("btn={}\n", buttons).as_bytes()).await?;
+                                    process.stdin.write_all(format!("sw={}\n", switch).as_bytes()).await?;
+                                },
+                            }
+                        },
+                        Some(Ok(_)) => {},
+                        Some(Err(err)) => Err(err)?,
+                        _ => break,
+                    }
+                }
+                out = sout.next_line() => {
+                    match out{
+                        Ok(Some(line)) => {
+                            
+                            let msg = ServerMsg::Log {
+                                stream: "stdout",
+                                line: line.strip_prefix(artifact_prefix).unwrap_or(&line),
+                            };
+                            sender.send(Message::Text(serde_json::to_string(&msg)?.into())).await?;
+                        },
+                        Ok(None) => break,
+                        Err(err) => {
+                            Err(format!("Failed to read proccess sout: {err}"))?;
+                        }
+                    }
+                }
+                err = serr.next_line() => {
+                    match err{
+                        Ok(Some(line)) => {
+                            let msg = if let Some(repr) = line.strip_prefix("led="){
+                                ServerMsg::Led(repr.parse().unwrap_or(0))
+                            }else if let Some(repr) = line.strip_prefix("seg0="){
+                                ServerMsg::Seg0(repr.parse().unwrap_or(0))
+                            }else if let Some(repr) = line.strip_prefix("seg1="){
+                                ServerMsg::Seg1(repr.parse().unwrap_or(0))
+                            }else if let Some(repr) = line.strip_prefix("seg2="){
+                                ServerMsg::Seg2(repr.parse().unwrap_or(0))
+                            }else if let Some(repr) = line.strip_prefix("seg3="){
+                                ServerMsg::Seg3(repr.parse().unwrap_or(0))
+                            }else{
+                                ServerMsg::Log {
+                                    stream: "stderr",
+                                    line: line.strip_prefix(artifact_prefix).unwrap_or(&line),
+                                }
+                            };
+                            sender.send(Message::Text(serde_json::to_string(&msg)?.into())).await?;
+                        },
+                        Ok(None) => break,
+                        Err(err) => {
+                            Err(format!("Failed to read proccess serr: {err}"))?
+                        }
+                    }
+                }
+                _ = tokio::time::sleep(std::time::Duration::from_millis(30)) => {
+                    use tokio::io::AsyncWriteExt;
+                    process.stdin.write_all("\n".as_bytes()).await?;
+                }
+            }        
+        }
+        Ok(())
+    }.await;
+
+    match result{
+        Ok(_) => {},
+        Err(err) => {
+            _ = sender.send(Message::Text(format!("{err}").into())).await;
+        },
+    }
+}

relay/src/run.rs

@@ -1,17 +1,24 @@
-use std::{path::Path};
+use std::path::Path;
 
-use tokio::process::{Child, ChildStdin, ChildStdout, ChildStderr, Command};
+use tokio::process::{Child, ChildStderr, ChildStdin, ChildStdout, Command};
 
-pub struct Process{
+pub struct Process {
     pub child: Child,
     pub stdin: ChildStdin,
-    pub stdout: ChildStdout, 
-    pub stderr: ChildStderr
+    pub stdout: ChildStdout,
+    pub stderr: ChildStderr,
 }
 
-pub async fn run(artifact_dir: &Path)  -> Result<Process, Box<dyn std::error::Error + Send + Sync>>{
-        let mut cmd = Command::new("ghdl");
-    cmd.args(["-r", "--std=08", "tb", "--stop-delta=4294967296", "--unbuffered", "--"]);
+pub async fn run(artifact_dir: &Path) -> Result<Process, Box<dyn std::error::Error + Send + Sync>> {
+    let mut cmd = Command::new("ghdl");
+    cmd.args([
+        "-r",
+        "--std=08",
+        "tb",
+        "--stop-delta=4294967296",
+        "--unbuffered",
+        "--",
+    ]);
     cmd.args(std::env::args_os());
     cmd.current_dir(artifact_dir);
     cmd.kill_on_drop(true);
@@ -26,5 +33,10 @@ pub async fn run(artifact_dir: &Path)  -> Result<Process, Box<dyn std::error::Er
     let stdout = child.stdout.take().ok_or("no stdout")?;
     let stderr = child.stderr.take().ok_or("no stderr")?;
 
-    Ok(Process { child, stdin, stdout, stderr })
-}
+    Ok(Process {
+        child,
+        stdin,
+        stdout,
+        stderr,
+    })
+}