Prevent second terminal on Windows and attach console.

Author: JM

Cargo.lock

@@ -46,6 +46,12 @@ mimalloc = { version = "0.1", default-features = false }
 [target.'cfg(any(target_os = "macos", target_os = "windows"))'.dependencies]
 serialport = "4.0.1"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+windows = { version = ">=0.24", features = [
+  "Win32_System_Console",
+  "Win32_Foundation",
+] }
+
 [dev-dependencies]
 logtest = "2.0.0"
 serial_test = "0.5.1"

console_backend/Cargo.toml

@@ -14,6 +14,14 @@ use crate::server_recv_thread::server_recv_thread;
 use crate::shared_state::SharedState;
 use crate::utils::{refresh_connection_frontend, refresh_loggingbar};
 
+pub(crate) fn attach_console() {
+    #[cfg(target_os = "windows")]
+    {
+        use windows::Win32::System::Console::AttachConsole;
+        unsafe { AttachConsole(u32::MAX).as_bool() }
+    }
+}
+
 /// The backend server
 #[pyclass]
 struct Server {
@@ -101,6 +109,7 @@ impl Server {
 
     #[text_signature = "($self, /)"]
     pub fn start(&mut self) -> PyResult<ServerEndpoint> {
+        attach_console();
         let (client_send, client_recv) = channel::unbounded();
         let (server_send, server_recv) = channel::unbounded();
         let client_send = ChannelSender::boxed(client_send);

console_backend/src/server.rs

@@ -12,3 +12,9 @@ edition = "2018"
 name = "console"
 path = "src/main.rs"
 bench = false
+
+[target.'cfg(target_os = "windows")'.dependencies]
+windows = { version = ">=0.24", features = [
+  "Win32_System_Console",
+  "Win32_Foundation",
+] }

entrypoint/Cargo.toml

@@ -1,9 +1,18 @@
+#![cfg_attr(target_os = "windows", windows_subsystem = "windows")]
 use std::env;
 use std::path::{Path, PathBuf};
 use std::process::Command;
 
 type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;
 
+pub(crate) fn attach_console() {
+    #[cfg(target_os = "windows")]
+    {
+        use windows::Win32::System::Console::AttachConsole;
+        unsafe { AttachConsole(u32::MAX).as_bool() }
+    }
+}
+
 #[cfg(target_os = "windows")]
 fn find_py(dir: &Path) -> PathBuf {
     dir.parent().expect("no parent dir").join("pythonw.exe")
@@ -47,5 +56,6 @@ fn main() -> Result<()> {
     let me = env::current_exe()?;
     let parent = me.parent().ok_or("no parent directory")?;
     let py = find_py(parent);
+    attach_console();
     start(&py)
 }