openterface-qt: add udev rules for user access (#379379)

pkgs/by-name/op/openterface-qt/package.nix

@@ -4,9 +4,22 @@
   makeDesktopItem,
   copyDesktopItems,
   fetchFromGitHub,
+  writeText,
   qt6,
   libusb1,
 }:
+let
+  # Based on upstream instructions: https://github.com/TechxArtisanStudio/Openterface_QT#for-linux-users
+  udevRules = writeText "60-openterface.rules" ''
+    # Serial to HID converter for keyboard/mouse control.
+    # ID 1a86:7523 QinHeng Electronics CH340 serial converter
+    KERNEL=="ttyUSB[0-9]*", ATTRS{idVendor}=="1a86", ATTRS{idProduct}=="7523", TAG+="uaccess"
+
+    # "hidraw" device for accessing the host-target toggleable USB port.
+    # ID 534d:2109 MacroSilicon Openterface
+    KERNEL=="hidraw*", ATTRS{idVendor}=="534d", ATTRS{idProduct}=="2109", TAG+="uaccess"
+  '';
+in
 stdenv.mkDerivation (final: {
   pname = "openterface-qt";
   version = "0.1.0";
@@ -33,7 +46,9 @@ stdenv.mkDerivation (final: {
     mkdir -p $out/bin
     cp ./openterfaceQT $out/bin/
     mkdir -p $out/share/pixmaps
-    cp ./images/icon_256.png $out/share/pixmaps/${final.pname}.png
+    cp ./images/icon_256.png $out/share/pixmaps/openterface-qt.png
+    mkdir -p $out/etc/udev/rules.d
+    cp ${udevRules} $out/etc/udev/rules.d/60-openterface.rules
     runHook postInstall
   '';