feat: add Nix flake for native build PySide6/Qt6

flake.nix

@@ -0,0 +1,136 @@
+{
+  description = "Vial - Open-source GUI for configuring QMK keyboards";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+  };
+
+  outputs =
+    inputs@{ flake-parts, ... }:
+    flake-parts.lib.mkFlake { inherit inputs; } {
+      systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+      ];
+
+      perSystem =
+        { pkgs, self', ... }:
+        let
+          pythonEnv = pkgs.python3.withPackages (
+            ps: with ps; [
+              pyside6
+              qtpy
+              hidapi
+              simpleeval
+              certifi
+            ]
+          );
+        in
+        {
+          packages = {
+            default = self'.packages.vial;
+
+            vial = pkgs.stdenv.mkDerivation {
+              pname = "vial";
+              version = "0.8.0-ilc";
+
+              src = ./.;
+
+              nativeBuildInputs = with pkgs; [
+                qt6.wrapQtAppsHook
+                makeWrapper
+              ];
+
+              buildInputs = with pkgs; [
+                qt6.qtbase
+                libusb1
+              ];
+
+              qtWrapperArgs = [
+                "--unset QT_STYLE_OVERRIDE"
+              ];
+
+              propagatedBuildInputs = [ pythonEnv ];
+
+              dontBuild = true;
+
+              installPhase = ''
+                runHook preInstall
+
+                mkdir -p $out/share/vial
+                cp -r src/main/python/* $out/share/vial/
+                cp -r src/main/resources/base/* $out/share/vial/
+
+                # Create build_settings.json in the resource directory
+                cat > $out/share/vial/build_settings.json << SETTINGS
+                {
+                    "app_name": "Vial",
+                    "author": "ilc",
+                    "version": "0.8.0-ilc"
+                }
+                SETTINGS
+
+                # Patch app_context.py to use our Nix-compatible paths
+                substituteInPlace $out/share/vial/app_context.py \
+                  --replace-fail "return os.path.normpath(os.path.join(script_dir, '..', '..', 'build', 'settings', 'base.json'))" \
+                                 "return os.path.join(script_dir, 'build_settings.json')" \
+                  --replace-fail "return os.path.normpath(os.path.join(script_dir, '..', 'resources', 'base'))" \
+                                 "return script_dir"
+
+                # Create launcher script
+                mkdir -p $out/bin
+                makeWrapper ${pythonEnv}/bin/python $out/bin/vial \
+                  --add-flags "$out/share/vial/main.py"
+
+                # udev rules
+                mkdir -p $out/etc/udev/rules.d
+                echo 'KERNEL=="hidraw*", SUBSYSTEM=="hidraw", MODE="0666", TAG+="uaccess", TAG+="udev-acl"' > $out/etc/udev/rules.d/92-vial.rules
+
+                # Desktop entry
+                mkdir -p $out/share/applications
+                cat > $out/share/applications/vial.desktop << DESKTOP
+                [Desktop Entry]
+                Name=Vial
+                Comment=Configure your QMK keyboard
+                Exec=$out/bin/vial
+                Icon=vial
+                Terminal=false
+                Type=Application
+                Categories=Utility;
+                DESKTOP
+
+                # Icons (if available)
+                if [ -d "src/main/icons" ]; then
+                  mkdir -p $out/share/icons
+                  cp -r src/main/icons/* $out/share/icons/
+                fi
+
+                runHook postInstall
+              '';
+
+              dontWrapQtApps = false;
+
+              preFixup = ''
+                wrapQtApp $out/bin/vial
+              '';
+
+              meta = with pkgs.lib; {
+                description = "Open-source GUI for configuring QMK keyboards in real time";
+                homepage = "https://get.vial.today";
+                license = licenses.gpl2Plus;
+                platforms = platforms.linux;
+                mainProgram = "vial";
+              };
+            };
+          };
+
+          devShells.default = pkgs.mkShell {
+            packages = [
+              pythonEnv
+              pkgs.qt6.qtbase
+            ];
+          };
+        };
+    };
+}