add nix package

.gitignore

@@ -39,3 +39,6 @@ key.properties
 
 # Devel Password
 password.txt
+
+# Nix
+/result

flake.nix

@@ -39,9 +39,14 @@
             };
           };
 
-          packages.default = pkgs.callPackage ./linux/nix/package.nix {
+          packages = {
+            default = pkgs.callPackage ./linux/nix/pkg {
               src = self;
             };
+            gomuks = pkgs.callPackage ./linux/nix/pkg/gomuks.nix {
+              src = self;
+            };
+          };
 
           devShells.default = pkgs.callPackage ./linux/nix/devshell.nix { };
         };

hook/build.dart

@@ -46,9 +46,12 @@ Future<void> main(List<String> args) => build(args, (input, output) async {
       throw UnsupportedError("Unsupported OS: $targetOS");
   }
 
-  final buildDir = input.packageRoot.resolve("build/");
+  var libFile = input.packageRoot.resolve(libFileName);
   final gomuksBuildDir = input.packageRoot.resolve("gomuks/");
-  final libFile = buildDir.resolve("${targetArch.name}/$libFileName");
+
+  if (!(await File.fromUri(libFile).exists())) {
+    final buildDir = input.packageRoot.resolve("build/");
+    libFile = buildDir.resolve("${targetArch.name}/$libFileName");
 
     // goheif/dav1d supported on Android would need to fix upstream
     final tags = targetOS == OS.android ? "goolm,noheic" : "goolm";
@@ -64,7 +67,10 @@ Future<void> main(List<String> args) => build(args, (input, output) async {
     );
 
     if (result.exitCode != 0) {
-    throw Exception("Failed to build Gomuks shared library\n${result.stderr}");
+      throw Exception(
+        "Failed to build Gomuks shared library\n${result.stderr}",
+      );
+    }
   }
 
   final generatedFile = "src/third_party/gomuks.g.dart";

linux/nix/pkg/default.nix

@@ -1,9 +1,9 @@
 {
   lib,
+  callPackage,
   libclang,
   flutter,
   src,
-  go,
 }:
 
 flutter.buildFlutterApplication {
@@ -12,16 +12,13 @@ flutter.buildFlutterApplication {
   inherit src;
 
   preBuild = ''
+    cp ${callPackage ./gomuks.nix { inherit src; }}/lib/* .
     packageRunCustom nexus generate source/scripts test
     packageRun build_runner build
   '';
 
   env.LIBCLANG_PATH = lib.makeLibraryPath [ libclang ];
 
-  nativeBuildInputs = [
-    go
-  ];
-
   autoPubspecLock = src + "/pubspec.lock";
 
   gitHashes = {

linux/nix/pkg/gomuks.nix

@@ -0,0 +1,31 @@
+{
+  src,
+  buildGoModule,
+}:
+
+buildGoModule (finalAttrs: {
+  pname = "gomuks-ffi";
+  version = "submodule";
+
+  doCheck = false;
+
+  src = "${src}/gomuks";
+
+  vendorHash = "sha256-zBDfBZqUoHIfZ0AajZEvSBbskjpFB7yIsomt0KYDo7Y=";
+
+  buildPhase = ''
+    runHook preBuild
+
+    go build -buildmode=c-shared -o libgomuks.so -tags goolm,noheic ./pkg/ffi 
+
+    runHook postBuild
+  '';
+
+  installPhase = ''
+    runHook preInstall
+
+    install -D --mode=0644 libgomuks.so --target-directory $out/lib
+
+    runHook postInstall
+  '';
+})