set env for gomuks

Fixes #62

.gitmodules

@@ -1,4 +1,4 @@
 [submodule "gomuks"]
 	path = gomuks
-	url = https://github.com/gomuks/gomuks
+	url = https://github.com/Henry-Hiles/gomuks
-	branch = main
+	branch = quad/chore/remove-root-set

gomuks

@@ -1 +1 @@
-Subproject commit 0e06c7b74f96d3e29a8101893ca1921d13a90573
+Subproject commit 9e45ee426cc8be0bfada269f4abc4957c30e994e

lib/controllers/client.dart

@@ -54,8 +54,19 @@ import "package:path_provider/path_provider.dart";
 class ClientController extends AsyncNotifier<int> {
   @override
   Future<int> build() async {
-    final path = "${(await getApplicationSupportDirectory()).path}/gomuks";
+    if (Platform.isAndroid || Platform.isIOS) {
-    final handle = await init(path);
+      final env = {
+        "GOMUKS_ROOT": (await getApplicationSupportDirectory()).path,
+        "GOMUKS_CACHE_HOME": (await getApplicationCacheDirectory()).path,
+      };
+      for (final MapEntry(:key, :value) in env.entries) {
+        GomuksSetEnv(
+          key.toNativeUtf8().cast<Char>(),
+          value.toNativeUtf8().cast<Char>(),
+        );
+      }
+    }
+    final handle = await Isolate.run(GomuksInit);
 
     final callable =
         NativeCallable<
@@ -152,13 +163,6 @@ class ClientController extends AsyncNotifier<int> {
     throw Exception("GomuksStart returned error code $errorCode");
   }
 
-  Future<int> init(String path) => Isolate.run(
-    () => GomuksInit(
-      ((Platform.isAndroid || Platform.isIOS) ? path.toNativeUtf8() : nullptr)
-          .cast(),
-    ),
-  );
-
   Future<dynamic> callGomuksMethod(
     Map<String, dynamic> data,
     FutureOr<GomuksResponse> Function(int handle, GomuksBorrowedBuffer data)