cake_wallet/cw_core/lib/root_dir.dart

import 'dart:io';
import 'package:path_provider/path_provider.dart';

String? _rootDirPath;

void setRootDirFromEnv()
	=> _rootDirPath = Platform.environment['CAKE_WALLET_DIR'];

Future<Directory> getAppDir({String appName = 'cake_wallet'}) async {
	Directory dir;

	if (_rootDirPath != null && _rootDirPath!.isNotEmpty) {
		dir = Directory.fromUri(Uri.file(_rootDirPath!));
		dir.create(recursive: true);
	} else {
		dir = await getApplicationDocumentsDirectory();

		if (Platform.isLinux) {
			final appDirPath = '${dir.path}/$appName';
			dir = Directory.fromUri(Uri.file(appDirPath));
			await dir.create(recursive: true);
		}
	}

	return dir;
}