[hive_flutter] Use conditional imports of io dependencies

Improves pub score by conditionally importing path and path_provider

Author: baumths

hive_flutter/lib/hive_flutter.dart

@@ -5,8 +5,10 @@ import 'dart:async';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
 import 'package:hive/hive.dart';
-import 'package:path_provider/path_provider.dart';
-import 'package:path/path.dart' as path_helper;
+import 'package:path_provider/path_provider.dart'
+    if (dart.library.html) 'src/stub/path_provider.dart';
+import 'package:path/path.dart' if (dart.library.html) 'src/stub/path.dart'
+    as path_helper;
 
 export 'package:hive/hive.dart';
 

hive_flutter/lib/src/hive_extensions.dart

@@ -5,11 +5,11 @@ extension HiveX on HiveInterface {
   /// Initializes Hive with the path from [getApplicationDocumentsDirectory].
   ///
   /// You can provide a [subDir] where the boxes should be stored.
-  Future initFlutter([String? subDir]) async {
+  Future<void> initFlutter([String? subDir]) async {
     WidgetsFlutterBinding.ensureInitialized();
-    if (!kIsWeb) {
-      var appDir = await getApplicationDocumentsDirectory();
-      init(path_helper.join(appDir.path, subDir));
-    }
+    if (kIsWeb) return;
+
+    var appDir = await getApplicationDocumentsDirectory();
+    init(path_helper.join(appDir.path, subDir));
   }
 }

hive_flutter/lib/src/stub/path.dart

@@ -0,0 +1,14 @@
+String join(
+  String part1, [
+  String? part2,
+  String? part3,
+  String? part4,
+  String? part5,
+  String? part6,
+  String? part7,
+  String? part8,
+]) {
+  throw UnimplementedError(
+    '[Hive Error] Tried to use the `path` package from Flutter Web.',
+  );
+}

hive_flutter/lib/src/stub/path_provider.dart

@@ -0,0 +1,9 @@
+abstract class Directory {
+  String get path;
+}
+
+Future<Directory> getApplicationDocumentsDirectory() {
+  throw UnimplementedError(
+    '[Hive Error] Tried to use the `path_provider` package from Flutter Web.',
+  );
+}