[#245] Clean up the output folder, even at the root, to have only the…

… final generated project in the end

bricks/template/hooks/post_gen.dart

@@ -3,13 +3,21 @@ import 'dart:io';
 import 'package:mason/mason.dart';
 
 import 'bundles/permission_handler_bundle.dart';
+import 'pre_gen.dart';
 
 Future<void> run(HookContext context) async {
   try {
     await generateBricks(context);
   } catch (e) {
     context.logger.err(e.toString());
   }
+
+  // Clean up the output folder, even at the root, to have only the final generated project in the end
+  print("> Clean up the output folder (post): " + Directory.current.path);
+  final List<FileSystemEntity> entities = [
+    Directory(Directory.current.path + '/bricks'),
+  ];
+  await deleteFileSystemEntities(entities);
 }
 
 Future<void> generateBricks(HookContext context) async {

bricks/template/hooks/pre_gen.dart

@@ -1,8 +1,21 @@
+import 'dart:io';
+
 import 'package:mason/mason.dart';
 
 import 'bundles/permission_handler_bundle.dart';
 
 Future<void> run(HookContext context) async {
+  // Clean up the output folder, even at the root, to have only the final generated project in the end
+  print("> Clean up the output folder (pre): " + Directory.current.path);
+  final entities = Directory.current.listSync(recursive: false);
+  final exclusions = [
+    // we should not delete .git
+    Directory.current.path + '/.git',
+    // the bricks folder can be delete at post_gen only
+    Directory.current.path + '/bricks',
+  ];
+  await deleteFileSystemEntities(entities, exclusions: exclusions);
+
   try {
     final additionalVars = {};
     if (context.vars['add_permission_handler'] == true) {
@@ -31,3 +44,19 @@ Future<Map<String, dynamic>> addPermissionHandlerVariables() async {
   });
   return vars;
 }
+
+Future<void> deleteFileSystemEntities(
+  List<FileSystemEntity> entities, {
+  List<String> exclusions = const [],
+}) async {
+  entities.forEach((entity) {
+    if (!exclusions.contains(entity.path)) {
+      print('Delete ' + entity.path);
+      if (entity is File) {
+        entity.deleteSync();
+      } else if (entity is Directory) {
+        entity.deleteSync(recursive: true);
+      }
+    }
+  });
+}