[ffigen] auto-ignore unused imports in bindings (#2750)

Author: goderbauer

pkgs/ffigen/example/add/lib/add.g.dart

@@ -1,7 +1,7 @@
 // AUTO GENERATED FILE, DO NOT EDIT.
 //
 // Generated by `package:ffigen`.
-// ignore_for_file: type=lint
+// ignore_for_file: type=lint, unused_import
 import 'dart:ffi' as ffi;
 
 @ffi.Native<ffi.Int Function(ffi.Int, ffi.Int)>()

pkgs/ffigen/example/c_json/cjson_generated_bindings.dart

@@ -21,7 +21,7 @@
 // AUTO GENERATED FILE, DO NOT EDIT.
 //
 // Generated by `package:ffigen`.
-// ignore_for_file: type=lint
+// ignore_for_file: type=lint, unused_import
 import 'dart:ffi' as ffi;
 
 /// Holds bindings to cJSON.

pkgs/ffigen/example/ffinative/lib/generated_bindings.dart

@@ -5,7 +5,7 @@
 // AUTO GENERATED FILE, DO NOT EDIT.
 //
 // Generated by `package:ffigen`.
-// ignore_for_file: type=lint
+// ignore_for_file: type=lint, unused_import
 @ffi.DefaultAsset('package:ffinative_example/generated_bindings.dart')
 library;
 

pkgs/ffigen/example/libclang-example/generated_bindings.dart

@@ -6,7 +6,7 @@
 // AUTO GENERATED FILE, DO NOT EDIT.
 //
 // Generated by `package:ffigen`.
-// ignore_for_file: type=lint
+// ignore_for_file: type=lint, unused_import
 import 'custom_import.dart' as custom_import;
 import 'dart:ffi' as ffi;
 

pkgs/ffigen/example/objective_c/avf_audio_bindings.dart

@@ -2,13 +2,10 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-// TODO(https://github.com/dart-lang/native/issues/2748): Remove this ignore.
-// ignore_for_file: unused_import
-
 // AUTO GENERATED FILE, DO NOT EDIT.
 //
 // Generated by `package:ffigen`.
-// ignore_for_file: type=lint
+// ignore_for_file: type=lint, unused_import
 import 'dart:ffi' as ffi;
 import 'package:objective_c/objective_c.dart' as objc;
 import 'package:ffi/ffi.dart' as pkg_ffi;

pkgs/ffigen/example/objective_c/generate_code.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+import 'dart:io';
+
 import 'package:ffigen/ffigen.dart';
 import 'package:logging/logging.dart';
 
@@ -27,16 +29,13 @@ final config = FfiGenerator(
 
   output: Output(
     // The Dart file where the bindings will be generated.
-    dartFile: Uri.file('avf_audio_bindings.dart'),
+    dartFile: Platform.script.resolve('avf_audio_bindings.dart'),
 
     // Preamble text to put at the top of the generated file.
     preamble: '''
 // Copyright (c) 2024, the Dart project authors. Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-
-// TODO(https://github.com/dart-lang/native/issues/2748): Remove this ignore.
-// ignore_for_file: unused_import
 ''',
   ),
 );

pkgs/ffigen/example/shared_bindings/lib/generated/a_gen.dart

@@ -1,7 +1,7 @@
 // AUTO GENERATED FILE, DO NOT EDIT.
 //
 // Generated by `package:ffigen`.
-// ignore_for_file: type=lint
+// ignore_for_file: type=lint, unused_import
 import 'dart:ffi' as ffi;
 
 /// Bindings to `headers/a.h`.

pkgs/ffigen/example/shared_bindings/lib/generated/a_shared_b_gen.dart

@@ -1,7 +1,7 @@
 // AUTO GENERATED FILE, DO NOT EDIT.
 //
 // Generated by `package:ffigen`.
-// ignore_for_file: type=lint
+// ignore_for_file: type=lint, unused_import
 import 'dart:ffi' as ffi;
 import 'package:shared_bindings/generated/base_gen.dart' as imp$1;
 

pkgs/ffigen/example/shared_bindings/lib/generated/base_gen.dart

@@ -1,7 +1,7 @@
 // AUTO GENERATED FILE, DO NOT EDIT.
 //
 // Generated by `package:ffigen`.
-// ignore_for_file: type=lint
+// ignore_for_file: type=lint, unused_import
 import 'dart:ffi' as ffi;
 
 /// Bindings to `headers/base.h`.

pkgs/ffigen/example/simple/generated_bindings.dart

@@ -1,7 +1,7 @@
 // AUTO GENERATED FILE, DO NOT EDIT.
 //
 // Generated by `package:ffigen`.
-// ignore_for_file: type=lint
+// ignore_for_file: type=lint, unused_import
 import 'dart:ffi' as ffi;
 
 /// Bindings to `headers/example.h`.