[Bug] Codegen wasm option creates files that flutter cannot run against

[davidpbrown]

Describe the bug

Codegen is really useful; so, surprised to see an option that's not just working well.

Using the basic flutter_rust_bridge_template.

This with wasm option included, completes ok but creates generated files that it seems flutter cannot run against:

flutter_rust_bridge_codegen --rust-input ./native/src/api.rs --dart-output ./lib/bridge_generated.dart --wasm --dart-decl-output ./lib/bridge_generated.web.dart

This works well for flutter to run but without that wasm option:

flutter_rust_bridge_codegen --rust-input ./native/src/api.rs --dart-output ./lib/bridge_generated.dart

flutter run error seems to centre on

Error: 'NativePlatform' is imported from both 'package:flutter_rust_bridge_template/bridge_generated.web.dart' and 'package:flutter_rust_bridge_template/bridge_generated.io.dart'.
import 'bridge_generated.io.dart'

Full error from flutter against wasm generated Codegen outputs:

$ flutter run
Using hardware rendering with device sdk gphone64 x86 64. If you notice graphics artifacts, consider enabling software rendering with
"--enable-software-rendering".
Launching lib/main.dart on sdk gphone64 x86 64 in debug mode...
lib/main.dart:54:15: Error: Type 'Platform' not found.
  late Future<Platform> platform;
              ^^^^^^^^
lib/main.dart:54:15: Error: 'Platform' isn't a type.
  late Future<Platform> platform;
              ^^^^^^^^
lib/main.dart:132:23: Error: 'Platform' isn't a type.
                final Platform platform = data[0];
                      ^^^^^^^^
lib/main.dart:135:23: Error: Undefined name 'Platform'.
                      Platform.Android: 'Android',
                      ^^^^^^^^
lib/main.dart:136:23: Error: Undefined name 'Platform'.
                      Platform.Ios: 'iOS',
                      ^^^^^^^^
lib/main.dart:137:23: Error: Undefined name 'Platform'.
                      Platform.MacApple: 'MacOS with Apple Silicon',
                      ^^^^^^^^
lib/main.dart:138:23: Error: Undefined name 'Platform'.
                      Platform.MacIntel: 'MacOS',
                      ^^^^^^^^
lib/main.dart:139:23: Error: Undefined name 'Platform'.
                      Platform.Windows: 'Windows',
                      ^^^^^^^^
lib/main.dart:140:23: Error: Undefined name 'Platform'.
                      Platform.Unix: 'Unix',
                      ^^^^^^^^
lib/main.dart:141:23: Error: Undefined name 'Platform'.
                      Platform.Wasm: 'the Web',
                      ^^^^^^^^
lib/ffi.dart:20:7: Error: Type 'Native' not found.
final Native api = NativeImpl(io.Platform.isIOS || io.Platform.isMacOS
      ^^^^^^
lib/ffi.dart:20:7: Error: 'Native' isn't a type.
final Native api = NativeImpl(io.Platform.isIOS || io.Platform.isMacOS
      ^^^^^^
lib/bridge_generated.dart:14:29: Error: Type 'Native' not found.
class NativeImpl implements Native {
                            ^^^^^^
lib/bridge_generated.dart:88:10: Error: Type 'Platform' not found.
  Future<Platform> platform({dynamic hint}) {
         ^^^^^^^^
lib/bridge_generated.dart:137:3: Error: Type 'Platform' not found.
  Platform _wire2api_platform(dynamic raw) {
  ^^^^^^^^
lib/bridge_generated.dart:9:1: Error: 'NativePlatform' is imported from both 'package:flutter_rust_bridge_template/bridge_generated.web.dart' and 'package:flutter_rust_bridge_template/bridge_generated.io.dart'.
import 'bridge_generated.io.dart'
^^^^^^^^^^^^^^
lib/bridge_generated.dart:17:22: Error: 'NativePlatform' is imported from both 'package:flutter_rust_bridge_template/bridge_generated.web.dart' and 'package:flutter_rust_bridge_template/bridge_generated.io.dart'.
      NativeImpl.raw(NativePlatform(dylib));
                     ^^^^^^^^^^^^^^
lib/bridge_generated.dart:138:12: Error: The getter 'Platform' isn't defined for the class 'NativeImpl'.
 - 'NativeImpl' is from 'package:flutter_rust_bridge_template/bridge_generated.dart' ('lib/bridge_generated.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'Platform'.
    return Platform.values[raw];
           ^^^^^^^^
lib/bridge_generated.web.dart:52:26: Error: Type 'FlutterRustBridgeWasmWireBase' not found.
class NativeWire extends FlutterRustBridgeWasmWireBase<NativeWasmModule> {
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
lib/bridge_generated.web.dart:28:2: Error: Couldn't find constructor 'JS'.
@JS('wasm_bindgen')
 ^^
lib/bridge_generated.web.dart:13:30: Error: Type argument 'NativeWire' doesn't conform to the bound 'FlutterRustBridgeWireBase' of the type variable 'T' on 'FlutterRustBridgeBase'.
 - 'NativeWire' is from 'package:flutter_rust_bridge_template/bridge_generated.web.dart' ('lib/bridge_generated.web.dart').
 - 'FlutterRustBridgeWireBase' is from 'package:flutter_rust_bridge/src/ffi/stub.dart' ('../../dev-tools/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_rust_bridge-1.57.0/lib/src/ffi/stub.dart').
Try changing type arguments so that they conform to the bounds.
class NativePlatform extends FlutterRustBridgeBase<NativeWire>
                             ^
lib/bridge_generated.web.dart:14:10: Error: Inferred type argument 'NativeWire' doesn't conform to the bound 'FlutterRustBridgeWireBase' of the type variable 'T' on 'FlutterRustBridgeSetupMixin'.
 - 'NativeWire' is from 'package:flutter_rust_bridge_template/bridge_generated.web.dart' ('lib/bridge_generated.web.dart').
 - 'FlutterRustBridgeWireBase' is from 'package:flutter_rust_bridge/src/ffi/stub.dart' ('../../dev-tools/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_rust_bridge-1.57.0/lib/src/ffi/stub.dart').
Try specifying type arguments explicitly so that they conform to the bounds.
    with FlutterRustBridgeSetupMixin {
         ^
lib/bridge_generated.web.dart:31:2: Error: Couldn't find constructor 'JS'.
@JS()
 ^^
lib/bridge_generated.web.dart:32:2: Error: Undefined name 'anonymous'.
@anonymous
 ^^^^^^^^^
lib/bridge_generated.web.dart:32:2: Error: This can't be used as an annotation; an annotation should be a reference to a compile-time constant variable, or a call to a constant constructor.
@anonymous
 ^
lib/bridge_generated.web.dart:18:33: Error: The getter 'init' isn't defined for the class 'NativeWire'.
 - 'NativeWire' is from 'package:flutter_rust_bridge_template/bridge_generated.web.dart' ('lib/bridge_generated.web.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'init'.
  Future<void> setup() => inner.init;
                                ^^^^
lib/bridge_generated.web.dart:54:14: Error: Too many positional arguments: 0 allowed, but 1 found.
Try removing the extra positional arguments.
      : super(WasmModule.cast<NativeWasmModule>(module));
             ^


FAILURE: Build failed with an exception.

* Where:
Script '/mnt/vault/dev-tools/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 1159

* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command '/mnt/vault/dev-tools/flutter/bin/flutter'' finished with non-zero exit value 1

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 35s
Running Gradle task 'assembleDebug'...                             37.7s
Exception: Gradle task assembleDebug failed with exit code 1

Codegen logs with RUST_LOG=debug environment variable

Codegen completes with no errors.. but the output is evidently muddled for what flutter can make sense of.

To Reproduce

include the option --wasm --dart-decl-output ./lib/bridge_generated.web.dart
flutter run in Android Studio
generates error where without that option it works.

Expected behavior

wasm generated file bridge_generated.web should work well and flutter should not complain about 'NativePlatform' imported from both 'package:flutter_rust_bridge_template/bridge_generated.web.dart' and 'package:flutter_rust_bridge_template/bridge_generated.io.dart'.

Generated binding code

No response

OS

Linux

Version of flutter_rust_bridge_codegen

Generated by flutter_rust_bridge@ 1.58.2

Flutter info

$ flutter doctor -v
[✓] Flutter (Channel stable, 3.3.10, on Linux Mint 21 5.15.0-56-generic, locale
    en_GB.UTF-8)
    • Flutter version 3.3.10 on channel stable at /mnt/vault/dev-tools/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 135454af32 (12 days ago), 2022-12-15 07:36:55 -0800
    • Engine revision 3316dd8728
    • Dart version 2.18.6
    • DevTools version 2.15.0

[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.1)
    • Android SDK at /mnt/vault/dev-tools/Android/Sdk
    • Platform android-33, build-tools 33.0.1
    • ANDROID_SDK_ROOT = /mnt/vault/dev-tools/Android/Sdk
    • Java binary at: /mnt/vault/dev-tools/Android/android-studio/jre/bin/java
    • Java version OpenJDK Runtime Environment (build
      11.0.13+0-b1751.21-8125866)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • CHROME_EXECUTABLE = /usr/bin/chromium

[✓] Linux toolchain - develop for Linux desktop
    • Ubuntu clang version 14.0.0-1ubuntu1
    • cmake version 3.22.1
    • ninja version 1.10.1
    • pkg-config version 0.29.2

[✓] Android Studio (version 2021.3)
    • Android Studio at /mnt/vault/dev-tools/Android/android-studio
    • Flutter plugin version 71.2.3
    • Dart plugin version 213.7433
    • Java version OpenJDK Runtime Environment (build
      11.0.13+0-b1751.21-8125866)

[✓] VS Code (version 1.74.2)
    • VS Code at /usr/share/code
    • Flutter extension version 3.56.0

[✓] Connected device (3 available)
    • sdk gphone64 x86 64 (mobile) • emulator-5554 • android-x64    • Android 12
      (API 31) (emulator)
    • Linux (desktop)              • linux         • linux-x64      • Linux Mint
      21 5.15.0-56-generic
    • Chrome (web)                 • chrome        • web-javascript • Chromium
      108.0.5359.124 for Linux Mint

[✓] HTTP Host Availability
    • All required HTTP hosts are available

• No issues found!

Version of clang++

No response

Version of ffigen

No response

Additional context

No response

[welcome]

Hi! Thanks for opening your first issue here! 😄

[fzyzcjy]

/cc @Desdaemon who implemented the great web feature

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

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