Fail to canonicalize path with flutter_rust_bridge_codegen on Windows "No such file or directory (os error 2)"

[nexusateam]

Hello Rust community,

I’m encountering an issue with flutter_rust_bridge_codegen (version 2.8.0) on Windows 11 (PowerShell 7.4.6) while generating Dart bindings for my flutter_rust Flutter/Rust project. The command fails with:

Error: Fail to canonicalize path="C:\\projects\\flutter_rust\\lib\\generated_bridge.dart"
Caused by: No such file or directory (os error 2)

Project Setup
Project root: C:\projects\flutter_rust
Rust code: rust/src/lib.rs
Output: lib/generated_bridge.dart
Command: flutter_rust_bridge_codegen generate --rust-input crate --rust-root C:\projects\flutter_rust\rust --dart-output C:\projects\flutter_rust\lib\generated_bridge.dart
Environment: Rust (aarch64-linux-android and x86_64-pc-windows-msvc targets installed), Flutter 3.19.6, NDK 25.1.8937393.
Observations
The lib/ directory exists with main.dart, and permissions are correct.
Creating a dummy generated_bridge.dart allows the command to succeed, but fails with an existing file.
I’ve tried deleting lib/, using absolute paths, admin privileges, WSL, and reinstalling the tool, but the error persists.
Request for Help
Is there a known issue with flutter_rust_bridge_codegen 2.8.0 on Windows causing this path error, or am I missing a configuration? Any suggestions for resolving the "No such file or directory (os error 2)" issue or bypassing it would be appreciated. I’ve reviewed GitHub issue #206, but the problem continues.

Thanks!

[fzyzcjy]

Hi, it seems the config yaml file needs to be fixed. For example, in

flutter_rust_bridge/frb_example/dart_minimal/flutter_rust_bridge.yaml

Line 3 in 43b2fe5

dart_output: lib/src/rust

, it seems the dart_output should be a folder instead of a file.

[nexusateam]

I'm sorry but I'm a beginner in rust and flutter_rust_bridge.

flutter_rust_bridge.yaml

rust_input: crate
rust_root: C:\projects\flutter_rust\rust
dart_output: C:\projects\flutter_rust\lib\generated_bridge.dart

Error: Fail to canonicalize

rust_input: crate
rust_root: C:\projects\flutter_rust\rust
dart_output: C:\projects\flutter_rust\lib\

frb_generated.dart
frb_generated.io.dart
frb_generated.web.dart
lib.dart

Is this right?

[fzyzcjy]

Hi, maybe just follow the Quickstart page to get the configuration