Trouble using matrix-rust-sdk with this

[TheSunCat]

Hi!
This is my first time using Rust, but I wanted to try it out and learn something using this bridge to write a simple Matrix client with it in Flutter. I made sure I can run the frb_example with_flutter, and the matrix-rust-sdk example correctly.
I copy-pasted the example from here, added pub before every function, and changed the Cargo.toml to the following:

[package]
name = "fastchat_rust"
version = "0.1.0"
edition = "2018"

[lib]
name = "fastchat_rust"
crate-type = ["cdylib"]

[build-dependencies]
flutter_rust_bridge_codegen = { version = "1", features = [
  "chrono",
  "uuid",
] }

[dependencies]
anyhow = { version = "1", features = ["backtrace"] }
flutter_rust_bridge = "1"
dirs = "5.0.1"
rand = "0.8.5"
serde = "1.0.171"
serde_json = "1.0.103"
tokio = { version = "1.24.2", features = ["macros", "rt-multi-thread"] }
tracing-subscriber = "0.3.15"
matrix-sdk = { git = "https://github.com/matrix-org/matrix-rust-sdk" }

I also renamed main to start in the code and removed the tokyo directive above it, as I figured I would call this function manually from Flutter to test that the bridge is working. However, when I try to run the codegen, I'm getting a lot of errors. I tried my best to look through the docs but I clearly am missing something.

$ cat codegen.sh
#!/bin/sh
export CPATH="$(clang -v 2>&1 | grep "Selected GCC installation" | rev | cut -d' ' -f1 | rev)/include"

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

$ ./codegen.sh
2023/07/21 22:27:57 [WARN] Skipping unresolvable module bridge_generated (tried /home/apm/Documents/fastchat/rust/src/bridge_generated.rs, /home/apm/Documents/fastchat/rust/src/bridge_generated/mod.rs, /home/apm/Documents/fastchat/rust/src/lib/bridge_generated.rs, /home/apm/Documents/fastchat/rust/src/lib/bridge_generated/mod.rs, )
2023/07/21 22:27:57 [ERROR] panicked at 'Failed to parse function argument type `&Path`', /home/apm/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-1.79.0/src/parser/mod.rs:219:21
thread 'main' panicked at 'Failed to parse function argument type `&Path`', /home/apm/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-1.79.0/src/parser/mod.rs:219:21
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

If I change every &Path to Path, I get the same error but about Client, which is a type inside of the sdk that I am trying to use, so I don't think this is productive, hence asking here.

[fzyzcjy]

Hi, it would be great to give a minimal reproducible sample. For example, just one function with minimal signature, then it is easier to know what happens :)

[TheSunCat]

Tried my best to isolate this:

use std::path::Path;

pub async fn restore_session(session_file: &Path) -> anyhow::Result<()> {
    Ok(())
}

Produces the following output:

2023/07/22 23:23:30 [WARN] Skipping unresolvable module web (tried /home/apm/Documents/fastchat/rust/src/web.rs, /home/apm/Documents/fastchat/rust/src/web/mod.rs, /home/apm/Documents/fastchat/rust/src/bridge_generated/web.rs, /home/apm/Documents/fastchat/rust/src/bridge_generated/web/mod.rs, )
2023/07/22 23:23:30 [WARN] Skipping unresolvable module io (tried /home/apm/Documents/fastchat/rust/src/io.rs, /home/apm/Documents/fastchat/rust/src/io/mod.rs, /home/apm/Documents/fastchat/rust/src/bridge_generated/io.rs, /home/apm/Documents/fastchat/rust/src/bridge_generated/io/mod.rs, )
2023/07/22 23:23:30 [ERROR] panicked at 'Failed to parse function argument type `&Path`', /home/apm/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-1.79.0/src/parser/mod.rs:219:21
thread 'main' panicked at 'Failed to parse function argument type `&Path`', /home/apm/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-1.79.0/src/parser/mod.rs:219:21
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

[fzyzcjy]

Ha, so

1. & is not supported yet IIRC, but feel free to PR!
2. same for async - but it should not be very hard to support it

[TheSunCat]

Thanks for your quick reply! I'm going to play with it some more and see if I can get it working, if not I'll try to learn enough Rust to try to contribute these features back. :)

[fzyzcjy]

You are welcome and looking forward to your results!

[rokk4]

@TheSunCat any update on this? I would be really interested in trying this.