frb v2.0.0-dev.38 generated reference to private module and get errors

[svr2kos2]

Hi there, I'm newbie to rust.
Here is my code:

/api
├── hid
│   ├── mod.rs
│   ├── hid_api.rs
│   ├── os_hid.rs
│   └── web_hid.rs
└── mod.rs

// api/hid/mod.rs
pub mod hid_api;

// api/hid/hid_api.rs
#[cfg(not(target_arch = "wasm32"))] 
#[path ="os_hid.rs"] mod platform_hid;
#[cfg(target_arch = "wasm32")] 
#[path ="web_hid.rs"] mod platform_hid;

// api/mod.rs
pub mod hid;

In v2.0.0-dev.37 it works fine.
But when I upgrade to v2.0.0-dev.38 this error occurred

src\frb_generated.rs:24:27 
use crate::api::hid::hid_api::platform_hid::*;
                              ^^^^^^^^^^^^ private module

I tried making the following changes and it worked,
but platform_hid doesn't need to expose any member to flutter.
So I think it's not a right way to do it.

// api/hid/hid_api.rs
#[cfg(not(target_arch = "wasm32"))] 
#[path ="os_hid.rs"] pub mod platform_hid;
#[cfg(target_arch = "wasm32")] 
#[path ="web_hid.rs"] pub mod platform_hid;

Much thanks for any helps.

[fzyzcjy]

Looks like a bug due to refactor of dev.38 to support scanning third party crates. Could you please provide a minimal reproducible sample and create an issue, then I can fix that.

Without more info, I guess maybe it is because you have some function that points to this, or more possibly, do you have pub functions inside that mod? That may confuse it.
If that's the problem, I may update it to skip private mods.

EDIT: It worked before possibly because frb did not handle #[path=...], thus the mod is as if nothing to old frb.

EDIT: Another way may be https://cjycode.com/flutter_rust_bridge/guides/miscellaneous/multi-input modify rust_input to only scan the folders you like.

[svr2kos2]

With a new flutter_rust_bridge_codegen project
add api/internal_mod.rs

pub fn internal_hello() {
    println!("Hello from internal_mod.rs!");
}

add api/external_mod.rs

#[path ="internal_mod.rs"] mod internal_hello;
pub fn external_hello() {
    println!("Hello from external_mod.rs!");
    internal_hello::internal_hello();
}

modify api/mod.rs

pub mod simple;
pub mod external_mod;

flutter_rust_bridge_codegen generate and build(web or windows) then get

error[E0603]: module `internal_hello` is private
   --> src\frb_generated.rs:103:51
    |
103 |                         crate::api::external_mod::internal_hello::internal_hello();        
    |                                                   ^^^^^^^^^^^^^^  -------------- function `internal_hello` is not publicly re-exported
    |                                                   |
    |                                                   private module

As a beginner, I'm not sure if this is the wrong way to use internal code or a bug.
But I found that I can use this way to avoid this by changing internal_mod.rs to:

pub(in crate::api) fn internal_hello() {
    println!("Hello from internal_mod.rs!");
}

[fzyzcjy]

For future readers: #2074