Error generating bindings: No such file or directory (os error 2)

[Jomy10]

I am running into the following error:

Failed due to the following error:
Could not generate UniFFI bindings for udl files due to the following error:
 No such file or directory (os error 2)

Steps to reproduce:

├── Cargo.toml
├── build.rs
└── src
    ├── lib.rs
    └── lib.udl

Cargo.toml

[package]
name = "expression_interpreter"
version = "0.1.0"
edition = "2021"

[lib]
crate-type = ["staticlib", "lib"]
name = "expression_interpreter"

[dependencies]
uniffi = "0.28"

[build-dependencies]
uniffi = { version = "0.28", features = ["build"] }

build.rs

fn main() {
    uniffi::generate_scaffolding("./src/lib.udl").unwrap();
}

lib.rs

uniffi::include_scaffolding!("lib");

pub struct Executor {
}

impl Executor {
    pub fn new() -> Self {
        Executor {}
    }
}

lib.udl

namespace ExpressionInterpreter {};

interface Executor {
  constructor();
};

Full build output:

✗ cargo swift package -n ExpressionInterpreter -p macos
✔ Building target macOS
    cargo build --target x86_64-apple-darwin
    cargo build --target aarch64-apple-darwin
    mkdir -p target/universal-macos/debug
    lipo target/x86_64-apple-darwin/debug/libexpression_interpreter.a \
        target/aarch64-apple-darwin/debug/libexpression_interpreter.a -create -output \
        target/universal-macos/debug/libexpression_interpreter.a                                                                            x Generating Swift bindings...

Failed due to the following error:
Could not generate UniFFI bindings for udl files due to the following error:
 No such file or directory (os error 2)

More info

Lipo should have succeeded because the files are present:

✗ file target/x86_64-apple-darwin/debug/libexpression_interpreter.a
target/x86_64-apple-darwin/debug/libexpression_interpreter.a: current ar archive
✗ file target/aarch64-apple-darwin/debug/libexpression_interpreter.a
target/aarch64-apple-darwin/debug/libexpression_interpreter.a: current ar archive
✗ file target/universal-macos/debug/libexpression_interpreter.a
target/universal-macos/debug/libexpression_interpreter.a: Mach-O universal binary with 2 architectures: [x86_64:current ar archive] [arm64]
target/universal-macos/debug/libexpression_interpreter.a (for architecture x86_64):	current ar archive
target/universal-macos/debug/libexpression_interpreter.a (for architecture arm64):	current ar archive

[Jomy10]

After some more playing around, I found this error occurs because the Swift package name is not the same as the rust crate name defined in Cargo.toml.

[antoniusnaumann]

After some more playing around, I found this error occurs because the Swift package name is not the same as the rust crate name defined in Cargo.toml.

thanks for coming back and pointing this out. I'll see if there is an elegant fix here or at least a warning that clarifies this