"tsc: Failed to build definition files." in specific circumstances

[hassankhan]

Generating and using a module works within the example app seems to work fine because the snippets in Step 5 import TypeScript directly.

However, this approach presents problems when trying to make use of the Rust module in a separate app (i.e. installing the module with npm i ../<PATH_TO_RUST_MODULE>).

Found 54 errors in 10 files.

Errors  Files
     2  node_modules/uniffi-bindgen-react-native/typescript/src/async-callbacks.ts:25
     1  node_modules/uniffi-bindgen-react-native/typescript/src/async-rust-call.ts:15
     1  node_modules/uniffi-bindgen-react-native/typescript/src/callbacks.ts:36
     1  node_modules/uniffi-bindgen-react-native/typescript/src/enums.ts:7
     1  node_modules/uniffi-bindgen-react-native/typescript/src/errors.ts:41
     5  node_modules/uniffi-bindgen-react-native/typescript/src/ffi-converters.ts:66
     3  node_modules/uniffi-bindgen-react-native/typescript/src/objects.ts:16
     1  node_modules/uniffi-bindgen-react-native/typescript/src/rust-call.ts:14
     1  src/generated/foobar-ffi.ts:300
    38  src/generated/foobar.ts:4
✖ Failed to build definition files.

The errors above are caused by two issues:

• Generated files being type-checked (Prevent TypeScript from checking generated files for errors #197)
• uniffi-bindgen-react-native TypeScript source provided as-is without compiling to JavaScript (Compile TypeScript to JavaScript before publishing to npm #198)

I've opened draft PRs for both issues, would love to get feedback on them.

[bjtrounson]

I think we have hit this issue as well with the Ferrostar RN binding we are trying to split up the project so you can import the core and views separately, we have made the uniffi-bindgen-react-native project separate as well but keep hitting these typescript errors when building the definitions.

I've been working on it here under the react-native folder stadiamaps/ferrostar#463