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CONTRIBUTING.md

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Contributing

Contributions are always welcome, no matter how large or small!

Development workflow

This project is a monorepo managed using Yarn workspaces. It contains the following packages:

  • The library package in the root directory.
  • An example app in the example/ directory.
  • The code generator package in the protoc-generator/ directory.

To get started with the project, run yarn in the root directory to install the required dependencies for each package:

yarn

Most files are generated using the protoc plugin in the protoc-generator folder, and they're tagged with a notice in the top.

In order to generate these files, you need protoc installed and in your PATH.

You also need Deno installed.

Once you have protoc, run yarn generate-bindings in the root directory.

Since the project relies on Yarn workspaces, you cannot use npm for development.

The example app demonstrates usage of the library. You need to run it to test any changes you make.

It is configured to use the local version of the library, so any changes you make to the library's source code will be reflected in the example app.

To make changes to the C++ and Typescript code, you can either editor the generated files in cpp/ and src/ respectively. You you will then need to make the same changes in protoc-generator/. You can also just directly edit the generator if it's a smaller change.

You can use various commands from the root directory to work with the project.

To start the packager:

yarn example start

To run the example app on Android:

yarn example android

To run the example app on iOS:

yarn example ios

To confirm that the app is running with the new architecture, you can check the Metro logs for a message like this:

Running "TurboLndExample" with {"fabric":true,"initialProps":{"concurrentRoot":true},"rootTag":1}

Note the "fabric":true and "concurrentRoot":true properties.

Make sure your code passes TypeScript and ESLint. Run the following to verify:

yarn typecheck
yarn lint

To fix formatting errors, run the following:

yarn lint --fix

Remember to add tests for your change if possible. Run the unit tests by:

Linting and tests

ESLint, Prettier, TypeScript

We use TypeScript for type checking, ESLint with Prettier for linting and formatting the code, and Jest for testing.

Our pre-commit hooks verify that the linter and tests pass when committing.

Publishing to npm

We use release-it to make it easier to publish new versions. It handles common tasks like bumping version based on semver, creating tags and releases etc.

To publish new versions, run the following:

yarn release

Scripts

The package.json file contains various scripts for common tasks:

  • yarn: setup project by installing dependencies.
  • yarn typecheck: type-check files with TypeScript.
  • yarn lint: lint files with ESLint.
  • yarn test: run unit tests with Jest.
  • yarn example start: start the Metro server for the example app.
  • yarn example android: run the example app on Android.
  • yarn example ios: run the example app on iOS.
  • yarn generate-bindings: Generates C++ and Typescript code for the cpp and src folders.

Sending a pull request

Working on your first pull request? You can learn how from this free series: How to Contribute to an Open Source Project on GitHub.

When you're sending a pull request:

  • Prefer small pull requests focused on one change.
  • Verify that linters and tests are passing.
  • Review the documentation to make sure it looks good.
  • Follow the pull request template when opening a pull request.
  • For pull requests that change the API or implementation, discuss with maintainers first by opening an issue.