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CONTRIBUTING.md

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Contributing Guide

Pull Request Guidelines

  • Never push anything to ot-builder repository directly.
  • Create your fork and make pull requests.
  • Make sure npm test passes. We have automation to ensure all the tests passes.
  • Make sure you have change files included. Create them with npm run change.
  • If you are implementing a new feature (like supporting a new table), add unit tests.

Development Environment Setup

Verify Your Environment Works

  • Run node -v to check your Node.JS version. It should be 12.x.x or newer.
  • Run npm -v to check your NPM version. If your version is below 5.x.x, run npm install -g [email protected] (literal "x" characters here) to update it.
  • Go to a folder and run code . to open the folder in VS Code. If you don't have VS Code in your path, you can open VS Code and press F1 or ctrl+shift+P (cmd+shift+P), type path, and select the Install 'code' command in PATH option.
  • Run git --version to make sure you have Git installed.

Making Changes – Source

  • Create a new branch to work with. Do not use master.

  • Create an initial build:

    • npm run init to install the dependencies and set everything up.
    • npm run build to create the initial build.

  • Make your changes:

    • Use npm run watch to start background building.

      • If you have Visual Studio Code and AutoLaunch plugin installed, it will run this at background so you could have automatic background building.

    • If you implemented a new feature (like supporting a new Table), add unit tests.

    • If you added a new package or changed the dependency, run npm run rebuild to create a new build.

      • Make sure that you terminated all watch background tasks (including Visual Studio Code session that has npm run watch running in background) before running it.

    • Run npm test to validate your change.

  • Make a pull request:

    • Run npm run change to create change files. The change files will decide the version of next publish and create change logs automatically.
    • Run npm run lint to check your code style.
    • Send pull request to ot-builder repository.

Project Structure

  • .github: Configuration for GitHub automation.
  • .vscode: Configuration for Visual Studio Code plugins.
  • change: Collected change files. It will be cleared when a new version is published.
  • doc: The documentations.
  • packages: The source code packages.
    • Unit tests are also here, lies side-by-side with the source code. The unit tests are named in *.test.ts pattern and uses Jest to test them.
    • The ft-* packages defines the data type of OpenType structures, usually tables.
    • The io-bin-* packages defines the procedure of reading and writing OpenType binaries for the corresponded ft-* types.
    • The test-util package contains utility functions for writing unit tests, including functions to compare font data structures. Introduce it as a dev-dependency of the packages need it – usually font IO packages or font manipulation packages.
  • scripts: The utility scripts used for building this repository.
  • test-fonts: The fonts used for testing.