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CONTRIBUTING.md

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Working on your first Pull Request? You can learn how from this free series How to Contribute to an Open Source Project on GitHub

Contributing to the docs

Documentation uses Sphinx and reStructuredText. Source inside the docs directory.

  1. Go to the docs directory

  2. Run pipenv install to setup Python environemnt (requires Python 3.6). If you encounter ValueError('unknown locale: %s' % localename), run export LC_ALL=en_US.UTF-8 && export LANG=en_US.UTF-8 and try again.

  3. Run pipenv run make livehtml to build the docs, watch for changes and preview documentation locally at http://127.0.0.1:8000.

  4. It's also possible to run pipenv run make html for single build. Incremental builds are much faster than the first one as only changed files are built.

Contributing the code

This project uses yarn package manager. Please follow official docs to install it.

Setup local environment

  1. Clone project

    git clone https://github.com/lingui/js-lingui.git
cd js-lingui

  2. Install development packages. This project uses yarn workspaces instead of Lerna, so running yarn installs all development packages and also dependencies for all workspaces (inside packages/*).

    yarn

  3. Run tests

    # Watch mode
yarn watch

# Single run
yarn test

    NOTE: if you are using an IDE to run test make sure to use the right Jest config. For unit tests use -c scripts/jest/config.unit.js. Integration tests use build packages (created using yarn release:build) and config -c scripts/jest/config.integration.js. See package.json for more info.

    If you run tests manually instead of using yarn watch or yarn test commands and your tests fail due to missing locale data (typically you'll get wrong number and currency formating) make sure you have NODE_ICU_DATA variable set: NODE_ICU_DATA=node_modules/full-icu.

Using development version in your project

After you successfully fix a bug or add a new feature, you most probably want to test it in your project as soon as possible.

jsLingui uses verdaccio, a lightweight local NPM registry, to install local build of packages in examples. You can do the same in your project:

  1. Run verdaccio locally in docker (follow verdaccio guide if you don't want to run it in Docker):

    docker run -d -it --rm --name verdaccio -p 4873:4873 verdaccio/verdaccio

  2. Publish local build of packages to registry. Run release script with --dev flag:

    yarn release --dev

  3. Inside your project, run yarn install @lingui/package@next to install pre-release of packages.

  4. After you make some changes, you need to run yarn release --dev and then yalc upgrade inside your project.

Finalize changes

Please make sure that all tests pass and linter doesn't report any error before submitting a PR (Don't worry though! If you can't figure out the problem, create a PR anyway and we'll help you).

  • yarn lint - Linting
  • yarn test - Quick test suite (sufficient)
  • yarn release:test - Full test suite (recommended)

yarn release:test builds all packages, simulates creating packages for NPM, runs unit tests and finally runs integration tests using production build.

Note: Don't commit scripts/build/results.json created by yarn release:test.

Now you can create PR and let CI service do their work!

If you need any help, just raise an issue or submit an working draft of PR.