eslint-config-expensify

This package provides Expensify's .eslintrc as an extensible shared config. Most of our rules are based on Airbnb's style guide.

How to Develop

1. You only need to make a PR with the changes. There is no need to bump the version in package.json file in your PR. A github action will automatically bump the version and publish the package to npm after PR is merged. `

Testing

After you have submitted a PR,

1. Get the full commitID of the last commit in your PR, and run npm install git+https://github.com/Expensify/eslint-config-expensify.git#COMMIT_ID in the repo against which you want to test those changes.
2. This should update the resolved path of eslint-config-expensify in package-lock.json file, and ensures the repo is referencing to the correct local version of the eslint config.
3. Now, you can run npm run lint or perform any other tests you want in that repo.

After PR is merged

You need to publish the newest version of this to NPM so that we can update it in the other repos

1. From the command line, in the directory for this repo:
2. Run npm login
3. Enter username: 'expensify'
4. Enter password: this is in 1Password for npmjs.com
5. Enter the email: [e-mail]
6. Ask for the 2FA code in #infra (feel free to ping @ring0 if you don't get a timely response)
7. Run npm publish
8. Go into the App, Web-Expensify and Web-Secure repos and run npm install eslint-config-expensify@latest. This should update the package.json and package-lock.json file and you can submit a PR with those changes.

Note as of now we have no way of testing these PRs without a separate App, Web or Web Secure PR

Usage

We export two ESLint configurations for your usage.

eslint-config-expensify

Our default export contains all of our ESLint rules, including ECMAScript 6+ and React. It requires eslint, eslint-plugin-import, eslint-plugin-react, and eslint-plugin-jsx-a11y.

Just add extends: 'expensify' to the .eslintrc file in the root directory of your project.

eslint-config-expensify/legacy

Just add extends: 'expensify/legacy' to the .eslintrc file in the root directory of your project.

Style Guide

Feel free to also check out our Javascript style guide, our general language-agnostic coding standards, and the ESlint config docs for more information.