ESLint Config

Encoura's preferred configs for TypeScript, Prettier, ESLint, CommitLint, and MarkdownLint.

Getting Started

Install this package, husky, and lint-staged as dev dependencies:

npm install --save-dev @encoura/eslint-config husky lint-staged

Configure husky by adding the following to your package.json file:

...
"scripts": {
  ...
  "prepare": "husky",
  ...
},
...

Configure CommitLint

To configure CommitLint, create a commitlint.config.js file in the root of your project that contains the following:

module.exports = require('@encoura/eslint-config/commitlint.config');

This will allow CommitLint to discover the configuration this repository provides from within your node_modules folder.

By default the Encoura commitlint expects a commit message in the following format:

[XXX-###]: Subject where XXX-### is a jira ticket id, e.g., E4E-1

The commit message may also be in the form of git's standard merge commit format.

Configure ESLint

To configure ESLint, add the following to your .eslintrc.js and package.json files. This will allow ESLint to discover the configuration this repository provides from within your node_modules folder, and will check your *.js, *.ts, and *.tsx files for infractions every time you create a new commit:

module.exports = {
  extends: [
    // For front-end (React / Next.js) projects:
    '@encoura/eslint-config'
    // For back-end (Nest.js) projects:
    '@encoura/eslint-config/nest'
  ]
  ...
  // Add any custom rules/plugins/configuration here
}

...
"lint-staged": {
  ...
  "*.{js,jsx,ts,tsx}": "eslint",
  ...
},
...

Configure MarkdownLint

To configure MarkdownLint, add the following to your package.json file. This will allow MarkdownLint to discover the configuration this repository provides from within your node_modules folder, and will check your *.md files for infractions every time you create a new commit:

...
"lint-staged": {
  ...
  "*.{md}": "markdownlint --config node_modules/@encoura/eslint-config/markdownlint.config.json",
  ...
},
...

Configure Prettier

To configure prettier, create a .prettierrc.js file in the root of your project that contains the following:

module.exports = require('@encoura/eslint-config/prettier.config');

This will allow Prettier to discover the configuration this repository provides from within your node_modules folder.

Next, add the following to your package.json file so that prettier will check your files for infractions every time you create a new commit:

...
"lint-staged": {
  ...
  "*.{js,jsx,json,md,ts,tsx}": [
    "prettier --write",
    "git add"
  ]
  ...
},
...

Configure TypeScript

To configure TypeScript, add the following to your tsconfig.json file. This will allow TypeScript to discover the configuration this repository provides from within your node_modules folder:

...
"extends": "node_modules/@encoura/eslint-config/tsconfig.json",
...

Local Development

npm Scripts

There are several npm scripts at your disposal during local development. Here are some of the more important ones:

Script	Description
npm test	Run all tests.

Release Process

When your code changes are ready, it's time to publish a new patch, minor, or major release.

1. Make a PR (or mark your draft PR as ready for review).

2. Annotate your PR with the necessary context to let Semantic Release know if this should yield a new patch, minor, or major release:

   • If you expect the merging of your PR to result in a new patch release, start your PR title with fix:.
   • If you expect the merging of your PR to result in a new minor release, start your PR title with feat:.
   • If you expect the merging of your PR to result in a new major release, see #3 below for details.
   • If you expect the merging of your PR to skip the creation of a new release, you can start your PR title with build: (for build changes), chore: (for basic maintenance), docs: (for documentation updates), or simply do not use any of the above keyword prefixes.

3. If the pull request should create a new major version release, the string BREAKING CHANGE: must be included in at least one commit message's footer (see docs) — Semantic Release's commit analyzer does not use the PR title in determining major releases.

   You can either manually add BREAKING CHANGE: to the commit footer after pressing "Merge Pull Request"/"Squash and Merge" in your PR (in the "optional extended description" field). Alternatively, if you're merging the PR by creating a new merge commit, ensure that at least one of the source commits' messages has BREAKING CHANGE: in its footer. Note that to accomplish this you may need to commit with the --no-verify flag to bypass commitlint.

4. Once your PR is merged, Semantic Release will pick it up and initiate the automated release process. If it detects that it should create a release (based on the above), it will. Otherwise, it won't!