eslint-config-scratch
Shareable ESLint config for Scratch
Last updated 3 years ago by scratch .
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Scratch ESLint config

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eslint-config-scratch defines the eslint rules used for Scratch Javascript projects

Installation

Install the config along with its peer dependencies, eslint and babel-eslint.

npm install -D eslint-config-scratch eslint@3 babel-eslint@7

If you're using the React config, also install the dependency for that

npm install -D eslint-plugin-react@6

Usage

The configuration is split up into several modules:

  • scratch: The base configuration. Always extend this.
  • scratch/node: Rules for node, e.g., server-side code, tests, and scripts
  • scratch/es6: Rules for ES6, for use when you're transpiling with webpack
  • scratch/react: Rules for React projects

Usually web projects have a mix of node and web environment files. To lint both with the appropriate rules, set up a base .eslintrc.js with the rules for node and then override the node configuration in src (where web code usually lives). E.g., with a file structure like this:

scratch-project
- .eslintrc.js
- package.json
- src
  - .eslintrc.js
  - index.js

Your config files should be set up like

// scratch-project/.eslintrc.js
module.exports = {
    extends: ['scratch', 'scratch/es6', 'scratch/node']
};

// scratch-project/src/.eslintrc.js
module.exports = {
    root: true,
    extends: ['scratch', 'scratch/es6', 'scratch/react'],
    env: {
        browser: true
    }
};

This will set up all the files in the project for linting as Node.js by default, except for those in src/, which will be linted as ES6 and React files.

If you're linting React, also make sure your lint script lints .jsx files:

"scripts": {
    "lint": "eslint . --ext .js,.jsx"
}

Committing

This project uses semantic release to ensure version bumps follow semver so that projects using the config don't break unexpectedly.

In order to automatically determine the type of version bump necessary, semantic release expects commit messages to be formatted following conventional-changelog.

<type>(<scope>): <subject>
<BLANK LINE>
<body>
<BLANK LINE>
<footer>

subject and body are your familiar commit subject and body. footer is where you would include BREAKING CHANGE and ISSUES FIXED sections if applicable.

type is one of:

  • fix: A bug fix Causes a patch release (0.0.x)
  • feat: A new feature Causes a minor release (0.x.0)
  • docs: Documentation only changes
  • style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
  • refactor: A code change that neither fixes a bug nor adds a feature
  • perf: A code change that improves performance May or may not cause a minor release. It's not clear.
  • test: Adding missing tests or correcting existing tests
  • ci: Changes to our CI configuration files and scripts (example scopes: Travis, Circle, BrowserStack, SauceLabs)
  • chore: Other changes that don't modify src or test files
  • revert: Reverts a previous commit

Use the commitizen CLI to make commits formatted in this way:

npm install -g commitizen
npm install

Now you're ready to make commits using git cz.

Breaking changes

If you're committing a change that makes the linter more strict, or will otherwise require changes to existing code, ensure your commit specifies a breaking change. In your commit body, prefix the changes with "BREAKING CHANGE: " This will cause a major version bump so downstream projects must choose to upgrade the config and will not break the build unexpectedly.

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