ESLint Runner

As of ESLint v5 a breaking behaviour change (8b7c6ea) was introduced where a fatal error is thrown if any file pattern returns no files. We would like to use a generic linting implementation on all our component monorepos without having to turn JS linting on/off depending on the presence of Javascript.

This small utility will check for the existence of Javascript files in a repo and then run an npm script command if any are found. The npm script should run your eslint setup.

Install

$ npm install @springernature/util-eslint-runner

Installing util-eslint-runner adds command line exectuables to ./node_modules/.bin/.

Usage

$ ./node_modules/.bin/util-eslint-runner [options]

Options:
  -n --name [string]     NPM script to execute (default: null)
  -p --pattern [string]  Glob pattern to search (default: **/*.js)
  -h, --help             output usage information

.eslintignore

ESLint runner will check for an .eslintignore file, and ignore any patterns it finds.

Example

You always need to specify the --name option, otherwise nothing will run on completion. The default search pattern is **/*.js, which you can override with the --pattern option. Some examples using different options

$ util-eslint-runner --name 'lint-js'
$ util-eslint-runner -n 'lint-js'
$ util-eslint-runner --name 'lint-js' --pattern 'packages/**/*.js'
$ util-eslint-runner -n 'lint-js' -p 'packages/**/*.js'

Example monorepo script setup

Below is an example set of example scripts from a monorepo package.json file:

"scripts": {
  "lint": "util-eslint-runner -n 'lint-js' -p 'packages/**/*.js' && npm run lint-sass",
  "lint-sass": "sass-lint 'packages/**/*.scss'",
  "lint-js": "eslint 'packages/**/*.js'"
}

License

MIT License © 2018, Springer Nature