.commitlintrc.js

const Path = require('path')
const importFrom = require('import-from')
const resolvePkg = require('resolve-pkg')
const semver = require('semver')

module.exports = {
  utils: { getPackages },
  extends: [
    '@commitlint/config-conventional',
    '@commitlint/config-lerna-scopes',
  ],
  rules: {
    'body-max-length': [0],
    'footer-max-length': [0],
    'header-max-length': [0],
    'scope-enum': ctx =>
      getPackages(ctx).then(packages => [
        2,
        'always',
        packages.concat(['deps', 'deps-dev', 'ci', 'devops', 'release']),
      ]),
  },
}

function getPackages(context) {
  return Promise.resolve()
    .then(() => {
      const ctx = context || {}
      const cwd = ctx.cwd || process.cwd()
      const lernaVersion = getLernaVersion(cwd)

      if (semver.lt(lernaVersion, '3.0.0')) {
        const Repository = importFrom(cwd, 'lerna/lib/Repository')
        const PackageUtilities = importFrom(cwd, 'lerna/lib/PackageUtilities')

        const repository = new Repository(cwd)
        return PackageUtilities.getPackages({
          packageConfigs: repository.packageConfigs,
          rootPath: cwd,
        })
      }

      const Project = importFrom(cwd, '@lerna/project')
      const project = new Project(cwd)
      return project.getPackages()
    })
    .then(packages => {
      return packages
        .map(pkg => pkg.name)
        .map(name => (name.charAt(0) === '@' ? name.split('/')[1] : name))
    })
}

function getLernaVersion(cwd) {
  return require(Path.join(resolvePkg('lerna', { cwd }), 'package.json'))
    .version
}