esnext-scripts/lib/helpers.js

const fs = require('fs')
const path = require('path')
const pkgConf = require('pkg-conf')
const execa = require('execa')
const symbols = require('log-symbols')
const consts = require('./consts')

const pkg = require('../package.json')
const debug = require('debug')(pkg.name)

const info = message => exports.debug(`${symbols.info} ${message}`)
const success = message => exports.debug(`${symbols.success} ${message}`)
const warning = message => exports.debug(`${symbols.warning} ${message}`)
const error = message => exports.debug(`${symbols.error} ${message}`)

/**
 * Execute system command.
 *
 * @param {string} cmd - command to be executed
 * @param {array} args - list of command arguments.
 * @param {object} options - command options.
 */
const execute = (cmd, ...args) =>
  execa.sync(cmd, [...args], Object.assign({ stdio: 'inherit' }))

/**
 * Fetch settings from given file name (.js) and package.json#namespace.
 * 1. If file with the given name found, simply require it & return its values.
 * 2. If file not found, return package.json#namespace values.
 * 3. If namespace it also missing, return {}.
 * @param {String} [options.filename] - file to read under `cwd`.
 * @param {String} [options.namespace] - namespace to lookup in package.json under `cwd`.
 **/
const readSettings = async (options = {}) => {
  let settings = {}
  const cwd = options.cwd || consts.cwd
  const { filename, namespace } = options
  const config = filename ? path.resolve(cwd, filename) : null

  if (config && fs.existsSync(config)) {
    settings = require(config) // eslint-disable-line
  } else if (namespace) {
    settings = await pkgConf(namespace)
  }

  return settings
}

module.exports = {
  pkg,
  debug,
  info,
  success,
  warning,
  error,
  execute,
  readSettings
}