feds-cli/lib/utils.js

CLI for Front-end Dev Stack

const CPU_COUNT = require('os').cpus().length
const HappyPack = require('happypack')
const notifier = require('node-notifier')
const chalk = require('chalk')
const humanizeString = require('humanize-string')

// This determines how many threads a HappyPack instance can spin up.
// See the plugins section of the webpack configuration for more.
const happyPackThreadPool = HappyPack.ThreadPool({ // eslint-disable-line new-cap
  size: CPU_COUNT >= 4
    ? Math.round(CPU_COUNT / 2)
    : 2
})

// Generates a HappyPack plugin.
// @see https://github.com/amireh/happypack/
function happyPackPlugin ({name, loaders}) {
  return new HappyPack({
    id: name,
    verbose: false,
    threadPool: happyPackThreadPool,
    loaders
  })
}

// :: [Any] -> [Any]
function removeEmpty (x) {
  return x.filter(y => !!y)
}

// :: bool -> (Any, Any) -> Any
function ifElse (condition) {
  return (then, or) => (condition ? then : or)
}

// :: ...Object -> Object
function merge () {
  const funcArgs = Array.prototype.slice.call(arguments) // eslint-disable-line prefer-rest-params

  return Object.assign.apply(
    null,
    removeEmpty([{}].concat(funcArgs))
  )
}

function createNotification (options = {}) {
  const title = options.title
    ? `${chalk.inverse.bold(` ${humanizeString(options.title).toUpperCase()} `)}`
    : undefined

  notifier.notify({
    title,
    message: options.message,
    open: options.open
  })

  const level = options.level || 'info'
  const msg = `${chalk.bold('==>')} ${title} -> ${options.message}`

  switch (level) {
    case 'warn':
      console.log(chalk.red(msg))
      break
    case 'error':
      console.log(chalk.bgRed.white(msg))
      break
    case 'info':
    default:
      console.log(chalk.green(msg))
  }
}

module.exports = {
  removeEmpty,
  ifElse,
  merge,
  happyPackPlugin,
  createNotification
}