Function ifFile

src/utils.js:67–68

(files, t, f)

const toPOSIX = p => p.split(path.sep).join(path.posix.sep)
const hasFile = (...p) => fs.existsSync(fromRoot(...p))
const ifFile = (files, t, f) =>
  arrify(files).some(file => hasFile(file)) ? t : f

const hasPkgProp = props => arrify(props).some(prop => has(pkg, prop))