css/script/happy-new-year

#!/usr/bin/env node
const fs = require('fs-extra')
const globby = require('globby')
const {join} = require('path')

const {packages} = require('../lerna.json')
const year = process.argv.slice(2)[0] || (new Date()).getFullYear()
const yearRegex = /Copyright \(c\) (20\d\d) GitHub/

if (module.parent) {
  module.exports = happyNewYear
} else {
  happyNewYear()
}

function happyNewYear() {
  return getPackageGlobs('{LICENSE,*.scss,lib/**/*.scss}')
    .then(paths => paths.map(path => {
      return fs.readFile(path, 'utf8')
        .then(source => {
          const match = source.match(yearRegex)
          if (match && match[1] != year) {
            const replaced = source.replace(yearRegex, (substr, y) => {
              console.warn(`updating year in ${path} from ${y} to ${year}`)
              return substr.replace(y, year)
            })
            return fs.writeFile(path, replaced, 'utf8')
          }
        })
    }))
}

function getPackageGlobs(glob) {
  return globby(packages.map(pkg => join(pkg, glob)))
}