scratch-l10n/scripts/build-i18n-src.js

#!/usr/bin/env node

const fs = require('fs')
const glob = require('glob')
const path = require('path')
const mkdirp = require('mkdirp')

var args = process.argv.slice(2)

if (!args.length) {
  process.stdout.write('You must specify the messages dir generated by babel-plugin-react-intl.\n')
  process.exit(1)
}

const MESSAGES_PATTERN = args.shift() + '/**/*.json'

if (!args.length) {
  process.stdout.write('A destination directory must be specified.\n')
  process.exit(1)
}

const LANG_DIR = args.shift()

// Aggregates the default messages that were extracted from the example app's
// React components via the React Intl Babel plugin. An error will be thrown if
// there are messages in different components that use the same `id`. The result
// is a chromei18n format collection of `id: {message: defaultMessage,
// description: description}` pairs for the app's default locale.
const defaultMessages = glob
  .sync(MESSAGES_PATTERN)
  .map(filename => fs.readFileSync(filename, 'utf8'))
  .map(file => JSON.parse(file))
  .reduce((collection, descriptors) => {
    descriptors.forEach(({ id, defaultMessage, description }) => {
      if (Object.prototype.hasOwnProperty.call(collection, id)) {
        throw new Error(`Duplicate message id: ${id}`)
      }

      collection[id] = { message: defaultMessage, description: description }
    })

    return collection
  }, {})

mkdirp.sync(LANG_DIR)
fs.writeFileSync(path.join(LANG_DIR, 'en.json'), JSON.stringify(defaultMessages, null, 2))