为React-Intl提供json文件作为输入源，将其转换为在代码中defineMessages需要的对象

convertIntlJsonToObjectForDefineMessages.js

const fs = require('fs');
const readline = require('readline');

const writableStream = fs.createWriteStream('intl.js', {
    flags: 'w',
    autoClose: true
});

const rl = readline.createInterface({
  input: fs.createReadStream('en.json'),
  crlfDelay: Infinity
});

rl.on('line', (line) => {
  if(/[}{]/.test(line)) return;
  const result = line.split(":");
  let left, right;
  if(!result.length) return;
  left = result[0];
  if(result.length > 2) {
    right = result[1] + ":" + result[2];
  }
  if(result.length === 2) {
    right = result[1];
  }

  let key;
  const pointLoc = left.lastIndexOf(".");
  if(pointLoc === -1) key = left;
  key = left.substr(pointLoc + 1);
  writableStream.write(`${key}:{\n`);
  writableStream.write(`  id: ${left},\n`);
  writableStream.write(`  defaultMessage: ${right}\n`);
  writableStream.write(`},\n`);
});