Mailspring/sync/app.js

const path = require('path');

global.__base = path.join(__dirname, '..')
global.config = require(`${__base}/core/config/${process.env.ENV || 'development'}.json`);
global.Promise = require('bluebird');

const DatabaseConnectionFactory = require(`${__base}/core/database-connection-factory`)
const SyncWorkerPool = require('./sync-worker-pool');
const workerPool = new SyncWorkerPool();

DatabaseConnectionFactory.setup()
DatabaseConnectionFactory.forShared().then((db) => {
  const {Account} = db
  Account.findAll().then((accounts) => {
    accounts.forEach((account) => {
      workerPool.addWorkerForAccount(account);
    });
  });
});

global.workerPool = workerPool;