example.main.js

const { app, BrowserWindow, dialog } = require('electron');
const path = require('path');

const isDev = !app.isPackaged;

if (isDev) {
  process.env.NODE_CONFIG_DIR = path.join(__dirname, 'config');
} else {
  process.env.NODE_CONFIG_DIR = path.join(process.resourcesPath, 'config');
}

process.env.NODE_ENV = 'production';

const consoleLogger = createBufferedConsoleLogger();

function createBufferedConsoleLogger() {
  const buffer = [];

  return {
    fatal(...args) {
      buffer.push({ level: 'fatal', args });
      console.error(...args);
    },
    error(...args) {
      buffer.push({ level: 'error', args });
      console.error(...args);
    },
    warn(...args) {
      buffer.push({ level: 'warn', args });
      console.warn(...args);
    },
    info(...args) {
      buffer.push({ level: 'info', args });
      console.info(...args);
    },
    debug(...args) {
      buffer.push({ level: 'debug', args });
      console.debug(...args);
    },
    trace(...args) {
      buffer.push({ level: 'trace', args });
      console.log(...args);
    },

    writeBufferInto(output) {
      for (const { level, args } of buffer) {
        output[level](...args);
      }
    },
  };
}


let mainWindow;
let updater;

function initializeUpdateListener(updatesActions) {
  const { ipcRenderer } = require('electron');

  ipcRenderer.on('show-update-dialog', (_, dialogType, options = {}) => {
    updatesActions.showUpdateDialog(dialogType, options);
  });
}

const createWindow = () => {
  mainWindow = new BrowserWindow({
    width: 800,
    height: 600,
    webPreferences: {
      preload: path.join(__dirname, 'preload.js'),
    },
  });

  mainWindow.loadFile('index.html');
  mainWindow.webContents.openDevTools();

  updater.start({
    canRunSilently: true,
    getMainWindow,
    logger: consoleLogger,
  });
};

function getMainWindow() {
  return mainWindow;
}

function getApp() {
  try {
    return app;
  } catch {
    return null;
  }
}

app.whenReady().then(async () => {

  updater = require('safeupdater');

  createWindow();

  try {
    await updater.start({
      canRunSilently: true,
      getApp,
      getMainWindow,
      logger: consoleLogger,
    });
  } catch (err) {
    consoleLogger.error('Updater failed to start', err);
  }
});

app.on('window-all-closed', () => {
  app.quit();
});

module.exports = {
  initializeUpdateListener,
};