setup-events.js

const { app } = require('electron')

module.exports = {
	handleSquirrelEvent: function () {
		if (process.argv.length === 1) {
			return false
		}

		const ChildProcess = require('child_process')
		const path = require('path')

		const appFolder = path.resolve(process.execPath, '..')
		const rootAtomFolder = path.resolve(appFolder, '..')
		const updateDotExe = path.resolve(path.join(rootAtomFolder, 'Update.exe'))
		const exeName = path.basename(process.execPath)

		const spawn = function (command, args) {
			let spawnedProcess

			try {
				spawnedProcess = ChildProcess.spawn(command, args, { detached: true })
			} catch (error) {
				console.warn(error)
			}

			return spawnedProcess
		}

		const spawnUpdate = function (args) {
			return spawn(updateDotExe, args)
		}

		const squirrelEvent = process.argv[1]
		switch (squirrelEvent) {
			case '--squirrel-install':
			case '--squirrel-updated':
				// Optionally do things such as:
				// - Add your .exe to the PATH
				// - Write to the registry for things like file associations and
				//   explorer context menus
				// Install desktop and start menu shortcuts
				spawnUpdate(['--createShortcut', exeName])

				setTimeout(app.quit, 1000)
				break

			case '--squirrel-uninstall':
				// Undo anything you did in the --squirrel-install and
				// --squirrel-updated handlers
				// Remove desktop and start menu shortcuts
				spawnUpdate(['--removeShortcut', exeName])

				setTimeout(app.quit, 1000)
				break

			case '--squirrel-obsolete':
				// This is called on the outgoing version of your app before
				// we update to the new version - it's the opposite of
				// --squirrel-updated
				app.quit()
				break
		}
	}
}