starter script to restart electron on main process file change

watch.js

const { spawn } = require('child_process')
const chokidar = require('chokidar')
const chalk = require('chalk')

const paths = ['./src/main.js']

let child
let wait = false

spawnElectron()

chokidar.watch(paths).on('change', path => {
  if (!wait) {
    log(`${path} changed. restarting`)
    child.kill()
    wait = setTimeout(() => {
      spawnElectron()
      wait = null
    }, 200)
  }
})

function spawnElectron() {
  const args = ['electron', '.', ...process.argv.slice(2)]
  log()
  child = spawn('npx', args, {
    cwd: __dirname,
    stdio: 'inherit',
  })
}

function log(...args) {
  console.info(chalk.magenta('[dev.js]'), ...args)
}