node watch file change.js

node watch file change.js

const fs = require('fs');
const path = require('path');
const { exec } = require('child_process');

var ignores = '.git,doc,tool'.split(',')
var watchDir = '.'

function onFileUpdate() {
  console.log('onFileUpdate....................');
  // exec(`adb push `)
}

var watchMap = {}
var timer = 0

function watch(dir) {
  if (!fs.existsSync(dir)) { return }
  if (watchMap[dir]) { return }
  if (!fs.statSync(dir).isDirectory()) { return }
  watchMap[dir] = true
  fs.watch(dir, (event, filename)=> {
    if (ignores.includes(filename)) return
    if (event == 'rename') { watch(path.join(dir, filename)) }
    console.log('event: ' + event + ' filename:' + filename + ' time:' + Date.now());
    clearTimeout(timer)
    timer = setTimeout(()=>{onFileUpdate()}, 800)
  })

  fs.readdirSync(dir).forEach((file)=>{
    if (ignores.includes(file)) return
    watch(path.join(dir, file));
  })
}

watch(watchDir)
console.log('start watch...');
onFileUpdate()