phpengine/watcher.js

const fs = require('fs');
const {execSync} = require('child_process');

// this is for fix because the event fire twice
let twiceFix = false;

function compileAll(event, fname) {
  if (event == 'change' && twiceFix) {
    console.log(`${fname} as changed`);
    twiceFix = false;
    execSync('node build.js');
  }
  twiceFix = true;
}

console.log('Adding watcher for ui/css/omlink.scss');
fs.watch('ui/css/omlink.scss', function (event, fname) {
  compileAll(event, fname);
});

console.log('Adding watcher for ui/js/onlink.js');
fs.watch('ui/js/omlink.js', function (event, fname) {
  compileAll(event, fname);
});