buildAppConfig.js

#!/usr/bin/env node

'use strict'

var fs = require('fs')
var shell = require('shelljs')

var getCommitHash = function () {
  // exec git command to get the hash of the current commit
  // git rev-parse HEAD

  var hash = shell.exec('git rev-parse HEAD', {
    silent: true
  }).output.trim().substr(0, 7)
  return hash
}

var commitHash = getCommitHash()

var appConfig = JSON.parse(fs.readFileSync('./appConfig.json', 'utf8'))
var pkg = JSON.parse(fs.readFileSync('./package.json', 'utf8'))

console.log('v' + pkg.version + ' #' + commitHash + ' App:' + appConfig.name)

var content = 'window.version="' + pkg.version + '";'
content = content + '\nwindow.commitHash="' + commitHash + '";'

content = content + '\nwindow.appConfig=' + JSON.stringify(appConfig) + ';'
fs.writeFileSync('./src/js/appConfig.js', content)