generate_index_html.js

import fs from 'fs'
import path from 'path'
import config from '../constants/config.js'

const fs = require('fs')
const template_dir = path.resolve(__dirname, '../public')
const template_file = 'index.html'
const version = config.version.replace(/\./g, '')

fs.readFile(path.resolve(template_dir, template_file), 'utf8', (err, data) => {
    if (err) return console.log(`Error while reading ${template_file}`)

    const new_html = data.replace('bundle.js', `bundle_${version}.js`)
    const new_html_file_name = `index_${version}.html`
    fs.writeFile(`${template_dir}/${new_html_file_name}`, new_html, (err) => {
        if (err) return console.log(`Error while writing ${new_html_file_name}`)
        console.log(`GENERATED ${new_html_file_name}`)
    })
})