index.js

// Load all the urls from redirects.yml
const YAML = require('yaml')

// Read redirects files
const fs = require('fs')
const path = require('path')

const redirectsFile = fs.readFileSync(path.join(__dirname, 'redirects.yml'), 'utf-8')
console.log(redirectsFile)

//Parse YAML
const redirects = YAML.parse(redirectsFile)

console.log(redirects)

// Generate an html page for each redirect url from template.html
const templateHTML = fs.readFileSync(path.join(__dirname, 'template.html'), 'utf-8')

// Loop through all url redirects, and generate an html page
for (let [slug, url] of Object.entries(redirects)) {
    console.log('Generating HTML Page for ', slug)
    const html = templateHTML.replaceAll('https://example.com', url)

    // Create folder for each slug
    const folderPath = path.join(__dirname, 'out', slug)
    fs.mkdirSync(folderPath, { recursive: true })

    // Create an index.html in each slug directory
    fs.writeFileSync(path.join(folderPath, 'index.html'), html)
}