post build script for create-react-app to move the js to a dist folder

postbuild.js

// Taken almost verbatim from https://gist.github.com/bfocht/a0def4432d0f93dc28bc7cf64ebe8be1

// copy the just-built js code into the place weathermap/cacti expect to find it

const fs = require('fs');
const src = './build/';
const dest = '../../cacti-resources/user/';

const targets = ["main.js", "main.css"];

for (let target of targets) {

    let file = require('./build/asset-manifest.json')[target];
    console.log(`${src}${file} => ${dest}${target}`);

    if (!fs.existsSync(dest)) {
        fs.mkdirSync(dest);
    }

    if (fs.existsSync(dest + target)) {
        fs.unlinkSync(dest + target);
    }

  // took out the map-stripping, but kept the read/write (vs copy) so that similar processing is easy to add
    fs.readFile(src + file, 'utf8', (err, data) => {
        if (err) {
            console.log('Unable to read file from manifest.');
            process.exit(1);
        }
        fs.writeFileSync(dest + target, data);
    });
}