importer.js

const fs = require('fs');
const mappings = require('./mappings');

function doId(path, token) {
    if (!mappings[token]) {
        console.log(`Cannot find ${token} mappings file.`);
        process.exit(1);
    }
    const contents = mappings[token] + '\n' +
        fs.readFileSync(path, 'utf-8');
    fs.writeFileSync(path, contents);
}

const myArgs = process.argv.slice(2);

if (myArgs.length !== 2) {
    console.log('usage: boo <path> <token>');
    process.exit(1);
}

const [path, token] = myArgs;

doId(path, token);