Write JSON file from csv using Node.js

index.js

// given a csv file on the local filesystem, this program will JSON-serialize the contents in to a new file "output.json"
// First create a new directory and initialize a new node project:
// $ npm init -y && npm i -s csvtojson minimist
// Then run the program:
// $ node index.js -f path-to-csv.csv

const fs = require("fs");
const csv = require("csvtojson/v2");
const argv = require("minimist")(process.argv.slice(2));

if (!argv || !argv.f) {
  console.error("Please provide path to CSV file through the -f argument.");
  process.exit(1);
}

csv().fromFile(argv.f)
  .then(json => {
    const file = "./output.json";
    fs.writeFileSync(file, JSON.stringify(json, null, 2), err => {
      if (err) {
        console.error(err);
      }

      console.log(`File written to ${file}.`);
    });
  });