licenses.js

const nlf = require('nlf');
const fs = require('fs');
// const stream = fs.createWriteStream('my_file.txt');
// to only include production dependencies

const filename = process.env.PUBLIC_DIR + 'licenses.json';
fs.writeFile(filename, '', () => {
  console.log('done');
});

const depsArr = [];

nlf.find(
  {
    directory: './',
    production: true
  },
  (err, data) => {
    data.forEach(project => {
      const { name } = project;
      const { licenseSources } = project;
      if (licenseSources.license && licenseSources.package.sources['0'] && licenseSources.license.sources['0']) {
        const { text } = licenseSources.license.sources['0'];
        const { license } = licenseSources.package.sources['0'];
        const z = {
          name,
          license,
          text
        };
        depsArr.push(z);
      }
    });

    const obj = { licenses: depsArr };

    fs.writeFile(filename, JSON.stringify(obj), err => {
      console.log('err : ', err);
    });
  }
);