given a list of dependencies, grab their version, license information, and dependencies, then grab version and license information for the dependencies. Outputs an html list.

index.js

const fs = require('fs');
const getLatestVersion = require('latest-semver');
const semver = require('semver');
require('isomorphic-fetch');

const NPM = 'https://registry.npmjs.com';

function getPackage(name) {
  return fetch(`${NPM}/${name}`)
    .then(function (response) {
      return response.json();
    });
}

function getDependency(name, version) {
  return getPackage(name)
    .then(function (package) {
      let latestVersion = semver.maxSatisfying(Object.keys(package.versions), version);
      let requestedVersion = package.versions[latestVersion];

      return {
        name: requestedVersion.name,
        url: `https://npmjs.com/package/${requestedVersion.name}`,
        description: requestedVersion.description,
        version: latestVersion,
        license: requestedVersion.license
      }
    })
}

function renderPackage(data) {
  let template = `<li><a href="${data.url}">${data.name} (${data.version})</a>, ${data.license}: ${data.description}
  <ul>${(data.dependencies || []).map(function (dep) {
    return `<li><a href="${dep.url}">${dep.name} (${dep.version})</a>, ${dep.license}: ${dep.description}</li>`;
  }).join('')}</ul>
  </li>
  `;

  return template;
}

const PACKAGES = [
  'documentation',
  'gulp-documentation'
];
var promise;

if (Array.isArray(PACKAGES)) {
  promise = Promise.all(PACKAGES.map(function (p) {
    return getPackage(p);
  }))
} else {
  promise = [getPackage(PACKAGES)];
}


promise
  .then(function (packages) {
    return Promise.all(packages.map(function(package) {
      let latestVersion = getLatestVersion(Object.keys(package.versions));
      let requestedVersion = package.versions[latestVersion];
      let dependencies = requestedVersion.dependencies;
      let depList = [];

      Object.keys(dependencies).forEach(function (name) {
        depList.push(getDependency(name, dependencies[name]));
      }, []);

      return Promise.all(depList).then(function (deps) {
        let originalPackage = {
          name: requestedVersion.name,
          url: `https://npmjs.com/package/${requestedVersion.name}`,
          description: requestedVersion.description,
          version: latestVersion,
          license: requestedVersion.license,
          dependencies: deps
        }
        return originalPackage;
      })
    }))
  })
  .then(function (data) {
    return `<ul>${data.map(function (d) {
      return `${renderPackage(d)}`
    }).join('')}</ul>`;
  })
  .then(function (html) {
    fs.writeFileSync('./ossr.html', html);
  })
  .catch(function (ex) {
    console.log(ex);
  })

package.json

{
  "name": "ossr",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "isomorphic-fetch": "^2.2.1",
    "latest-semver": "^1.0.0",
    "semver": "^5.4.1",
    "semver-extra": "^2.0.1"
  }
}