replace custom logic with node-version-data package

package.json

@@ -41,6 +41,7 @@
     "metalsmith-serve": "0.0.3",
     "metalsmith-stylus": "1.0.0",
     "ncp": "2.0.0",
+    "node-version-data": "1.0.0",
     "octonode": "0.7.4",
     "require-dir": "0.3.0",
     "semver": "5.0.3",

scripts/load-versions.js

@@ -3,68 +3,21 @@
 'use strict'
 
 const fs = require('fs')
-const semver = require('semver')
-const map = require('map-async')
-const https = require('https')
+const nodeVersionData = require('node-version-data')
 
-function loadVersions (callback) {
-  map(
-    [ 'https://nodejs.org/dist/index.json', 'https://iojs.org/dist/index.json' ],
-    download,
-    function (err, versions) {
-      if (err) { return callback(err) }
-      versions = munge(versions)
-      callback(null, versions)
-    }
-  )
-}
-
-function download (url, cb) {
-  let data = ''
-  https.get(url, function (res) {
-    res.on('data', function (chunk) { data += chunk })
-    res.on('end', function () {
-      try {
-        cb(null, JSON.parse(data))
-      } catch (e) {
-        return cb(e)
-      }
-    })
-  }).on('error', function (e) {
-    console.error('Error downloading file from %s: %s', url, e.message)
-    cb(e)
-  })
-}
-
-function munge (versions) {
-  versions[0].forEach(function (v) {
-    v.url = 'https://nodejs.org/dist/' + v.version + '/'
-    v.name = 'Node.js'
-  })
-  versions[1].forEach(function (v) {
-    v.url = 'https://iojs.org/dist/' + v.version + '/'
-    v.name = 'io.js'
-  })
-
-  let allVersions = versions[0].concat(versions[1])
-
-  allVersions.sort(function (a, b) {
-    return semver.compare(b.version, a.version)
-  })
-
-  return allVersions
-}
-
-module.exports = loadVersions
+module.exports = nodeVersionData
 
 if (require.main === module) {
-  loadVersions(function (err, versions) {
+  nodeVersionData((err, versions) => {
     if (err) {
       console.error('Aborting due to download error from node or iojs')
       console.error(err.stack)
       return process.exit(1)
     }
 
-    fs.writeFileSync(__dirname + '/../source/versions.json', JSON.stringify(versions, null, 2))
+    fs.writeFileSync(
+      __dirname + '/../source/versions.json'
+      , JSON.stringify(versions, null, 2)
+    )
   })
 }