Use current computer's FQDN as default issuer

lib/commands/init.js

@@ -3,6 +3,7 @@
  */
 
 var path = require('path')
+var dns = require('native-dns')
 var mkdirp = require('mkdirp')
 var crypto = require('crypto')
 var _s = require('underscore.string')
@@ -121,6 +122,58 @@ function registerInit (cli, options, done) {
         }.bind(this))
       }
 
+      /**
+       * Get default hostname (current computer's FQDN)
+       */
+
+      function execDNSQuery (server, question, callback) {
+        var req = dns.Request({
+          server: server,
+          question: dns.Question(question)
+        })
+
+        req.on('timeout', function () {
+          callback(new Error('Request timed out.'))
+        })
+
+        req.on('message', function (err, res) {
+          if (err) { return callback(err) }
+
+          callback(null, res.answer)
+        })
+
+        req.send()
+      }
+
+      Generator.prototype.getDefaultHostname = function () {
+        var callback = this.async()
+
+        this.issuer = 'connect.example.com' // Default in case request fails
+
+        execDNSQuery({
+          address: '208.67.222.222', // OpenDNS
+          port: 53,
+          type: 'udp'
+        }, {
+          name: 'myip.opendns.com',
+          type: 'A'
+        }, function (err, ans) {
+          if (err) { return callback() }
+
+          var ip = ans[0] && ans[0].address
+
+          if (!ip) { return callback() }
+
+          dns.reverse(ip, function (err, results) {
+            if (err) { return callback() }
+            if (!results[0]) { return callback() }
+
+            this.issuer = results[0]
+            callback()
+          }.bind(this))
+        }.bind(this))
+      }
+
       /**
        * Ask for instance name
        */
@@ -152,7 +205,7 @@ function registerInit (cli, options, done) {
           type: 'input',
           name: 'issuer',
           message: 'What (sub)domain will you use?',
-          default: 'connect.example.com'
+          default: this.issuer
         }], function (answers) {
           this.issuer = answers.issuer
           callback()

package.json

@@ -26,6 +26,7 @@
     "inquirer": "^0.9.0",
     "mkdirp": "^0.5.0",
     "nash": "^2.0.0",
+    "native-dns": "^0.7.0",
     "request": "^2.61.0",
     "underscore.string": "^3.1.1",
     "update-notifier": "^0.5.0",