Nodejs script to start jenkins build and poll for status

gistfile1.txt

#!/usr/bin/env node
var request    = require('request'),
    fs = require('fs'),
    Promise = require('bluebird'),
    baseUrl = '',
    patchName = process.argv[2].toString(),
    formData = {
      file0: fs.createReadStream(`/Users/skytap/src/current/ui_nodejs/.hg/patches/${patchName}`),
      json: '{"parameter":[{"name":"ui_nodejs/.hg/patches/test_patch","file":"file0"}]}'
    };
    // wrap request with promise
    function makeRequest(url, method, data) {
      return new Promise(function (resolve, reject) {
        request({method:method, url:baseUrl+url, formData: data}, function optionalCallback(err, response) {
            if (err) {
              reject(err)
            }else {
              try {
                resolve(JSON.parse(response.body))
              } catch(err) {
                resolve();
              }
            }
        });
      });
    };
    function startBuild() {
      return makeRequest('/job/nodejs/build', 'POST', formData);
    }
    function fetchQueue() {
      return makeRequest('/queue/api/json', 'GET');
    }
    function fetchQueueItem(url) {
      return makeRequest('/'+url+'api/json', 'GET');
    }
    // poll queue status and notify when build starts
    function pollQueueItem(data){
      if (data.executable) {
        console.log('Building with patch at:');
        console.log(data.executable.url);
      } else if (data.buildable){
        fetchQueue().then((queueData) => {
          itemsInQueue = queueData.items.length
          process.stdout.write(`${data.why}. Waiting for: ${(new Date() - data.buildableStartMilliseconds)/1000} seconds. ${itemsInQueue} ahead of you. \r`);
          fetchQueueItem(data.url).then((data)=>{
            setTimeout(() => pollQueueItem(data), 30000)
          });
        });
      } else {
        process.stdout.write(data.why + "\r");
        fetchQueueItem(data.url).then((data)=>{
          setTimeout(() => pollQueueItem(data), 1000)
        })
      }
    }

    startBuild().then((data) => fetchQueue())
    .then((data) => fetchQueueItem(data.items[0].url))
    .then((data) => pollQueueItem(data))
    .catch((error) => console.log(error));