Simple Google Cloud Function to trigger a Circle job when called

trigger-circle.js

/**
 * Responds to any HTTP request.
 *
 * @param {!express:Request} req HTTP request context.
 * @param {!express:Response} res HTTP response context.
 */

const https = require('https');

exports.triggerCircle = (req, res) => {
  
  const VCS = 'github';
  const ORG = 'atticuslabs';
  const REPO = 'consumer-web';
  const BRANCH = 'develop';
  const CIRCLE_TOKEN = 'CIRCLE_TOKEN_OMITTED';
  let CIRCLE_JOB = 'cypress-staging';
  
  // Heroku constants
  const HEROKU_PROD_APP_NAME = 'consumer-web-prod';
  
  const { data } = req.body;
  
  if (!data || data.status !== 'succeeded') {
    res.status(400).send("no successful build detected");
    return;
  }
  
  if (
    data.app 
    && (data.app.name === HEROKU_PROD_APP_NAME)
  ) {
    CIRCLE_JOB = 'cypress-prod';
  }
  
  const options = {
    hostname: 'circleci.com',
    path: `/api/v1.1/project/${VCS}/${ORG}/${REPO}/tree/${BRANCH}?circle-token=${CIRCLE_TOKEN}`,
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
  }
  
  const postBody = JSON.stringify({
    build_parameters: {
          CIRCLE_JOB: CIRCLE_JOB
      }
  });
  
  const request = https.request(options, (response) => {
    res.status(200).json(`status code: ${response.statusCode}`);
  });
  
  request.on('error', (e) => {
    res.status(400).json(e);
  });
  request.write(postBody);
  
  request.end();

};