Nodejs postbuild script for Heroku

heroku-postbuild.js

'use strict';

require('dotenv').config();

const {
  HEROKU_APP_NAME,
  AUTH_TOKEN
} = process.env;

const 
  request = require('request-promise'),
  logger = require('heroku-logger');

const resouceUrl = `https://api.heroku.com/apps/${HEROKU_APP_NAME}/config-vars`;

const options = {
  method: 'PATCH',
  uri: resouceUrl,
  body: {
    LAST_POSTBUILD_EXECUTION: (new Date()).toISOString()
  },
  headers: {
    'Content-Type': 'application/json',
    'Accept': 'application/vnd.heroku+json; version=3',
    'Authorization': `Bearer ${AUTH_TOKEN}`
  },
  json: true
};

request(options)
  .then((response) => {
    delete response.AUTH_TOKEN;
    logger.info(JSON.stringify(response, null, 2));
  })
  .catch((err) => {
    logger.error(err + '');
  });

/*
1) update your package.json file:
"scripts": {
    "heroku-postbuild": "node path-to-postbuild.js",
  }

2) enable dyno metadata for your Heroku app
heroku labs:enable runtime-dyno-metadata -a <app_name>

3) create new long-lived user authorization token and save it to an app config var, e.g. AUTH_TOKEN
*/