assert-heroku-env.js

import assertEnv from '@quarterto/assert-env';
import herokuAppJson from '@quarterto/heroku-app-json';

module.exports = function(warn) {
  const herokuEnv = herokuAppJson().env;
  assertEnv(Object.keys(herokuEnv).filter(key => herokuEnv[key].required));
  
  const warnEnv = assertEnv.warn(Object.keys(herokuEnv).filter(key => !herokuEnv[key].required));
  if(warnEnv && warn) {
    warn(warnEnv);
  }
};