.env calling variables in different files

Question

I have a .env file that stores two different variables:

x=123
y=456

In the same folder, I have three other files, with a tree below:

/folder
   /.env
   /config.js
   /app_setup.js
   /match_algo.js

In my config.js file, I am reading the variables inside .env file and exporting them:

const dotenv = require('dotenv');
const cfg = {};
dotenv.config({path: '.env'});

cfg.port = process.env.PORT;
cfg.x = process.env.x;
cfg.y = process.env.y;

module.exports = cfg;

In the app.setup.js file, I am using the variable x from .env:

var firebase = require("firebase");
const Config = require('./config');

var config = {
  apiKey: Config.x
};
firebase.initializeApp(config);

module.exports = firebase;

In match_algo, I am using the variable y from .env to do something else:

const Router = require('express').Router;
const Config2 = require('./config');
const router = new Router();

exports.return_match_uid = function return_match_uid() {
  var variable2 = Config2.y;
.....

Apparently, the variable y in match_algo is not read properly. I did not see any problem with my codes.

Answer 1

When you want to give a path to dotenv config, you need to give the proper path. Not just the .env. See this

const dotenv = require('dotenv');
const cfg = {};
dotenv.config({path: './folder/.env'});

cfg.port = process.env.PORT;
cfg.x = process.env.x;
cfg.y = process.env.y;

module.exports = cfg;

Hope this helps