ensure-config

bun install ensure-config

Fail early and enforces presence of env variables. It is much better for the application to fail at startup than to run into undefined behavior because a value is missing.

Usage

Replace process.env calls with the envOrThrow equivalent and define the variables right after the import section. The variables are unconditionally evaluated at startup and ensure that the application crashes before a lazily evaluated code path with an env variable is it.

PORT=4000
REDIS_URL= 'redis://127,0,0,1;6379'
CORS_DOMAINS= 'localhost:3000,localhost:14000'
LOGGING_ENABLED= true
FAIL_EARLY = 0

import {
  envOrThrow,
  envOrThrowArray,
  envOrThrowBoolean,
  envOrThrowInt,
} from 'ensure-config';

const PORT = envOrThrowInt('PORT');
const REDIS_URL = envOrThrow('REDIS_URL');
const CORS_DOMAINS = envOrThrowArray('CORS_DOMAINS');
const LOGGING_ENABLED = envOrThrowBoolean('LOGGING_ENABLED');
const FAIL_EARLY = envOrThrowBoolean('FAIL_EARLY');

///Rest of the code