type safe env variable parsing with valibot

env-variables.ts

import { config } from 'dotenv';
import type { InferInput, ValiError } from 'valibot';
import { object, parse, string } from 'valibot';
config();

const envVariables = object({
  MY_KEY: string(),
});

parse(envVariables, process.env);

try {
  parse(envVariables, process.env);
} catch (e) {
  console.error((e as ValiError<typeof envVariables>).message);
  process.exit(1);
}

declare global {
  // eslint-disable-next-line @typescript-eslint/no-namespace
  namespace NodeJS {
    interface ProcessEnv extends InferInput<typeof envVariables> {}
  }
}

export {};