scripts/updateLocalEnv.ts

import fs from "fs";

const SECRET_CONFIG = fs.existsSync(".env.SECRET_CONFIG")
	? fs.readFileSync(".env.SECRET_CONFIG", "utf8")
	: process.env.SECRET_CONFIG;

if (SECRET_CONFIG === "") {
	throw new Error(
		"SECRET_CONFIG is not defined. Please provide it either in a file or as an environment variable."
	);
}

// Read the content of the file .env.template
const PUBLIC_CONFIG = fs.readFileSync(".env.template", "utf8");

// Prepend the content of the env variable SECRET_CONFIG
const full_config = `${PUBLIC_CONFIG}\n${SECRET_CONFIG}`;

// Write full_config to .env.local
fs.writeFileSync(".env.local", full_config);