@boost/config/src/helpers/getEnv.ts

Powerful convention based finder, loader, and manager of both configuration and ignore files.

/**
 * Detect the current environment name from `<project>_ENV` and `NODE_ENV`.
 */
export function getEnv(name: string): string {
	const constName = name.replace(/[A-Z]/gu, (char) => `_${char}`).toUpperCase();

	return (process.env[`${constName}_ENV`] ?? process.env.NODE_ENV ?? 'development').toLowerCase();
}