import util from 'util'; const enableDebugging = process.env.DEBUG != null; function noop() {} function createLog(req) { return { debug: enableDebugging ? (format, ...args) => { console.log(util.format(format, ...args)); } : noop, info: (format, ...args) => { console.log(util.format(format, ...args)); }, error: (format, ...args) => { console.error(util.format(format, ...args)); } }; } export default function requestLog(req, res, next) { req.log = createLog(req); next(); }