next-logger/lib/patches/next.js

JSON logging patcher for Next.js

const nextLogger = require('next/dist/build/output/log')

const logger = require('../logger')

const getLogMethod = nextMethod => {
  const childLogger = logger.child({ name: 'next.js', prefix: nextMethod })

  switch (nextMethod) {
    case 'error':
      return childLogger.error.bind(childLogger)
    case 'warn':
      return childLogger.warn.bind(childLogger)
    case 'trace':
      if ('trace' in childLogger) {
        return childLogger.trace.bind(childLogger)
      }
      // To support Winston which doesn't have logger.trace()
      return childLogger.debug.bind(childLogger)
    default:
      return childLogger.info.bind(childLogger)
  }
}

const cachePath = require.resolve('next/dist/build/output/log')
const cacheObject = require.cache[cachePath]

// This is required to forcibly redefine all properties on the logger.
// From Next 13 and onwards they're defined as non-configurable, preventing them from being patched.
cacheObject.exports = { ...cacheObject.exports }

Object.keys(nextLogger.prefixes).forEach(method => {
  Object.defineProperty(cacheObject.exports, method, { value: getLogMethod(method) })
})