Can't use pino with transport in production (transport are tree shaken away from build)

[leo91000]

Hey guys,

I want to use pino in my nitro app, however when building the app, only the used modules are packaged to the .output dir.

However, pino transport are declared by a string :

createTransport({ target: 'pino-pretty' }) // target is the name of the transport package

So you can see why this won't work with nitro : when running pnpm run build, the package pino-pretty is absent, and the server can't start (it crashes).

Do you see a config/workaround to make nuxt include this package to the .output/server/node_modules/ folder ?

Thanks by advance

[pi0]

Hi. Can you please share a runnable repo or reproduction? 🙏🏼

[leo91000]

Hi !
I tried to make a reproduction, but it seems to work on the minimal reproduction setup https://stackblitz.com/edit/github-a4yom5?file=routes%2Findex.ts,package.json

Could it be because I'm on a monorepo setup, and the logging thing is on it's own package?

Otherwise I found a workaround, with pino stream, you can directly import the transport (however, not ideal performance since it does not allow for logs to be handled in a worker thread)

import pino from 'pino'
import pinoPretty from 'pinoPretty'

const streams = [
  { stream: pino.destination(1) },
  pinoPretty({ ... })
]

const logger = pino(
  {
    level: 'trace',
  },
  pino.multistream(streams)
)