TypeError when defining custom Pino logger

[Marco Reni]

Description

I'm trying to define a custom Pino logger in order to customize logs. I'm therefore injecting a pino (v4.17) instance.

I tried using a simple logger: require('pino')() but I'm receiving an error:

/usr/src/shared/node_modules/nats-hemera/node_modules/joi/lib/types/object/index.js:171
                         target[key] = result.value;
                                     ^

TypeError: Cannot assign to read only property 'child' of object '#<EventEmitter>'
     at internals.Object._base (/usr/src/shared/node_modules/nats-hemera/node_modules/joi/lib/types/object/index.js:171:37)
     at internals.Object._validate (/usr/src/shared/node_modules/nats-hemera/node_modules/joi/lib/types/any/index.js:602:37)
     at internals.Alternatives._base (/usr/src/shared/node_modules/nats-hemera/node_modules/joi/lib/types/alternatives/index.js:54:35)
     at internals.Alternatives._validate (/usr/src/shared/node_modules/nats-hemera/node_modules/joi/lib/types/any/index.js:602:37)
     at internals.Object._base (/usr/src/shared/node_modules/nats-hemera/node_modules/joi/lib/types/object/index.js:157:45)
     at internals.Object._validate (/usr/src/shared/node_modules/nats-hemera/node_modules/joi/lib/types/any/index.js:602:37)
     at internals.Object._validateWithOptions (/usr/src/shared/node_modules/nats-hemera/node_modules/joi/lib/types/any/index.js:662:29)
     at module.exports.internals.Any.root.validate (/usr/src/shared/node_modules/nats-hemera/node_modules/joi/lib/index.js:136:23)
     at new Hemera (/usr/src/shared/node_modules/nats-hemera/lib/index.js:69:24)
     at new Hemera (/usr/src/shared/src/libs/service/hemera.js:11:1)

(I may be able to workaround by declaring a logger object that calls pino, like:

const logger = {
   info: (payload, msg) => customPinoInstance.info(payload, msg),
   ...
}

But I wouldn't know how to handle child loggers.)

Steps to Reproduce

const hemera = new Hemera(nats, {
     logger: require('pino')()
})

Your Environment

• Hemera: 5.8.9
• NodeJs: 8.11.3
• Environment name and version: Alpine Linux on Docker

[Dustin Deus]

Hi @marcoreni thanks for reporting. I could reproduce it and it's fixed with Hemera 6.