winston:create-logger diagnostic cannot be turned off

[esetnik]

Please tell us about your environment:

• winston version?
  • winston@2
  • winston@3
• node -v outputs: v10.16.3
• Operating System? (Windows, macOS, or Linux) macOS
• Language? (all | TypeScript X.X | ES6/7 | ES5 | Dart) Typescript

What is the problem?

import winston from 'winston';

const logger = winston.createLogger({
  level: 'debug',
  format: winston.format.json(),
  transports: [new winston.transports.Console()],
});

export default logger;

In the console I see a lot of messages coming from the diagnostic logger.

winston:create-logger Define prototype method for "error"
winston:create-logger Define prototype method for "warn"
winston:create-logger Define prototype method for "info"
winston:create-logger Define prototype method for "http"
winston:create-logger Define prototype method for "verbose"
winston:create-logger Define prototype method for "debug"
winston:create-logger Define prototype method for "silly"
winston:create-logger Define prototype method for "error"
winston:create-logger Define prototype method for "warn"
winston:create-logger Define prototype method for "info"
winston:create-logger Define prototype method for "http"
winston:create-logger Define prototype method for "verbose"
winston:create-logger Define prototype method for "debug"
winston:create-logger Define prototype method for "silly"
winston:create-logger Define prototype method for "error"
winston:create-logger Define prototype method for "warn"
winston:create-logger Define prototype method for "info"
winston:create-logger Define prototype method for "http"
winston:create-logger Define prototype method for "verbose"
winston:create-logger Define prototype method for "debug"
winston:create-logger Define prototype method for "silly"
winston:create-logger Define prototype method for "error"
winston:create-logger Define prototype method for "warn"
winston:create-logger Define prototype method for "info"
winston:create-logger Define prototype method for "http"
winston:create-logger Define prototype method for "verbose"
winston:create-logger Define prototype method for "debug"
winston:create-logger Define prototype method for "silly"

What do you expect to happen instead?

I expected none of these internal winston debug messages in my console. I tried using DEBUG=-winston:create-logger and DIAGNOSTIC=-winston:create-logger but neither worked.

Other information

I saw another user report the same issue https://gitter.im/winstonjs/winston/archives/2017/11/22
And another user report the same issue https://stackoverflow.com/questions/55573448/disable-winstons-verbose-startup-logs

[esetnik]

I believe this is caused by 3rd-Eden/diagnostics#20

[Nhilesh]

This is caused by line no 54 in 'create-logger.js' where the developer has kept a debug line open for us.

debug('Define prototype method for "%s"', level);

I did comment this line manually and the problem is solved.

[RandyZ]

Same question

[jcollum]

We are also having an issue with that line. Commenting it out is not an option, realistically.

[rsgilbert]

I can confirm that setting: DEBUG=-winston:create-logger in your .env file works.

[robblovell]

None of the following .env lines removes this debug output in winston@3.8.2 nor winston@3.11.0. Setting env on the command line does not work either.

DIAGNOSTICS=-winston:*
DEBUG=-winston:*
DIAGNOSTICS=-winston:create-logger:*
DEBUG=-winston:create-logger:*
DIAGNOSTICS=-winston:create-logger
DEBUG=-winston:create-logger
DIAGNOSTICS=-*
DEBUG=-*

Perhaps the act of initializing Winston in our code, or the Winston code itself, somehow negates the environment variables?

[DABH]

Are you using the @dabh/diagnostics package in any other part of your repo? Are you using winston from somewhere where process.env isn't available? https://github.com/DABH/diagnostics?tab=readme-ov-file#adapters Haven't seen others report this issue so thinking it must be something special about your env or setup...