Config option to disable update check notification

[LeSuisse]

• I'd be willing to implement this feature (contributing guide)

Describe the user story

I'm in a team where all our development tools are pinned via Nix so we have the same reproducible environment.
We update the environment on a regular basis but with the fast development of pnpm we are often a bit behind so we get the notification message. It is not really a big issue as we can just ignore it until the next time we upgrade our dev tools but it is still a small annoyance and can it can be confusing for newcomers because the suggested upgrade command will not work.

Describe the solution you'd like

Having an additional configuration flags check-for-updates defaulting to true would be great.

Describe the drawbacks of your solution

Users could set this option to just ignore the new versions and never update pnpm which is not a good thing. It is however probable that users doing that on purpose never update even today anyway.

Describe alternatives you've considered

When update-notifier was used it was possible to disable the notification with the env variable NO_UPDATE_NOTIFIER. It looks like this is no more possible since 90487a3 and unless I miss something there is no alternative.

[gluxon]

+1 to this feature. I would also be happy to help implement this.

Did some quick searching and npm currently uses the update-notifier config key.

https://github.com/npm/cli/blob/4dbeb007d0d6350284c7b1edbf4d5b0030c67c66/lib/utils/update-notifier.js#L39-L43

  if (!npm.config.get('update-notifier') ||
      isGlobalNpmUpdate(npm) ||
      ciDetect()) {
    return null
  }

Which was implemented here: npm/npm#20750