[GitHub] [pulsar] Anonymitaet opened a new issue, #19526: [improve][CLI] show environment variables in CLI and optimize them to `--config-file` argument

[via GitHub]

Anonymitaet opened a new issue, #19526:
URL: https://github.com/apache/pulsar/issues/19526

   ### Search before asking
   
   - [X] I searched in the [issues](https://github.com/apache/pulsar/issues) 
and found nothing similar.
   
   
   ### Motivation
   
   I've separated the code improvements from 
https://github.com/apache/pulsar/issues/19492 (created by @visortelle) and 
discussed them with @codelipenghui as below.
   
   ### 1. Show `enviroment variables` for `pulsar-admin` and `pulsar-client` on 
CLI
   
   Contexts:
   
   I've double-checked the current behavior:
   
   - `pulsar-perf -help` shows `environment variables`
   <img width="1000" alt="image" 
src="https://user-images.githubusercontent.com/50226895/218926299-9b56c9cb-b972-4208-8e90-29cdf3c1ec9e.png";>
   
   - while `pulsar-admin -help` and `pulsar-client` do not show `environment 
variables`
   
   <img width="306" alt="image" 
src="https://user-images.githubusercontent.com/50226895/218927276-b72f5bae-58ef-4b59-a182-da9028e5fd80.png";>
   
   <img width="338" alt="image" 
src="https://user-images.githubusercontent.com/50226895/218926938-bd543168-f46f-4c41-95a2-c183c6aeff0c.png";>
   
   To give users complete info,`environment variables` should be shown on 
`pulsar-admin` and `pulsar-client` CLI as well.
   
   ### 2. Implement `--config-file CLI` argument instead of `environment 
variables`.
   
   @visortelle has explained it in https://github.com/apache/pulsar/issues/19492
   
   
   
   ### Solution
   
   _No response_
   
   ### Alternatives
   
   _No response_
   
   ### Anything else?
   
   _No response_
   
   ### Are you willing to submit a PR?
   
   - [ ] I'm willing to submit a PR!


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