Passing custom command line argument to faust app

[misty256]

Checklist

• [x] I have included information about relevant versions
• [x] I have verified that the issue persists when using the master branch of Faust.

Steps to reproduce

I need to pass a custom command line argumen to faust app. Example: python src/app.py worker my-argument This however lead to an Error: no such option: my-argument Looks like it is possible to pass only arguments known to faust, and there is no option to pass custom ones.

Expected behavior

Have a possibility for passing custom arguments to the app.

Actual behavior

Error: no such option: my-argument

Versions

• Python version 3.9
• Faust version 0.8.4
• Operating system Mac OS
• Kafka version 2.7.x

[wbarnha]

It depends on your use-case, but I've personally had success using argparse and passing the arguments to sys.argv. You can take a look at https://stackoverflow.com/questions/72182252/how-to-specify-faust-arguments-when-using-app-main/72231794#72231794 to know more.

To build this into faust, changes would have to be made in faust.cli.worker.worker which isn't exactly intended to be modified.