Allow env variable only

[vk496]

import typer
from typing import Annotated


def main(name: Annotated[str, typer.Option(..., envvar="NAME")]):
    print(f"Hello {name}")


if __name__ == "__main__":
    typer.run(main)

Hello,

I have a app that use threads/processes under the hood, so any initialized variables passed from args is not propagated/saved in the newly created process. However, ENV vars are accessible from there.

I know that ENV vars are a alternative way. But can they be the ONLY way to define arguments?
Operating System

Linux
Operating System Details

No response
Typer Version

0.15.1
Python Version

3.12.8
Additional Context

No response