Return value from Typer function is printed only when installed

I apologize in advance for how obscure this bug is.

I’ll start by taking the simple Typer demo and modifying it to have download return a string:

import rich_click.typer as typer

app = typer.Typer()

@app.command()
def sync(
    type: str = typer.Option("files", help="Type of file to sync"),
    all: bool = typer.Option(False, help="Sync all the things?"),
):
    print("Syncing")


@app.command()
def download(all: bool = typer.Option(False, help="Get everything")):
    return "Shouldn't appear" # <-- RETURNS A STRING NOW


if __name__ == "__main__":
    app()

When run directly, everything is normal:

$ python vdsearch/test.py download
$

Now let’s pip install -e . with testy mapped to test:app

$ testy download
Shouldn't appear
$

I’ve gotten around this bug by defining wrapper functions for my functions but it would be nice to get to the bottom of what’s going on.

[ewels]

Awesome. Thanks @mcflugen!

[mcflugen]

@ewels, sorry, I forgot to mention that I’ve only seen this behavior when I use rich-click, unfortunately. So if in my example I replace import rich_click as click with import click, the extra output disappears.