Typer --install-completion in Dockerfile RUN instruction fails

[theodore86]

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Example Code

import typer

app = typer.Typer()


@app.command()
def hello(name: str):
    print(f"Hello {name}")

if __name__ == "__main__":
    app()

Description

I have created a Dockerfile:

FROM python:3.11

COPY requirements.txt /
COPY main.py   /

RUN pip install -r requirements.txt

RUN python3 -m main --install-completion bash

With typer==0.10.0 the auto-completion command works as expected but with typer==0.12.3 command fails:

 > [5/5] RUN python3 -m main --install-completion bash:                                                                                                                                                     
#0 0.574 Shell sh is not supported.                                                                                                                                                                         
------                                                                                                                                                                                                      
Dockerfile:8                                                                                                                                                                                                
--------------------
   6 |     RUN pip install -r requirements.txt
   7 |     
   8 | >>> RUN python3 -m main --install-completion bash
   9 |     

It seems like something has changed regarding auto completionin the version 0.12.3 or am i doing something wrong?

I cannot downgrade and pinned to 0.10.0 because the fastapi depends on fastapi-cli which requires typer>=0.12, i could use the fastapi-slim but in any case seems like an issue with latest typer package.

Most probably is an issue with the:

shellingham==1.5.4
-    # via typer

In this case the line 217 may raise exception ShellDetectionFailure(): https://github.com/tiangolo/typer/blob/master/typer/_completion_shared.py#L217

Operating System

Linux

Operating System Details

CRI - Docker

Typer Version

0.12.3

Python Version

3.11

Additional Context

No response

[theodore86]

Well i will close this discussion the most suitable solution is to go via typer-slim.