Replace flit with a packaging solution that supports editable installs

[ssbarnea]

First Check

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Example Code

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Description

Currently typer cannot be installed in editable mode because flit does not support dit

pip install -e .
ERROR: Project file:///Users/ssbarnea/c/os/typer has a 'pyproject.toml' and its build backend is missing the 'build_editable' hook. Since it does not have a 'setup.py' nor a 'setup.cfg', it cannot be installed in editable mode. Consider using a build backend that supports PEP 660.

I am suggesting setuptools-scm as that is easy to fix and its maintenance status is considerably better than the other ones I know.

If @tiangolo has nothing against, I would be more than happy to make a PR to do it as the switch should be quite easy.

Operating System

Linux

Operating System Details

No response

Typer Version

main branch

Python Version

n/a

Additional Context

No response

[ssbarnea]

To rephrase this issue, basically current typer packaging is discouraging contributions because it does not allow people to perform editable installs, which are the most effective way to test(experiment) changes made to a python library.

[connorferster]

I use flit install --pth-file for editable installs on projects I am working on with flit.

[svlandeg]

I'm also using flit and it's creating an editable install just fine on my system. @ssbarnea: did you follow the installation instructions? Instead of the usual pip install -e ., running the flit command that is given there should work (note that the command looks slightly different on Windows vs Linux)

[tiangolo]

With the recent refactor from Flit to PDM, it is now installable with pip. You can do pip install -e ., or pip install -r requirements.txt to include the editable install and the development dependencies. 🤓 🚀