Add support to detect uv based projects

[afeblot]

uv seems to become the de-facto standard Python package and project manager.

This pull request provides support to detect uv-based projects, based on

• uv.lock
• or pyproject.toml containing a [tool.uv] section

and initializes the virtual env with the uv.sync command.

uv sync standard behavior beeing creating the virtual env in $project_dir/.venv/, the virtual env is then handled as a "virtualenv" virtual env type.

$ cd myproj
Python uv project detected. Run mkvenv to setup autoswitching
$ mkvenv
Creating virtual environment at: .venv
[...truncated...]
Switching virtualenv: .venv [Python 3.11.6]

[afeblot]

@MichaelAquilina, any chance you give me a yes/maybe/no answer?

[MichaelAquilina]

Hi @afeblot :)

I'm open to the idea of adding support for this package manager in. Thanks for your contribution.

I'll have to get a bit familiar with uv first to test out your PR

[MichaelAquilina]

could this line be turned into a function?

$(grep -c '[tool.uv]' "$venv_dir/pyproject.toml") -gt 0

Something like

function _check_pyproject_type {
  local result
  if [[ $(grep -c '[tool.uv]' "$venv_dir/pyproject.toml") -gt 0 ]]; then
     result = "uv"
  elif [[ $(grep -c '[tool.poetry]' "$venv_dir/pyproject.toml") -gt 0 ]]; then
    result = "poetry"
  ....

  printf "$result"
}

elif [[ -f "$venv_dir/pyproject.toml" ]]; then
    venv_type="$(_check_pyproject_type)"

[afeblot]

Hmmm. With uv 0.4.27 bringing support for dependency groups as described by PEP 735, and the replacement of

[tool.uv]
dev-dependencies = ["some-dependencies"]

by

[dependency-groups]
dev = ["some-dependencies"]

I don't really know now how to detect that a pyproject.toml file can and is supposed to be handled by uv.
I guess we can't just assume all pyproject.toml are handled by uv.

[azmeuk]

@MichaelAquilina gentle reminder for reviewing this ticket if you can spare the time 🙏

[hanslemm]

@afeblot I would suggest to use the lock file to determine if it is a poetry or uv managed project. If uv.lock or poetry.lock, handle accordingly.