Run Python formatters/linters/... in an environment #14794

Current situation

I have a specific setup for defining my development environment (I use Nix).

What I can do for now is create an environment, which is supposed to have Python, black, flake8, ...
This environment can be built and oaded to the shell using the nix-shell command in the terminal for instance.
I can run python -m black in this shell without issue.

Once the Python environment is built with Nix, it is defined statically, which means that I do have an executable /nix/store/somehash/bin/python that corresponds to my environment (it is actually a wrapper in bash that sets the right environment variables before starting Python).
When I use this Python wrapper, the VS Code Python extension should pickup the same environment and have no issue running for instance the formatter through python -m black for instance.

Feature I would like

I would like the Python extension to either:

• properly run such a wrapped Python executable bash in order to pickup the environment variables
  or
• allow the Python extension to run its commands in a shell, for instance the one specified by terminal.integrated.automationShell

Investigation

I did my own investigation, and found out that

the formatter is run using this:

So I guess you spawn the process. Don't know why it doesn't pickup the environment variables the bash Python wrapper defines.