*Is there anything already existing matching thetitle?*
*DETAILS*
At its core, it should be a single stand-alone `python` script you store "embedded" in the client repo (so that it is immediately available on clone).
Users are supposed to run it on `git clone` (or `git pull`) *before* anything else can work (e.g. no `venv`, no packages yet).
It has to bootstrap the env into the required state, taking some preferences from repo config (like client project directory layout, python version, dependencies, log verbosity, target env overrides, etc.). It may provide possibility for extensions (e.g. pre-commit setup, generating code & config, etc.), but that is already with `venv` (does not need to be that bootstrapper).
Eventually, once the `venv` is ready and full of other tools, it may delegate the execution to them. Those other tools may cover wider functionality, be more flexible, and are subject to client-specific choices - let’s forget about them.
But that initial bootstrapper should stay focused on the early bootstrap process only (stay small) - do the basics (which are often re-invented from repo to repo via shell-scripting) in a customizable way.
So, I want to find, review, contribute to anything like that, or confirm the niche is still to be filled.