Hassfest is broken for fresh dev setup: ModuleNotFoundError: No module named 'black'

[ginkel]

The problem

After setting up a manual dev environment according to https://developers.home-assistant.io/docs/development_environment/ running python3 -m script.scaffold integration throws an exception:

(venv)  ~/workspace/home-assistant-core $ python3 -m script.scaffold integration

What is the domain?
> automation

Running hassfest to pick up new information.
Traceback (most recent call last):
  File "/usr/lib/python3.10/runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/lib/python3.10/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/home/tg/workspace/home-assistant-core/script/hassfest/__main__.py", line 7, in <module>
    from . import (
  File "/home/tg/workspace/home-assistant-core/script/hassfest/application_credentials.py", line 4, in <module>
    import black
ModuleNotFoundError: No module named 'black'

Running gen_requirements_all to pick up new information.

Running script/translations_develop to pick up new translation strings.


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Integration code has been generated

The next step is to look at the files and deal with all areas marked as TODO.

I am aware of https://github.com/home-assistant/core/issues/79248, but this looks as if script/setup does not install the black module. Manually installing it using pip install black immediately resolves the issue.

What version of Home Assistant Core has the issue?

git-5884f50a82

What was the last working version of Home Assistant Core?

core-2022.9.7, according to #79248

What type of installation are you running?

Home Assistant Core

Integration causing the issue

No response

Link to integration documentation on our website

https://developers.home-assistant.io/docs/development_environment/

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

No response