add black dependency, re #10690

[apeters]

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Description of Change

adds a dependency on the black module

Issues Solved

creating an app or project using the command arches-admin startapp or arches-admin startproject
throws an error

(testenv) bash-3.2$ arches-admin startproject testproj
Traceback (most recent call last):
  File "/Users/alexei/Work/Projects/arches/shpo/testapp/testenv/bin/arches-admin", line 246, in <module>
    main()
  File "/Users/alexei/Work/Projects/arches/shpo/testapp/testenv/bin/arches-admin", line 239, in main
    COMMANDS[args.command](args)
  File "/Users/alexei/Work/Projects/arches/shpo/testapp/testenv/bin/arches-admin", line 157, in command_startproject
    cmd.handle(options)
  File "/Users/alexei/Work/Projects/arches/shpo/testapp/testenv/bin/arches-admin", line 151, in handle
    super(ArchesProjectCommand, self).handle('project', project_name, target, **options)
  File "/Users/alexei/Work/Projects/arches/shpo/testapp/testenv/lib/python3.11/site-packages/django/core/management/templates.py", line 232, in handle
    run_formatters([top_dir], **formatter_paths)
  File "/Users/alexei/Work/Projects/arches/shpo/testapp/testenv/lib/python3.11/site-packages/django/core/management/utils.py", line 172, in run_formatters
    subprocess.run(
  File "/usr/local/Cellar/[email protected]/3.11.6_1/Frameworks/Python.framework/Versions/3.11/lib/python3.11/subprocess.py", line 548, in run
    with Popen(*popenargs, **kwargs) as process:
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/Cellar/[email protected]/3.11.6_1/Frameworks/Python.framework/Versions/3.11/lib/python3.11/subprocess.py", line 1026, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/usr/local/Cellar/[email protected]/3.11.6_1/Frameworks/Python.framework/Versions/3.11/lib/python3.11/subprocess.py", line 1950, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: '/Users/alexei/Library/Python/3.7/bin/black'

Checklist

• Unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Ticket Background

• Found by: @apeters
• Tested by: @apeters

[jacobtylerwalls]

@chiatt posted a workaround on the Django forum when this happened to him. I couldn't reproduce either then or now.

This is definitely a bug in Django, because this is supposed to be frictionless -- Django is only supposed to format your files if you have a working black install.

Cyrus's workaround was to just rip out the unrelated black installation. From your trace it looks like it's trying to invoke a python 3.7 interpreter. My guess is that based on some combination of your $CWD and $PATH is to blame for black being able to be detected at one time and not the other. I would just uninstall python 3.7.

I don't feel too strongly, but it seems like a shame to add a dependency just to work around a bug in Django. I'll report it upstream and see if anyone thinks it should be fixed.

[apeters]

@chiatt posted a workaround on the Django forum when this happened to him. I couldn't reproduce either then or now.

This is definitely a bug in Django, because this is supposed to be frictionless -- Django is only supposed to format your files if you have a working black install.

Cyrus's workaround was to just rip out the unrelated black installation. From your trace it looks like it's trying to invoke a python 3.7 interpreter. My guess is that based on some combination of your $CWD and $PATH is to blame for black being able to be detected at one time and not the other. I would just uninstall python 3.7.

I don't feel too strongly, but it seems like a shame to add a dependency just to work around a bug in Django. I'll report it upstream and see if anyone thinks it should be fixed.

Thanks @jacobtylerwalls! I didn't realize that this was a Django issue. Closing this PR and ticket.