Use setuptools entrypoints to find apps

In contrast to scanning the aleksis.apps namespace, this has some benefits:

1. Does not need to import the module to consider it (resolve potential circular imports 🤩)
2. Does not need to scan filesystems and wheels
3. Apps can choose their own namespaces, register multiple apps/ variants, and much more)

mentioned in merge request AlekSIS-App-Alsijil!106 (merged)

mentioned in merge request AlekSIS-App-CSVImport!20 (merged)

mentioned in merge request AlekSIS-App-Chronos!102 (merged)

mentioned in merge request AlekSIS-App-DashboardFeeds!29 (merged)

mentioned in merge request AlekSIS-App-Hjelp!51 (merged)

mentioned in merge request AlekSIS-App-LDAP!32 (merged)

mentioned in merge request AlekSIS-App-Untis!39 (merged)

marked as a Work In Progress

added 1 commit

• 900bbc27 - Use setuptools entrypoints to find apps

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changed title from Draft: Use setuptools entrypoints to find apps' to Draft: Use setuptools entrypoints to find apps

unmarked as a Work In Progress

assigned to @hansegucker

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• 293c2950 - Allow for app packages with different package structure

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(venv) root@ticdesk:/usr/src/AlekSIS# DJANGO_SETTINGS_MODULE=aleksis.core.settings django-admin yarn install
Traceback (most recent call last):
  File "/srv/www/aleksis/venv/lib/python3.7/site-packages/django/core/management/__init__.py", line 224, in fetch_command
    app_name = commands[subcommand]
KeyError: 'yarn'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/srv/www/aleksis/venv/bin/django-admin", line 8, in <module>
    sys.exit(execute_from_command_line())
  File "/srv/www/aleksis/venv/lib/python3.7/site-packages/django/core/management/__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "/srv/www/aleksis/venv/lib/python3.7/site-packages/django/core/management/__init__.py", line 395, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/srv/www/aleksis/venv/lib/python3.7/site-packages/django/core/management/__init__.py", line 231, in fetch_command
    settings.INSTALLED_APPS
  File "/srv/www/aleksis/venv/lib/python3.7/site-packages/django/conf/__init__.py", line 83, in __getattr__
    self._setup(name)
  File "/srv/www/aleksis/venv/lib/python3.7/site-packages/django/conf/__init__.py", line 70, in _setup
    self._wrapped = Settings(settings_module)
  File "/srv/www/aleksis/venv/lib/python3.7/site-packages/django/conf/__init__.py", line 177, in __init__
    mod = importlib.import_module(self.SETTINGS_MODULE)
  File "/srv/www/aleksis/venv/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/srv/www/aleksis/venv/lib/python3.7/site-packages/aleksis/core/settings.py", line 9, in <module>
    from .util.core_helpers import (
  File "/srv/www/aleksis/venv/lib/python3.7/site-packages/aleksis/core/util/core_helpers.py", line 4, in <module>
    from importlib import import_module, metadata
ImportError: cannot import name 'metadata' from 'importlib' (/srv/www/aleksis/venv/lib/python3.7/importlib/__init__.py)

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• d229fb5a - Use backported importlib_metadata on Python 3.7

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• ded9c1d2 - Use backported importlib_metadata on Python 3.7

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marked as a Work In Progress

unmarked as a Work In Progress

added 3 commits

• ded9c1d2...ce62cc6a - 2 commits from branch master
• 215693e3 - Merge branch 'master' into feature/use-entrypoints

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resolved all threads

merged

mentioned in commit 59be5513