Fix the CLI --pythonpath parameter

[rtibbles]

Summary

• Make setting django settings and pythonpath idempotent and reusable.
• Ensure we validate pythonpath option before settings option.
• Set python path for all CLI commands so that it can be used for plugins too.
• Cleans up deprecated methods

References

Fixes #10296

Reviewer guidance

Create a dummy plugin or settings file in a completely different folder. Pass the (can be relative) path to that folder using the the --pythonpath CLI option when invoking kolibri shell kolibri plugin enable or the like, and ensure that the settings file or plugin can take effect.

[github-actions]

Build Artifacts

Asset type	Download link
PEX file	kolibri-0.18.0a0.dev0_git.273.gc183c87a.pex
Windows Installer (EXE)	kolibri-0.18.0a0.dev0+git.273.gc183c87a-windows-setup-unsigned.exe
Debian Package	kolibri_0.18.0a0.dev0+git.273.gc183c87a-0ubuntu1_all.deb
Mac Installer (DMG)	kolibri-0.18.0a0.dev0+git.273.gc183c87a.dmg
Android Package (APK)	kolibri-0.18.0a0.dev0+git.273.gc183c87a-0.1.4-debug.apk
Raspberry Pi Image	kolibri-pi-image-0.18.0a0.dev0+git.273.gc183c87a.zip
TAR file	kolibri-0.18.0a0.dev0+git.273.gc183c87a.tar.gz
WHL file	kolibri-0.18.0a0.dev0+git.273.gc183c87a-py2.py3-none-any.whl

[nucleogenesis]

I tried this in #12879 and

kolibri shell --pythonpath integration_testing/development_plugin seems to work.

Not sure if this is a proper error or expected for trying to import this in the shell though?

In [4]: from integration_testing.development_plugin.kolibri_plugin import *
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
Cell In[4], line 1
----> 1 from integration_testing.development_plugin.kolibri_plugin import *

File ~/LE/krakens/kolibri.worktrees/snake_like_path/integration_testing/development_plugin/kolibri_plugin.py:7
      4 from magicbus.plugins import SimplePlugin
      5 from magicbus.plugins.tasks import Autoreloader
----> 7 from kolibri.core.content.hooks import ShareFileHook
      8 from kolibri.core.device.hooks import CheckIsMeteredHook
      9 from kolibri.core.device.hooks import GetOSUserHook

ImportError: cannot import name 'ShareFileHook' from 'kolibri.core.content.hooks' (/home/jacob/LE/krakens/kolibri.worktrees/basic-layout-for-lesson-resources/kolibri/core/content/hooks.py)

---

However, when I run it while enabling plugins, I get errors - tried putting the flag in a couple places but the error persists.

 kolibri --pythonpath integration_testing/development_plugin/ plugin integration_testing/development_plugin enable integration_testing.development_plugin
Usage: kolibri [OPTIONS] COMMAND [ARGS]...
Try 'kolibri --help' for help.

Error: No such option: --pythonpath

 kolibri plugin enable integration_testing.development_plugin --pythonpath integration_testing/development_plugin
Usage: kolibri plugin enable [OPTIONS] [PLUGIN_NAMES]...
Try 'kolibri plugin enable --help' for help.

Error: No such option: --pythonpath

[rtibbles]

OK, this is working with the currently correct invocation:

kolibri plugin --pythonpath ./integration_testing enable development_plugin

As at the moment, the pythonpath parameter is only accepted by the plugin command, not any of the subcommands.

I am going to update it now, to allow for this as well:

kolibri plugin enable development_plugin --pythonpath ./integration_testing

Note that when setting the pythonpath, you set it to the folder that the module is in, so that the module is discoverable.

[nucleogenesis]

Tested again and everything worked great for plugin enable/disable and in the shell.