Klipper Loader to allow extras out of box

klippy-loader.py

#!/usr/bin/env python

import sys
import os
import fnmatch
import klippy

klippy_path = os.path.dirname(klippy.__file__)
matching_path = os.path.join(klippy_path, 'extras', '*.py')

org_exists = os.path.exists
def new_os_path_exists(path):
    if org_exists(path):
        return True

    if fnmatch.fnmatch(path, matching_path):
        module_path = os.path.relpath(path, klippy_path)
        for sys_path in sys.path:
            if sys_path == klippy_path:
                break
            if org_exists(os.path.join(sys_path, module_path)):
                return True
    return False

os.path.exists = new_os_path_exists

if __name__ == '__main__':
    klippy.main()

Run:

PYTHONPATH=/path/to/dir/with/modules:/path/to/klipper/klippy ./klippy-loader.py

When using [hello_world] it will look for module in a following order:

• /path/to/dir/with/modules/extras/hello_world.py
• /path/to/dir/with/modules/extras/hello_world/__init__.py
• /path/to/klipper/klippy/extras/hello_world.py
• /path/to/klipper/klippy/extras/hello_world/__init__.py

It will start Klipper from /path/to/klipper/klippy/klippy.py folder.