Custom usb.backend.libusb1 backend lookup doesn't work with pyinstaller (Mac OSX apple silicon).

[zapta]

We have python code that lookup at runtime for a libusb backend (library) file and uses it. The code works with plain python but not with pyinstaller. The code uses a find_library callback function that lookups the file by lib name but it's not invoked at all when running with pyinstaller which results in no backend found.

Any idea how to fix it? (We prefer to be consistent and use the find_library() callback lookup also with pyinstaller, not packing the binary library with the pyinstaller bundle).

The app code:
https://github.com/zapta/apio-dev/blob/ee01a299bcf63068a78aca462a06e453603e2209/apio/commands/apio_labs.py#L84C1-L111C73

The .spec file
https://github.com/zapta/apio-dev/blob/ee01a299bcf63068a78aca462a06e453603e2209/.github/workflows/resources/apio-pyinstaller.spec#L3

The pyinstaller workflow:
https://github.com/zapta/apio-dev/blob/ee01a299bcf63068a78aca462a06e453603e2209/.github/workflows/build-darwin-arm64-installer.yml#L1

The pyinstaller workflow log:
https://hastebin.com/share/poqorelina.bash

[zapta]

The problem is in the usb runtime hook, it simplify ignores the find_library argument.

https://github.com/pyinstaller/pyinstaller-hooks-contrib/blob/3cc7a3a3df4a7b404ecf3fedfbcbe48980bd61f8/_pyinstaller_hooks_contrib/rthooks/pyi_rth_usb.py#L30

EDIT: Created this issue: pyinstaller/pyinstaller-hooks-contrib#912

EDIT: One workaround is deleting the 'usb' line from rthooks.dat before running pyinstaller