Infinite recursion when packaging a Mitsuba dependency with pyinstaller

[ThomasAuzinger]

pyinstaller can be used to package a Python script with all its dependencies into a single executable.

When using it on a python script that depends on Mitsuba (i.e., pyinstaller script.py -p . --collect-all mitsuba), it traverses all Mitsuba subpackages and runs into an infinite recursion via mitsuba, mitsuba.mitsuba_stubs, mitsuba.mitsuba_stubs.mitsuba_stubs, mitsuba.mitsuba_stubs.mitsuba_stubs.mitsuba_stubs, ...

A workaround is to enumerate the relevant subpackages of Mitsuba by hand:

pyinstaller script.py -p . 
  --collect-data mitsuba --collect-binaries mitsuba --collect-all mitsuba.test
  --collect-all mitsuba.ad --collect-all mitsuba.python --collect-all mitsuba.mitsuba_ext
  --collect-all mitsuba.llvm_ad_rgb --collect-all drjit

I do not think that there's anything to actually fix but I wanted to share this workaround in case anyone else runs into this problem.