Import issues in editable install when using complicated `wheel.packages` options

[dmitry-kabanov]

I have a problem with imports when using an editable installation versus a normal installation (this one does not have issues).

The project has a complicated structure and uses namespace packages (keeps different subpackages in different paths, but they logically form a single package when using import in Python).

During the build, the subpackages are brought from different places together:

[tool.scikit-build.wheel.packages]
"oif" = "oif/lang_python/oif"
"oif/examples" = "examples"
"oif/interfaces" = "oif/interfaces/python/oif/interfaces"
"oif/_impl" = "oif_impl/_impl"
"oif/_impl/interfaces" = "oif_impl/lang_python/oif/_impl/interfaces"

and after pip install ....tar.gz, everything works: I can do, e.g., from oif._impl import ....

However, to develop the package further I need an editable install, and it does not work somehow.
I also see that the installed .pth file does not help any how because it does not take into an account the restructuring of directories during the build step.

Is it a normal behavior?

[LecrisUT]

I believe we do not support namespace package in editable mode. #808 is trying to address part of it