tests: update uninstall test for protobuf dependency

[herheliuk]

Protobuf is now installed into the Python environment, so its dist-info
metadata files are expected to remain after uninstall. The test was updated
to ignore them.

Signed-off-by: Andrii Herheliuk [email protected]

[rst0git]

Thanks for the PR but we need to use a different approach to solve this issue (see 4f15fe8).

[herheliuk]

@rst0git, the commit you quoted doesn't seem to help...

5d336e0 (current PR) passes the tests ^^ and honestly, I don't see any different way to do this.

[rst0git]

@herheliuk The problem we need to solve is to avoid installing protobuf via pip when it has already been installed via RPM/DEB package (e.g., python3-protobuf). For example, in the CI test protobuf is already installed as a package, but make would install a newer version via pip and this results in files left after uninstall.

[herheliuk]

this can be done with pip -c (constraints)

# Detect system Python packages and create a pip constraints file.
# This ensures pip does not reinstall system-provided packages (like python3-protobuf).
PIP_CONSTRAINTS := /tmp/pip_system_constraints.txt

$(PIP_CONSTRAINTS):
	@$(E) "  GEN      " pip constraints
	@$(PYTHON) -m pip list --format=freeze > $(PIP_CONSTRAINTS)

lib/Makefile

ifeq ($(SKIP_PIP_INSTALL),0)
	$(E) "  INSTALL " pycriu
	$(Q) $(PYTHON) -m pip install $(PIPFLAGS) -c $(PIP_CONSTRAINTS) --prefix=$(DESTDIR)$(PREFIX) ./lib
else
	$(E) " SKIP INSTALL pycriu"
endif

[herheliuk]

doesn't seem to work unfortunately.

[rst0git]

I've opened the following PR to fix this: #2792