[CMake] CTest and PYTHONPATH

[Michael Wild]

On 12/14/2010 05:00 PM, Anders Wang Kristensen wrote:
> Hi,
> 
> I'm having some trouble setting PYTHONPATH in order to test a python
> extension module built with cmake.
> Currently I do the following:
> 
> add_test(NAME py_test COMMAND ${PYTHON_EXECUTABLE}
>     ${CMAKE_CURRENT_SOURCE_DIR}/test_runner.py)
> 
> if (CMAKE_CONFIGURATION_TYPES)
>   set (PY_DIR ${CMAKE_BINARY_DIR}/bin/${CMAKE_CFG_INTDIR})
> else ()
>   set (PY_DIR ${CMAKE_BINARY_DIR}/bin)
> endif ()
> 
> set_tests_properties(py_test
>     PROPERTIES ENVIRONMENT "PYTHONPATH=${PY_DIR}")
> 
> The problem is that ${CMAKE_CFG_INTDIR} doesn't get parsed fully, so
> PY_DIR expands to ../vs10x64/bin/$(Configuration), which obviously
> doesn't work.
> Searching this mailing list, I can see that other people have had
> trouble with this, but I'm unsure what to do in my case.
> 
> Should I use $<CONFIGURATION> and pass arguments to add_test or ... ?
> 
> kind regards
> Anders

Yes, pass $<CONFIGURATION> as an argument to your test_runner.py and in
there do sys.path.insert(0, "path/to/your/package") to adjust the search
path. Be prepared for the case where $<CONFIGURATION> is empty.

Michael