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[cmake] Send error for OPM_ENABLE_PYTHON=ON without setuptools

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Compiling will fail at a very late stage and might cause surprises
for novice users. It seems much better to issue an error in CMake with
a meaningful error message. Might prevent some support issues in the
future.
This commit is contained in:
Markus Blatt 2022-03-15 11:27:42 +01:00
parent 2da0f48da2
commit af052ef3ba
1 changed files with 12 additions and 0 deletions
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12
CMakeLists.txt
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@ -199,6 +199,18 @@ if (OPM_ENABLE_PYTHON)
else()
find_package(Python3 REQUIRED COMPONENTS Interpreter)
endif()
# Make sure we fail gracefully here without setuptool
execute_process(COMMAND ${Python3_EXECUTABLE} -c "import setuptools"
WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
ERROR_VARIABLE SETUPTOOL_ERROR OUTPUT_VARIABLE SETUPTOOL_OUT
RESULT_VARIABLE SETUPTOOL_RESULT)
if(SETUPTOOL_RESULT GREATER 0)
message(WARNING "Trying to test setuptools resulted in error message: ${SETUPTOOL_ERROR}")
message(SEND_ERROR "To build the python bindings you need to install setuptool. "
"Either use \"apt-get install python3-setuptools\" (on Debian/Ubuntu) "
"or \"pip install setuptools\"")
endif()
# Compatibility settings for PythonInterp and PythonLibs
# used e.g. in FindCwrap, pybind11
set(PYTHON_EXECUTABLE ${Python3_EXECUTABLE})