SET (PythonInterp_FIND_VERSION 3)
SET (PythonInterp_FIND_VERSION_MAJOR 3)

MESSAGE ("-- Looking for Python3 build dependencies...")

UNSET (PYTHON_EXECUTABLE CACHE)

FIND_PACKAGE (PythonInterp REQUIRED)
EXECUTE_PROCESS(COMMAND ${PYTHON_EXECUTABLE} -c "from sys import stdout; from distutils import sysconfig; stdout.write(sysconfig.get_python_lib(True))" OUTPUT_VARIABLE PYTHON3_INSTALL_DIR)

IF (${PYTHON_VERSION_MAJOR} EQUAL 3)

UNSET (PYTHON_LIBRARY CACHE)
UNSET (PYTHON_DEBUG_LIBRARY CACHE)
UNSET (PYTHON_LIBRARIES CACHE)
UNSET (PYTHON_DEBUG_LIBRARIES CACHE)
UNSET (PYTHON_INCLUDE_DIR CACHE)
UNSET (PYTHON_INCLUDE_DIRS CACHE)
UNSET (PYTHON_INCLUDE_PATH CACHE)

SET (PythonLibs_FIND_VERSION ${PYTHON_VERSION_STRING})
SET (PythonLibs_FIND_VERSION_COUNT 3)
SET (PythonLibs_FIND_VERSION_MAJOR ${PYTHON_VERSION_MAJOR})
SET (PythonLibs_FIND_VERSION_MINOR ${PYTHON_VERSION_MINOR})
SET (PythonLibs_FIND_VERSION_EXACT TRUE)
FIND_PACKAGE (PythonLibs REQUIRED)
SET (PYTHON3_EXECUTABLE ${PYTHON_EXECUTABLE})
SET (PYTHON3_INCLUDE_PATH ${PYTHON_INCLUDE_PATH})

SET (SWIG_PY_FLAGS -DPYTHON3=1)

MESSAGE (STATUS "Python3 executable: ${PYTHON3_EXECUTABLE}")
MESSAGE (STATUS "Python3 installation dir: ${PYTHON3_INSTALL_DIR}")

ADD_CUSTOM_COMMAND (
    OUTPUT solv_python.c
    COMMAND ${SWIG_EXECUTABLE} ${SWIG_FLAGS} -python ${SWIG_PY_FLAGS} -I${CMAKE_SOURCE_DIR}/src -o solv_python.c ${CMAKE_SOURCE_DIR}/bindings/solv.i
    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
    DEPENDS ${CMAKE_SOURCE_DIR}/bindings/solv.i
)

ADD_DEFINITIONS(-Wno-unused)
INCLUDE_DIRECTORIES (${PYTHON3_INCLUDE_PATH})

ADD_LIBRARY (bindings_python3 SHARED solv_python.c)
SET_TARGET_PROPERTIES (bindings_python3 PROPERTIES PREFIX "" OUTPUT_NAME "_solv")
TARGET_LINK_LIBRARIES (bindings_python3 libsolvext libsolv ${SYSTEM_LIBRARIES})

INSTALL (TARGETS bindings_python3 LIBRARY DESTINATION ${PYTHON3_INSTALL_DIR})
INSTALL (FILES ${CMAKE_CURRENT_BINARY_DIR}/solv.py DESTINATION ${PYTHON3_INSTALL_DIR})

ELSE (${PYTHON_VERSION_MAJOR} EQUAL 3)

MESSAGE ("-- Skipping Python3 bindings, no Python3 interpreter found.")

ENDIF (${PYTHON_VERSION_MAJOR} EQUAL 3)