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# * Macro to find a python module
#
# Usage: find_python_module (module [VERSION] [REQUIRED])
#
# Copyright 2005-2018 Airbus-EDF-IMACS-Phimeca
#
# Distributed under the OSI-approved BSD License (the "License"); see accompanying file
# Copyright.txt for details in:
#
# https://github.com/openturns/otsubsetinverse/blob/master/cmake/FindPythonModule.cmake
macro(nrn_find_python_module module)
string(TOUPPER ${module} module_upper)
if(NOT ${module_upper}_FOUND)
# parse arguments
set(${module}_FIND_OPTIONAL TRUE)
if(${ARGC} EQUAL 2)
if(${ARGV1} MATCHES REQUIRED)
set(${module}_FIND_OPTIONAL FALSE)
else()
set(${module}_FIND_VERSION ${ARGV1})
endif()
elseif(${ARGC} EQUAL 3)
if(${ARGV2} MATCHES REQUIRED)
set(${module}_FIND_OPTIONAL FALSE)
endif()
set(${module}_FIND_VERSION ${ARGV1})
endif()
# A module's location is usually a directory, but for binary modules it's a .so file.
execute_process(
COMMAND "${PYTHON_EXECUTABLE}" "-c"
"import re, ${module}; print(re.compile('/__init__.py.*').sub('',${module}.__file__))"
RESULT_VARIABLE _${module}_status
OUTPUT_VARIABLE _${module}_location
ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
if(NOT _${module}_status)
set(${module_upper}_LOCATION
${_${module}_location}
CACHE STRING "Location of Python module ${module}")
# retrieve version
execute_process(
COMMAND "${PYTHON_EXECUTABLE}" "-c" "import ${module}; print(${module}.__version__)"
RESULT_VARIABLE _${module}_status
OUTPUT_VARIABLE _${module}_version
ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
set(_${module_upper}_VERSION_MATCH TRUE)
if(NOT _${module}_status)
set(${module_upper}_VERSION_STRING ${_${module}_version})
if(${module}_FIND_VERSION)
if(${module}_FIND_VERSION VERSION_GREATER ${module_upper}_VERSION_STRING)
set(_${module_upper}_VERSION_MATCH FALSE)
endif()
endif()
mark_as_advanced(${module_upper}_VERSION_STRING)
endif()
endif()
find_package_handle_standard_args(
${module}
REQUIRED_VARS ${module_upper}_LOCATION _${module_upper}_VERSION_MATCH
VERSION_VAR ${module_upper}_VERSION_STRING)
if(NOT ${module}_FIND_OPTIONAL AND NOT _${module_upper}_VERSION_MATCH)
message(FATAL_ERROR "Missing python module ${module}")
endif()
mark_as_advanced(${module_upper}_LOCATION)
endif(NOT ${module_upper}_FOUND)
endmacro(nrn_find_python_module)
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