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# - Macro to find a python module
#
# Usage:
# include (FindPythonModule)
# find_python_module (module [VERSION] [REQUIRED])
#
# The following variables are defined:
# MODULE_FOUND - true if found
# MODULE_LOCATION - directory of the module, or it's library file if binary module
# MODULE_VERSION_STRING - module version, if available through __version__
#
#=============================================================================
# Copyright 2005-2025 Airbus-EDF-IMACS-ONERA-Phimeca
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distributed this file outside of CMake, substitute the full
# License text for the above reference.)
macro (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 (${module_upper}_VERSION_STRING)
endif ()
endif ()
# https://gitlab.kitware.com/cmake/cmake/-/issues/21505
if (CMAKE_VERSION VERSION_EQUAL 3.19.1)
set (CMAKE_FIND_PACKAGE_NAME "${module}")
endif ()
find_package_handle_standard_args (${module} REQUIRED_VARS ${module_upper}_LOCATION
${module}_FIND_OPTIONAL
_${module_upper}_VERSION_MATCH
VERSION_VAR ${module_upper}_VERSION_STRING
)
mark_as_advanced (${module_upper}_LOCATION)
endif (NOT ${module_upper}_FOUND)
endmacro (find_python_module)
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