48 lines
1.6 KiB
CMake
48 lines
1.6 KiB
CMake
function(find_python_module module module_u)
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if(${module_u}_FOUND)
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return()
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endif()
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# do not override user-specified values
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if(NOT ${module_u}_PATH)
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# set the default in case nothing is found
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set("${module_u}_PATH" "" CACHE STRING "Path to ${module}." FORCE)
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# A module's location is usually a directory, but for binary modules
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# it's an .so file.
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execute_process(COMMAND "${PYTHON_EXECUTABLE}" "-c"
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"import os, re, ${module}; print(os.path.dirname(\
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re.compile('/__init__.py.*').sub('',${module}.__file__)))"
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RESULT_VARIABLE "${module_u}_RESULT"
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OUTPUT_VARIABLE "${module_u}_OUTPUT"
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ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
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# strip module directories to get the base path
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# abc.foo.bar.xyz -> ... (three dots)
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string(REGEX REPLACE "[^\\.]+" "" module_strip "${module}")
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string(LENGTH "${module_strip}" module_strip)
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# strip ${module_strip} times the final directory from path
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if(module_strip GREATER 0)
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# CMake's loops are inclusive so start at 1
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foreach(module_strip_i RANGE 1 ${module_strip})
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string(REGEX REPLACE "/[^/]+$" ""
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"${module_u}_OUTPUT" "${${module_u}_OUTPUT}")
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endforeach(module_strip_i)
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endif()
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# if the exit code (RESULT) is non-zero python couldn't import module
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if(NOT ${module_u}_RESULT)
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set("${module_u}_PATH" "${${module_u}_OUTPUT}" CACHE STRING
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"Path to ${module}." FORCE)
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endif()
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endif()
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if(NOT ${module_u}_PATH)
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message(FATAL_ERROR "Could not find ${module}.")
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endif()
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set(${module_u}_FOUND ON CACHE BOOL "Found ${module}.")
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mark_as_advanced(${module_u}_FOUND)
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message(STATUS "Found ${module}: ${${module_u}_PATH}")
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endfunction(find_python_module)
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