68 lines
2.2 KiB
CMake
68 lines
2.2 KiB
CMake
# -*- cmake -*-
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set(PYTHONINTERP_FOUND)
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if (DEFINED ENV{PYTHON})
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# Allow python executable to be explicitly set
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set(python "$ENV{PYTHON}")
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set(PYTHONINTERP_FOUND ON)
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elseif (WINDOWS)
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# On Windows, explicitly avoid Cygwin Python.
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if (DEFINED ENV{VIRTUAL_ENV})
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find_program(PYTHON_EXECUTABLE
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NAMES python.exe
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PATHS
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"$ENV{VIRTUAL_ENV}\\scripts"
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NO_DEFAULT_PATH
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)
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else()
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# if the user has their own version of Python installed, prefer that
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foreach(hive HKEY_CURRENT_USER HKEY_LOCAL_MACHINE)
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# prefer more recent Python versions to older ones, if multiple versions
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# are installed
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foreach(pyver 3.11 3.10 3.9)
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list(APPEND regpaths "[${hive}\\SOFTWARE\\Python\\PythonCore\\${pyver}\\InstallPath]")
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endforeach()
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endforeach()
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# TODO: This logic has the disadvantage that if you have multiple versions
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# of Python installed, the selected path won't necessarily be the newest -
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# e.g. this GLOB will prefer Python310 to Python311. But since pymaybe is
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# checked AFTER the registry entries, this will only surface as a problem if
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# no installed Python appears in the registry.
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file(GLOB pymaybe
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"$ENV{PROGRAMFILES}/Python*"
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## "$ENV{PROGRAMFILES(X86)}/Python*"
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# The Windows environment variable is in fact as shown above, but CMake
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# disallows querying an environment variable containing parentheses -
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# thanks, Windows. Fudge by just appending " (x86)" to $PROGRAMFILES and
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# hoping for the best.
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"$ENV{PROGRAMFILES} (x86)/Python*"
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"c:/Python*")
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set(Python3_FIND_REGISTRY "LAST")
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find_program(python
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NAMES python3.exe python.exe
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NO_DEFAULT_PATH # added so that cmake does not find cygwin python
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PATHS
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${regpaths}
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${pymaybe}
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)
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endif()
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find_package(Python3 COMPONENTS Interpreter)
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else()
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find_program(python python3)
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if (python)
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set(PYTHONINTERP_FOUND ON)
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endif (python)
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endif (DEFINED ENV{PYTHON})
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if (NOT python)
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message(FATAL_ERROR "No Python interpreter found")
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endif (NOT python)
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set(PYTHON_EXECUTABLE "${python}" CACHE FILEPATH "Python interpreter for builds")
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mark_as_advanced(PYTHON_EXECUTABLE)
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