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https://github.com/JesseTG/melonds-ds.git
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58 lines
3.0 KiB
CMake
Vendored
58 lines
3.0 KiB
CMake
Vendored
function(CreatePythonVenv venv_dest venv_name out_venv_executable)
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# Creates a virtual environment within the binary directory, with the given input name. Returns the path to the
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# virtual environments python executable for use else where. Optional argument of path to a requirements.txt, if
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# given will attempt to install/update within virtual environment.
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## ARGUMENTS
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# venv_dest - Input the destination path for the virtual environment to be created within
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# venv_name - Input name of the virtual environment to create in the binary directory
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# out_venv_executable - Variable to be set in the parent scope, holds path to virtual environment executable
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## OPTIONAL
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# requirements_path - Optional input of path to requirements.txt
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# create variable for venv path from input
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SET(VENV_PATH "${venv_dest}/${venv_name}")
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# if path doesn't exist, create the virtual environment
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if (NOT EXISTS ${VENV_PATH})
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FIND_PACKAGE(Python3 COMPONENTS Interpreter)
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MESSAGE(STATUS "Creating Python virtual environment at ${VENV_PATH} with ${Python3_EXECUTABLE}")
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EXECUTE_PROCESS(COMMAND ${Python3_EXECUTABLE} "-m" "venv" ${venv_name}
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WORKING_DIRECTORY ${venv_dest}
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ECHO_OUTPUT_VARIABLE ECHO_ERROR_VARIABLE)
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endif()
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# check if virtual environment was made successfully/already exists (path exists)
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if (EXISTS ${VENV_PATH})
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# unset python executable
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UNSET(Python3_EXECUTABLE)
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# make cmake find the python executable in virtual environment instead
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SET(ENV{VIRTUAL_ENV} ${VENV_PATH})
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SET(Python3_FIND_VIRTUALENV FIRST)
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SET(Python3_FIND_REGISTRY NEVER)
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SET(CMAKE_FIND_FRAMEWORK NEVER)
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FIND_PACKAGE(Python3 COMPONENTS Interpreter Development)
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# make a regex that can be used to check whether a path is within the venv
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# need to replace escape all special regex characters in the path
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string(REGEX REPLACE "([][+.*()^])" "\\\\\\1" VENV_PATH_AS_REGEX "${VENV_PATH}")
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SET(IN_VENV_REGEX "${VENV_PATH_AS_REGEX}/+")
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# If python executable found in the venv path
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if (Python3_FOUND AND Python3_EXECUTABLE MATCHES "${IN_VENV_REGEX}")
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# set return variable in parent scope
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SET(venv_executable "${Python3_EXECUTABLE}")
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SET(${out_venv_executable} "${venv_executable}" PARENT_SCOPE)
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# if given path to requirements.txt try install/update them
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if (DEFINED ARGV3)
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MESSAGE(STATUS "Checking/installing python requirements")
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EXECUTE_PROCESS(COMMAND ${venv_executable} -m pip install --upgrade pip setuptools -q)
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EXECUTE_PROCESS(COMMAND ${venv_executable} -m pip install --upgrade -r "${ARGV3}" -q)
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MESSAGE(STATUS "Python requirements updated")
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endif()
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else()
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MESSAGE(WARNING "Python virtual environment creation failed.")
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endif()
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endif()
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endfunction() |