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Add CreatePythonVenv.cmake

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- Taken from https://github.com/HarryMills/CMakeVenvGeneration
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Jesse Talavera 2024-05-31 15:54:25 -04:00
parent ea8599c12a
commit c5f2baaea4
2 changed files with 58 additions and 0 deletions
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1
.gitattributes vendored
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@ -2,4 +2,5 @@ cmake/toolchain/** linguist-vendored
cmake/GitInfo.cmake linguist-vendored
cmake/FindOpenGLES.cmake linguist-vendored
cmake/FindPythonModules.cmake linguist-vendored
cmake/CreatePythonVenv.cmake linguist-vendored
LICENSE text

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cmake/CreatePythonVenv.cmake vendored Normal file
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@ -0,0 +1,57 @@
function(CreatePythonVenv venv_dest venv_name out_venv_executable)
# Creates a virtual environment within the binary directory, with the given input name. Returns the path to the
# virtual environments python executable for use else where. Optional argument of path to a requirements.txt, if
# given will attempt to install/update within virtual environment.
## ARGUMENTS
# venv_dest - Input the destination path for the virtual environment to be created within
# venv_name - Input name of the virtual environment to create in the binary directory
# out_venv_executable - Variable to be set in the parent scope, holds path to virtual environment executable
## OPTIONAL
# requirements_path - Optional input of path to requirements.txt
# create variable for venv path from input
SET(VENV_PATH "${venv_dest}/${venv_name}")
# if path doesn't exist, create the virtual environment
if (NOT EXISTS ${VENV_PATH})
MESSAGE(STATUS "Creating Python virtual environment named: " ${venv_name})
FIND_PACKAGE(Python3 COMPONENTS Interpreter)
EXECUTE_PROCESS(COMMAND ${Python3_EXECUTABLE} "-m" "venv" ${venv_name}
WORKING_DIRECTORY ${venv_dest})
endif()
# check if virtual environment was made successfully/already exists (path exists)
if (EXISTS ${VENV_PATH})
# unset python executable
UNSET(Python3_EXECUTABLE)
# make cmake find the python executable in virtual environment instead
SET(ENV{VIRTUAL_ENV} ${VENV_PATH})
SET(Python3_FIND_VIRTUALENV FIRST)
SET(Python3_FIND_REGISTRY NEVER)
SET(CMAKE_FIND_FRAMEWORK NEVER)
FIND_PACKAGE(Python3 COMPONENTS Interpreter Development)
# make a regex that can be used to check whether a path is within the venv
# need to replace escape all special regex characters in the path
string(REGEX REPLACE "([][+.*()^])" "\\\\\\1" VENV_PATH_AS_REGEX "${VENV_PATH}")
SET(IN_VENV_REGEX "${VENV_PATH_AS_REGEX}/+")
# If python executable found in the venv path
if (Python3_FOUND AND Python3_EXECUTABLE MATCHES "${IN_VENV_REGEX}")
# set return variable in parent scope
SET(venv_executable "${Python3_EXECUTABLE}")
SET(${out_venv_executable} "${venv_executable}" PARENT_SCOPE)
# if given path to requirements.txt try install/update them
if (DEFINED ARGV3)
MESSAGE(STATUS "Checking/installing python requirements")
EXECUTE_PROCESS(COMMAND ${venv_executable} -m pip install --upgrade pip setuptools -q)
EXECUTE_PROCESS(COMMAND ${venv_executable} -m pip install --upgrade -r "${ARGV3}" -q)
MESSAGE(STATUS "Python requirements updated")
endif()
else()
MESSAGE(WARNING "Python virtual environment creation failed.")
endif()
endif()
endfunction()