obs-studio/shared/obs-scripting/obspython/CMakeLists.txt

cmake_minimum_required(VERSION 3.22...3.25)

legacy_check()

if(POLICY CMP0078)
  cmake_policy(SET CMP0078 NEW)
endif()

if(POLICY CMP0086)
  cmake_policy(SET CMP0086 NEW)
endif()

if(POLICY CMP0094)
  cmake_policy(SET CMP0094 NEW)
endif()

if(OS_LINUX
   OR OS_FREEBSD
   OR OS_OPENBSD)
  find_package(Python 3.8 REQUIRED Interpreter Development)
else()
  find_package(Python 3.8...<3.12 REQUIRED Interpreter Development)
endif()
find_package(SWIG 4 REQUIRED)

include(UseSWIG)

set_source_files_properties(obspython.i PROPERTIES USE_TARGET_INCLUDE_DIRECTORIES TRUE
                                                   SWIG_FLAGS $<$<PLATFORM_ID:Windows,Darwin>:-py3-stable-abi>)

swig_add_library(
  obspython
  LANGUAGE python
  TYPE MODULE
  SOURCES obspython.i)

add_library(OBS::python ALIAS obspython)

file(
  GENERATE
  OUTPUT $<$<PLATFORM_ID:Windows>:$<CONFIG>/>obspython.h
  CONTENT "#pragma once\n\n#define PYTHON_LIB \"$<TARGET_LINKER_FILE_NAME:Python::Python>\"\n")

target_include_directories(
  obspython PRIVATE "$<$<PLATFORM_ID:Windows>:${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>>"
                    "$<$<PLATFORM_ID:Darwin>:$<TARGET_PROPERTY:Python::Python,INTERFACE_INCLUDE_DIRECTORIES>>")

target_compile_options(
  obspython
  PRIVATE $<$<PLATFORM_ID:Windows>:/wd4100>
          $<$<PLATFORM_ID:Windows>:/wd4197>
          $<$<COMPILE_LANG_AND_ID:C,AppleClang,Clang,GNU>:-Wno-unused-parameter>
          $<$<COMPILE_LANG_AND_ID:C,AppleClang,Clang>:-Wno-macro-redefined>
          $<$<COMPILE_LANG_AND_ID:C,AppleClang,Clang>:-Wno-unreachable-code>)

target_compile_definitions(obspython PRIVATE SWIG_TYPE_TABLE=obspython Py_ENABLE_SHARED=1
                                             SWIG_PYTHON_INTERPRETER_NO_DEBUG $<$<BOOL:${ENABLE_UI}>:ENABLE_UI>)

target_link_libraries(
  obspython PRIVATE OBS::cstrcache OBS::libobs OBS::scripting $<$<BOOL:${ENABLE_UI}>:OBS::frontend-api>
                    $<$<NOT:$<PLATFORM_ID:Darwin>>:Python::Python>)

target_link_options(obspython PRIVATE $<$<PLATFORM_ID:Darwin>:LINKER:-undefined,dynamic_lookup>)

if(MSVC OR XCODE)
  add_custom_command(
    TARGET obspython
    POST_BUILD
    COMMAND "${CMAKE_COMMAND}" -E copy "${CMAKE_CURRENT_BINARY_DIR}/obspython.py"
            "${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/obspython.py"
    VERBATIM)
endif()

set_property(
  TARGET obspython
  APPEND
  PROPERTY SWIG_COMPILE_DEFINITIONS "SWIG_TYPE_TABLE=obspython" "Py_ENABLE_SHARED=1" "SWIG_PYTHON_INTERPRETER_NO_DEBUG"
           "$<$<BOOL:${ENABLE_UI}>:ENABLE_UI>" "$<$<PLATFORM_ID:Windows>:MS_NO_COREDLL>")

# cmake-format: off
set_target_properties_obs(obspython PROPERTIES FOLDER scripting PREFIX "_" XCODE_ATTRIBUTE_STRIP_STYLE non-global)
# cmake-format: on