PrimeWorldEditor/dew.cmake

110 lines
3.6 KiB
CMake

#
# Dew Cmake Bootstrap + functionality module
# https://github.com/sfuller/dew
#
# It is not recommended to modify this file, as it may need to be updated to ensure future dew version compatibility.
#
# It is encouraged to check this file into your project's VCS. Doing so will allow your cmake project to easily
# integrate with Dew.
#
cmake_minimum_required(VERSION 3.2)
function(integrate_dew)
#
# Skip everything if we are building from dew
#
if ($ENV{INVOKED_BY_DEW})
return()
endif()
#
# Advise the user that setting the build type is necessary for debug dependencies.
#
if (NOT CMAKE_BUILD_TYPE)
message(WARNING "CMAKE_BUILD_TYPE is not set. Dew will build release dependencies by default.")
endif()
#
# Acquaint CMake with dew prefix
#
if ("${CMAKE_BUILD_TYPE}" STREQUAL Debug)
set(dew_cmake_prefix_suffix debug)
else()
set(dew_cmake_prefix_suffix release)
endif()
#
# Run dew update
#
option(DEW_AUTOUPDATE "Automatically update dew prefixes as part of cmake generation." ON)
if (DEW_AUTOUPDATE)
find_package(Python3 COMPONENTS Interpreter REQUIRED)
message(STATUS "Installing dew")
execute_process(
COMMAND "${Python3_EXECUTABLE}" -m pip install --user dew-pacman
RESULT_VARIABLE install_dew_result
)
if (NOT install_dew_result EQUAL 0)
message(FATAL_ERROR "Failed to install dew with pip: result: ${install_dew_result}.")
endif()
message(STATUS "Building dew dependencies")
execute_process(COMMAND "${Python3_EXECUTABLE}" -m dew update --CC "${CMAKE_C_COMPILER}"
--CXX "${CMAKE_CXX_COMPILER}" --build-type ${dew_cmake_prefix_suffix}
WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
RESULT_VARIABLE dew_res)
if(NOT dew_res EQUAL 0)
message(FATAL_ERROR "Unable to run dew: ${dew_res}")
endif()
endif()
set(dew_output_path "${CMAKE_CURRENT_SOURCE_DIR}/.dew")
set(dew_cmake_prefix_path "${dew_output_path}/prefix-${dew_cmake_prefix_suffix}")
set(dew_cmake_module_path "${dew_cmake_prefix_path}/share/cmake/Modules")
#
# Create a warning and return early if dew directory does not exist.
#
if (NOT EXISTS "${dew_output_path}")
message(WARNING "Could not find .dew directory. Please follow the project's instructions for installing and running dew.")
return()
endif()
#
# Check if we have already added the dew directory to CMAKE_PREFIX_PATH
#
set(needs_new_prefix TRUE)
foreach (path ${CMAKE_PREFIX_PATH})
if (path STREQUAL "${dew_cmake_prefix_path}")
set(needs_new_prefix FALSE)
break()
endif()
endforeach()
#
# Check if we have already added the dew cmake module directory to CMAKE_MODULE_PATH
#
set(needs_new_module_path TRUE)
foreach (path ${CMAKE_MODULE_PATH})
if (path STREQUAL "${dew_cmake_module_path}")
set(needs_new_module_path FALSE)
break()
endif()
endforeach()
#
# Add dew directory to CMAKE_PREFIX_PATH if necesary
#
if ("${needs_new_prefix}")
set(CMAKE_PREFIX_PATH ${CMAKE_PREFIX_PATH} "${dew_cmake_prefix_path}" CACHE PATH "" FORCE)
endif()
#
# Add dew cmake module directory to CMAKE_MODULE_PATH if necesary
#
if ("${needs_new_module_path}")
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${dew_cmake_module_path}" CACHE PATH "" FORCE)
endif()
set(DEW_CMAKE_PREFIX_PATH ${dew_cmake_prefix_path} PARENT_SCOPE)
endfunction()