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