76 lines
3.2 KiB
CMake
76 lines
3.2 KiB
CMake
cmake_minimum_required(VERSION 3.3.0 FATAL_ERROR)
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# prevent multiple inclusion
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if(DEFINED REFLECTION_GENERATOR_MODULE_LOADED)
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return()
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endif()
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set(REFLECTION_GENERATOR_MODULE_LOADED YES)
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# find code generator
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set(DEFAULT_REFLECTION_GENERATOR_EXECUTABLE "reflective_rapidjson_generator")
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set(CUSTOM_REFLECTION_GENERATOR_EXECUTABLE "" CACHE FILEPATH "path to executable of reflection generator")
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if(CUSTOM_REFLECTION_GENERATOR_EXECUTABLE)
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# use custom generator executable
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if(NOT FILE "${CUSTOM_REFLECTION_GENERATOR_EXECUTABLE}")
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message(FATAL_ERROR "The specified code generator executable \"${CUSTOM_REFLECTION_GENERATOR_EXECUTABLE}\" does not exist.")
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endif()
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set(REFLECTION_GENERATOR_EXECUTABLE "${CUSTOM_REFLECTION_GENERATOR_EXECUTABLE}")
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elseif(CMAKE_CROSSCOMPILING OR NOT TARGET "${DEFAULT_REFLECTION_GENERATOR_EXECUTABLE}")
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# find native/external "reflective_rapidjson_generator"
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find_program(REFLECTION_GENERATOR_EXECUTABLE "${DEFAULT_REFLECTION_GENERATOR_EXECUTABLE}")
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else()
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# use "reflective_rapidjson_generator" target
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set(REFLECTION_GENERATOR_EXECUTABLE "${DEFAULT_REFLECTION_GENERATOR_EXECUTABLE}")
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endif()
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if(NOT REFLECTION_GENERATOR_EXECUTABLE)
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message(FATAL_ERROR "Unable to find executable of generator for reflection code.")
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endif()
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# define helper functions
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include(CMakeParseArguments)
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function(add_reflection_generator_invocation)
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# parse arguments
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set(OPTIONAL_ARGS)
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set(ONE_VALUE_ARGS OUTPUT_DIRECTORY JSON_VISIBILITY)
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set(MULTI_VALUE_ARGS INPUT_FILES GENERATORS OUTPUT_LISTS CLANG_OPTIONS JSON_CLASSES)
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cmake_parse_arguments(ARGS "${OPTIONAL_ARGS}" "${ONE_VALUE_ARGS}" "${MULTI_VALUE_ARGS}" ${ARGN})
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# determine file name or file path if none specified
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if(NOT ARGS_OUTPUT_DIRECTORY)
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set(ARGS_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/reflection")
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file(MAKE_DIRECTORY "${ARGS_OUTPUT_DIRECTORY}")
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endif()
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foreach(INPUT_FILE ${ARGS_INPUT_FILES})
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get_filename_component(OUTPUT_NAME "${INPUT_FILE}" NAME_WE)
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set(OUTPUT_FILE "${ARGS_OUTPUT_DIRECTORY}/${OUTPUT_NAME}.h")
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message(STATUS "Adding generator command for ${INPUT_FILE} producing ${OUTPUT_FILE}")
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set(CLI_ARGUMENTS
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--output-file "${OUTPUT_FILE}"
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--input-file "${INPUT_FILE}"
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--generators ${ARGS_GENERATORS}
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--clang-opt ${ARGS_CLANG_OPTIONS}
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--json-classes ${ARGS_JSON_CLASSES}
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)
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if(ARGS_JSON_VISIBILITY)
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list(APPEND CLI_ARGUMENTS --json-visibility "${ARGS_JSON_VISIBILITY}")
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endif()
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add_custom_command(
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OUTPUT "${OUTPUT_FILE}"
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COMMAND "${REFLECTION_GENERATOR_EXECUTABLE}"
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ARGS ${CLI_ARGUMENTS}
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DEPENDS "${INPUT_FILE}"
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WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
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COMMENT "Generating reflection code for ${INPUT_FILE}"
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)
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# append the output file to lists specified via OUTPUT_LISTS
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if(ARGS_OUTPUT_LISTS)
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foreach(OUTPUT_LIST ${ARGS_OUTPUT_LISTS})
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list(APPEND "${OUTPUT_LIST}" "${OUTPUT_FILE}")
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set("${OUTPUT_LIST}" "${${OUTPUT_LIST}}" PARENT_SCOPE)
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endforeach()
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endif()
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endforeach()
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endfunction()
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