mirror of
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207 lines
8.0 KiB
CMake
207 lines
8.0 KiB
CMake
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#[[
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Add custom commands to process ``.proto`` files to C++::
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protobuf_generate_grpc_cpp(<SRCS> <HDRS>
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[DESCRIPTORS <DESC>] [EXPORT_MACRO <MACRO>] [<ARGN>...])
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``SRCS``
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Variable to define with autogenerated source files
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``HDRS``
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Variable to define with autogenerated header files
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``DESCRIPTORS``
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Variable to define with autogenerated descriptor files, if requested.
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``EXPORT_MACRO``
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is a macro which should expand to ``__declspec(dllexport)`` or
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``__declspec(dllimport)`` depending on what is being compiled.
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``ARGN``
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``.proto`` files
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#]]
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# Function to generate C++ files from .proto files.
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# This function is a modified version of the function PROTOBUF_GENERATE_CPP() copied from https://github.com/Kitware/CMake/blob/master/Modules/FindProtobuf.cmake.
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function(PROTOBUF_GENERATE_GRPC_CPP SRCS HDRS)
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cmake_parse_arguments(protobuf_generate_grpc_cpp "" "EXPORT_MACRO;DESCRIPTORS" "" ${ARGN})
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set(_proto_files "${protobuf_generate_grpc_cpp_UNPARSED_ARGUMENTS}")
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if(NOT _proto_files)
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message(SEND_ERROR "Error: PROTOBUF_GENERATE_GRPC_CPP() called without any proto files")
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return()
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endif()
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if(PROTOBUF_GENERATE_GRPC_CPP_APPEND_PATH)
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set(_append_arg APPEND_PATH)
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endif()
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if(protobuf_generate_grpc_cpp_DESCRIPTORS)
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set(_descriptors DESCRIPTORS)
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endif()
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if(DEFINED PROTOBUF_IMPORT_DIRS AND NOT DEFINED Protobuf_IMPORT_DIRS)
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set(Protobuf_IMPORT_DIRS "${PROTOBUF_IMPORT_DIRS}")
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endif()
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if(DEFINED Protobuf_IMPORT_DIRS)
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set(_import_arg IMPORT_DIRS ${Protobuf_IMPORT_DIRS})
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endif()
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set(_outvar)
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protobuf_generate_grpc(${_append_arg} ${_descriptors} LANGUAGE cpp EXPORT_MACRO ${protobuf_generate_cpp_EXPORT_MACRO} OUT_VAR _outvar ${_import_arg} PROTOS ${_proto_files})
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set(${SRCS})
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set(${HDRS})
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if(protobuf_generate_grpc_cpp_DESCRIPTORS)
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set(${protobuf_generate_grpc_cpp_DESCRIPTORS})
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endif()
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foreach(_file ${_outvar})
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if(_file MATCHES "cc$")
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list(APPEND ${SRCS} ${_file})
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elseif(_file MATCHES "desc$")
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list(APPEND ${protobuf_generate_grpc_cpp_DESCRIPTORS} ${_file})
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else()
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list(APPEND ${HDRS} ${_file})
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endif()
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endforeach()
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set(${SRCS} ${${SRCS}} PARENT_SCOPE)
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set(${HDRS} ${${HDRS}} PARENT_SCOPE)
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if(protobuf_generate_grpc_cpp_DESCRIPTORS)
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set(${protobuf_generate_grpc_cpp_DESCRIPTORS} "${${protobuf_generate_grpc_cpp_DESCRIPTORS}}" PARENT_SCOPE)
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endif()
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endfunction()
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# Helper function.
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# This function is a modified version of the function protobuf_generate() copied from https://github.com/Kitware/CMake/blob/master/Modules/FindProtobuf.cmake.
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function(protobuf_generate_grpc)
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set(_options APPEND_PATH DESCRIPTORS)
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set(_singleargs LANGUAGE OUT_VAR EXPORT_MACRO PROTOC_OUT_DIR)
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if(COMMAND target_sources)
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list(APPEND _singleargs TARGET)
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endif()
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set(_multiargs PROTOS IMPORT_DIRS GENERATE_EXTENSIONS)
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cmake_parse_arguments(protobuf_generate_grpc "${_options}" "${_singleargs}" "${_multiargs}" "${ARGN}")
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if(NOT protobuf_generate_grpc_PROTOS AND NOT protobuf_generate_grpc_TARGET)
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message(SEND_ERROR "Error: protobuf_generate_grpc called without any targets or source files")
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return()
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endif()
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if(NOT protobuf_generate_grpc_OUT_VAR AND NOT protobuf_generate_grpc_TARGET)
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message(SEND_ERROR "Error: protobuf_generate_grpc called without a target or output variable")
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return()
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endif()
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if(NOT protobuf_generate_grpc_LANGUAGE)
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set(protobuf_generate_grpc_LANGUAGE cpp)
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endif()
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string(TOLOWER ${protobuf_generate_grpc_LANGUAGE} protobuf_generate_grpc_LANGUAGE)
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if(NOT protobuf_generate_grpc_PROTOC_OUT_DIR)
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set(protobuf_generate_grpc_PROTOC_OUT_DIR ${CMAKE_CURRENT_BINARY_DIR})
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endif()
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if(protobuf_generate_grpc_EXPORT_MACRO AND protobuf_generate_grpc_LANGUAGE STREQUAL cpp)
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set(_dll_export_decl "dllexport_decl=${protobuf_generate_grpc_EXPORT_MACRO}:")
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endif()
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if(NOT protobuf_generate_grpc_GENERATE_EXTENSIONS)
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if(protobuf_generate_grpc_LANGUAGE STREQUAL cpp)
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set(protobuf_generate_grpc_GENERATE_EXTENSIONS .pb.h .pb.cc .grpc.pb.h .grpc.pb.cc)
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elseif(protobuf_generate_grpc_LANGUAGE STREQUAL python)
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set(protobuf_generate_grpc_GENERATE_EXTENSIONS _pb2.py)
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else()
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message(SEND_ERROR "Error: protobuf_generate_grpc given unknown Language ${LANGUAGE}, please provide a value for GENERATE_EXTENSIONS")
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return()
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endif()
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endif()
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if(NOT protobuf_generate_grpc_PLUGIN)
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if(protobuf_generate_grpc_LANGUAGE STREQUAL cpp)
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set(protobuf_generate_grpc_PLUGIN "grpc_cpp_plugin")
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elseif(protobuf_generate_grpc_LANGUAGE STREQUAL python)
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set(protobuf_generate_grpc_PLUGIN "grpc_python_plugin")
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else()
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message(SEND_ERROR "Error: protobuf_generate_grpc given unknown Language ${LANGUAGE}, please provide a value for PLUGIN")
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return()
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endif()
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endif()
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if(protobuf_generate_grpc_TARGET)
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get_target_property(_source_list ${protobuf_generate_grpc_TARGET} SOURCES)
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foreach(_file ${_source_list})
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if(_file MATCHES "proto$")
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list(APPEND protobuf_generate_grpc_PROTOS ${_file})
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endif()
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endforeach()
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endif()
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if(NOT protobuf_generate_grpc_PROTOS)
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message(SEND_ERROR "Error: protobuf_generate_grpc could not find any .proto files")
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return()
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endif()
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if(protobuf_generate_grpc_APPEND_PATH)
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# Create an include path for each file specified
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foreach(_file ${protobuf_generate_grpc_PROTOS})
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get_filename_component(_abs_file ${_file} ABSOLUTE)
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get_filename_component(_abs_path ${_abs_file} PATH)
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list(FIND _protobuf_include_path ${_abs_path} _contains_already)
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if(${_contains_already} EQUAL -1)
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list(APPEND _protobuf_include_path -I ${_abs_path})
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endif()
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endforeach()
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else()
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set(_protobuf_include_path -I ${CMAKE_CURRENT_SOURCE_DIR})
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endif()
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foreach(DIR ${protobuf_generate_grpc_IMPORT_DIRS})
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get_filename_component(ABS_PATH ${DIR} ABSOLUTE)
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list(FIND _protobuf_include_path ${ABS_PATH} _contains_already)
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if(${_contains_already} EQUAL -1)
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list(APPEND _protobuf_include_path -I ${ABS_PATH})
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endif()
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endforeach()
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set(_generated_srcs_all)
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foreach(_proto ${protobuf_generate_grpc_PROTOS})
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get_filename_component(_abs_file ${_proto} ABSOLUTE)
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get_filename_component(_abs_dir ${_abs_file} DIRECTORY)
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get_filename_component(_basename ${_proto} NAME_WE)
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file(RELATIVE_PATH _rel_dir ${CMAKE_CURRENT_SOURCE_DIR} ${_abs_dir})
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set(_possible_rel_dir)
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if(NOT protobuf_generate_grpc_APPEND_PATH)
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set(_possible_rel_dir ${_rel_dir}/)
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endif()
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set(_generated_srcs)
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foreach(_ext ${protobuf_generate_grpc_GENERATE_EXTENSIONS})
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list(APPEND _generated_srcs "${protobuf_generate_grpc_PROTOC_OUT_DIR}/${_possible_rel_dir}${_basename}${_ext}")
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endforeach()
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if(protobuf_generate_grpc_DESCRIPTORS AND protobuf_generate_grpc_LANGUAGE STREQUAL cpp)
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set(_descriptor_file "${CMAKE_CURRENT_BINARY_DIR}/${_basename}.desc")
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set(_dll_desc_out "--descriptor_set_out=${_descriptor_file}")
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list(APPEND _generated_srcs ${_descriptor_file})
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endif()
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list(APPEND _generated_srcs_all ${_generated_srcs})
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add_custom_command(
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OUTPUT ${_generated_srcs}
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COMMAND protobuf::protoc
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ARGS --${protobuf_generate_grpc_LANGUAGE}_out ${_dll_export_decl}${protobuf_generate_grpc_PROTOC_OUT_DIR}
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--grpc_out ${_dll_export_decl}${protobuf_generate_grpc_PROTOC_OUT_DIR}
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--plugin=protoc-gen-grpc=$<TARGET_FILE:${protobuf_generate_grpc_PLUGIN}>
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${_dll_desc_out} ${_protobuf_include_path} ${_abs_file}
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DEPENDS ${_abs_file} protobuf::protoc ${protobuf_generate_grpc_PLUGIN}
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COMMENT "Running ${protobuf_generate_grpc_LANGUAGE} protocol buffer compiler on ${_proto}"
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VERBATIM)
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endforeach()
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set_source_files_properties(${_generated_srcs_all} PROPERTIES GENERATED TRUE)
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if(protobuf_generate_grpc_OUT_VAR)
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set(${protobuf_generate_grpc_OUT_VAR} ${_generated_srcs_all} PARENT_SCOPE)
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endif()
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if(protobuf_generate_grpc_TARGET)
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target_sources(${protobuf_generate_grpc_TARGET} PRIVATE ${_generated_srcs_all})
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endif()
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endfunction()
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