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set(NANOPB_PLUGIN "${CMAKE_CURRENT_LIST_DIR}/nanopb/generator/protoc-gen-nanopb")
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function(nanopb_generate PROTO_FILE PB_OUT HDR_VAR SRC_VAR)
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get_filename_component(PROTO_FILE_NAME ${PROTO_FILE} NAME_WE)
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get_filename_component(PROTO_FILE_PATH ${PROTO_FILE} ABSOLUTE BASE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
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get_filename_component(PROTO_FILE_DIR ${PROTO_FILE_PATH} DIRECTORY)
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set(PROTO_HDR "${PB_OUT}/${PROTO_FILE_NAME}.pb.h")
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set(PROTO_SRC "${PB_OUT}/${PROTO_FILE_NAME}.pb.c")
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set(${HDR_VAR} ${${HDR_VAR}} ${PROTO_HDR} PARENT_SCOPE)
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set(${SRC_VAR} ${${SRC_VAR}} ${PROTO_SRC} PARENT_SCOPE)
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if(NOT CMAKE_SCRIPT_MODE_FILE)
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add_custom_command(OUTPUT ${PROTO_HDR} ${PROTO_SRC}
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COMMAND protoc
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--plugin=protoc-gen-nanopb=${NANOPB_PLUGIN}
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--nanopb_out=${PB_OUT}
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--proto_path ${PROTO_FILE_DIR}
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${PROTO_FILE_PATH}
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DEPENDS ${PROTO_FILE_PATH}
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COMMENT "Generating nanopb sources for ${PROTO_FILE}")
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set_property(SOURCE ${PROTO_HDR} ${PROTO_SRC} PROPERTY GENERATED TRUE)
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set_property(DIRECTORY . APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES ${PROTO_HDR} ${PROTO_SRC})
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endif()
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endfunction()
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