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# Copyright The OpenTelemetry Authors
# SPDX-License-Identifier: Apache-2.0
# Proto file
get_filename_component(proto_file "./protos/messages.proto" ABSOLUTE)
get_filename_component(proto_file_path "${proto_file}" PATH)
message(STATUS "PATH:${proto_file_path}:${proto_file}")
# Generated sources
set(example_proto_srcs "${CMAKE_CURRENT_BINARY_DIR}/messages.pb.cc")
set(example_proto_hdrs "${CMAKE_CURRENT_BINARY_DIR}/messages.pb.h")
set(example_grpc_srcs "${CMAKE_CURRENT_BINARY_DIR}/messages.grpc.pb.cc")
set(example_grpc_hdrs "${CMAKE_CURRENT_BINARY_DIR}/messages.grpc.pb.h")
if(NOT TARGET gRPC::grpc_cpp_plugin)
message(
FATAL_ERROR
"gRPC::grpc_cpp_plugin target not found. Please ensure that gRPC is installed and found with find_package."
)
endif()
if(NOT DEFINED PROTOBUF_PROTOC_EXECUTABLE)
if(NOT TARGET protobuf::protoc)
message(
FATAL_ERROR
"protobuf::protoc target not found. Please ensure that Protobuf is installed and found with find_package."
)
endif()
set(PROTOBUF_PROTOC_EXECUTABLE protobuf::protoc)
endif()
add_custom_command(
OUTPUT "${example_proto_srcs}" "${example_proto_hdrs}" "${example_grpc_srcs}"
"${example_grpc_hdrs}"
COMMAND
${PROTOBUF_PROTOC_EXECUTABLE} ARGS "--grpc_out=${CMAKE_CURRENT_BINARY_DIR}"
"--cpp_out=${CMAKE_CURRENT_BINARY_DIR}" "--proto_path=${proto_file_path}"
"--plugin=protoc-gen-grpc=$<TARGET_FILE:gRPC::grpc_cpp_plugin>"
"${proto_file}")
add_library(example_grpc_proto ${example_grpc_srcs} ${example_grpc_hdrs}
${example_proto_srcs} ${example_proto_hdrs})
# Disable include-what-you-use and clang-tidy on generated code.
set_target_properties(example_grpc_proto PROPERTIES CXX_INCLUDE_WHAT_YOU_USE ""
CXX_CLANG_TIDY "")
target_include_directories(
example_grpc_proto PUBLIC "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>")
if(TARGET protobuf::libprotobuf)
target_link_libraries(example_grpc_proto PUBLIC gRPC::grpc++
protobuf::libprotobuf)
else()
target_include_directories(example_grpc_proto PUBLIC ${Protobuf_INCLUDE_DIRS})
target_link_libraries(example_grpc_proto PUBLIC gRPC::grpc++
${Protobuf_LIBRARIES})
endif()
foreach(_target client server)
add_executable(${_target} "${_target}.cc")
target_link_libraries(
${_target} PRIVATE example_grpc_proto
opentelemetry-cpp::ostream_span_exporter)
endforeach()
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