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cmake_minimum_required(VERSION 3.0)
project(fluent-opentelemetry-proto C)
# Include helpers
include(cmake/macros.cmake)
# We only regenerate files if it has been enabled
option(FLUENT_PROTO_REGENERATE "Regenerate .[ch] files only" "No")
# build options for files generation
option(FLUENT_PROTO_COMMON "Include common.proto" "Yes")
option(FLUENT_PROTO_RESOURCE "Include resource.proto" "Yes")
option(FLUENT_PROTO_TRACE "Include trace.proto" "Yes")
option(FLUENT_PROTO_LOGS "Include logs.proto" "Yes")
option(FLUENT_PROTO_METRICS "Inlcude metrics.proto" "No")
option(FLUENT_PROTO_EXAMPLES "Add example programs" "Yes")
if(FLUENT_PROTO_REGENERATE AND (NOT PROTOBUF_C_SOURCE_DIR OR NOT OTEL_PROTO_DIR))
if (NOT PROTOBUF_C_SOURCE_DIR)
message(FATAL_ERROR
"\n"
"The variable PROTOBUF_C_SOURCE_DIR has not been defined. "
"You have to specify which directory contains the source code "
"of the repository https://github.com/fluent/protobuf-c\n"
"Define the path with: -DPROTOBUF_C_SOURCE_DIR=/path/to/protobuf-c")
endif()
if (NOT OTEL_PROTO_DIR)
message(FATAL_ERROR
"\n"
"The variable OTEL_PROTO_DIR has not been defined. "
"You have to specify which directory contains the source code "
"of the repository https://github.com/open-telemetry/opentelemetry-proto\n"
"Define the path with: -DOTEL_PROTO_DIR=/path/to/opentelemetry-proto")
endif()
else()
if (FLUENT_PROTO_REGENERATE)
message(STATUS "protobuf-c directory: ${PROTOBUF_C_SOURCE_DIR}")
endif()
endif()
# Paths
set(PROTOC_BIN "/opt/protobuf-c/bin/protoc-c")
set(PROTOC_ARG_OUT "--c_out=${PROJECT_SOURCE_DIR}/proto_c/")
set(PROTOC_ARG_PATH "--proto_path=${OTEL_PROTO_DIR}/")
if (FLUENT_PROTO_REGENERATE)
# final protoc base command
message(STATUS "base command: ${PROTOC_BIN} ${PROTOC_ARG_OUT} ${PROTOC_ARG_PATH}")
# Protobuf-c headers (this is not working, I ended up copying protobuf-c headers inside include/)
set(PROTOC_HEADERS "/opt/protobuf-c/include/")
include_directories(PROTOC_HEADERS)
if (FLUENT_PROTO_COMMON)
message(STATUS "processing common.proto")
set(proto_file ${OTEL_PROTO_DIR}/opentelemetry/proto/common/v1/common.proto)
execute_process(COMMAND ${PROTOC_BIN} ${PROTOC_ARG_OUT} ${PROTOC_ARG_PATH} ${proto_file})
include_directories(${PROJECT_BINARY_DIR}/opentelemetry/proto/common/v1/)
FLUENT_OTEL_DEFINITION(FLUENT_OTEL_HAVE_COMMON)
endif()
if (FLUENT_PROTO_RESOURCE)
message(STATUS "processing resource.proto")
set(proto_file "${OTEL_PROTO_DIR}/opentelemetry/proto/resource/v1/resource.proto")
execute_process(COMMAND ${PROTOC_BIN} ${PROTOC_ARG_OUT} ${PROTOC_ARG_PATH} ${proto_file})
include_directories(${PROJECT_BINARY_DIR}/opentelemetry/proto/resource/v1/)
FLUENT_OTEL_DEFINITION(FLUENT_OTEL_HAVE_RESOURCE)
endif()
if (FLUENT_PROTO_TRACE)
message(STATUS "processing trace.proto")
set(proto_file "${OTEL_PROTO_DIR}/opentelemetry/proto/trace/v1/trace.proto")
execute_process(COMMAND ${PROTOC_BIN} ${PROTOC_ARG_OUT} ${PROTOC_ARG_PATH} ${proto_file})
include_directories(${PROJECT_BINARY_DIR}/opentelemetry/proto/trace/v1/)
message(STATUS "processing trace_service.proto")
set(proto_file "${OTEL_PROTO_DIR}/opentelemetry/proto/collector/trace/v1/trace_service.proto")
execute_process(COMMAND ${PROTOC_BIN} ${PROTOC_ARG_OUT} ${PROTOC_ARG_PATH} ${proto_file})
include_directories(${PROJECT_BINARY_DIR}/opentelemetry/proto/collector/trace/v1)
FLUENT_OTEL_DEFINITION(FLUENT_OTEL_HAVE_TRACE)
endif()
if (FLUENT_PROTO_LOGS)
message(STATUS "processing logs.proto")
set(proto_file "${OTEL_PROTO_DIR}/opentelemetry/proto/logs/v1/logs.proto")
execute_process(COMMAND ${PROTOC_BIN} ${PROTOC_ARG_OUT} ${PROTOC_ARG_PATH} ${proto_file})
include_directories(${PROJECT_BINARY_DIR}/opentelemetry/proto/logs/v1/)
FLUENT_OTEL_DEFINITION(FLUENT_OTEL_HAVE_LOGS)
message(STATUS "processing logs_service.proto")
set(proto_file "${OTEL_PROTO_DIR}/opentelemetry/proto/collector/logs/v1/logs_service.proto")
execute_process(COMMAND ${PROTOC_BIN} ${PROTOC_ARG_OUT} ${PROTOC_ARG_PATH} ${proto_file})
include_directories(${PROJECT_BINARY_DIR}/opentelemetry/proto/collector/logs/v1/)
FLUENT_OTEL_DEFINITION(FLUENT_OTEL_HAVE_LOGS)
endif()
if (FLUENT_PROTO_METRICS)
message(STATUS "processing metrics.proto")
set(proto_file "${OTEL_PROTO_DIR}/opentelemetry/proto/metrics/v1/metrics.proto")
execute_process(COMMAND ${PROTOC_BIN} ${PROTOC_ARG_OUT} ${PROTOC_ARG_PATH} ${proto_file})
include_directories(${PROJECT_BINARY_DIR}/opentelemetry/proto/metrics/v1/)
message(STATUS "processing metrics_service.proto")
set(proto_file "${OTEL_PROTO_DIR}/opentelemetry/proto/collector/metrics/v1/metrics_service.proto")
execute_process(COMMAND ${PROTOC_BIN} ${PROTOC_ARG_OUT} ${PROTOC_ARG_PATH} ${proto_file})
include_directories(${PROJECT_BINARY_DIR}/opentelemetry/proto/collector/logs/v1/)
FLUENT_OTEL_DEFINITION(FLUENT_OTEL_HAVE_METRICS)
endif()
configure_file(
"${PROJECT_SOURCE_DIR}/include/fluent-otel-proto/fluent-otel-info.h.in"
"${PROJECT_SOURCE_DIR}/include/fluent-otel-proto/fluent-otel-info.h"
)
# protobuf-c dependency
configure_file(
"${PROTOBUF_C_SOURCE_DIR}/protobuf-c/protobuf-c.c"
"${PROJECT_SOURCE_DIR}/proto_c/protobuf-c/protobuf-c.c" COPYONLY)
configure_file(
"${PROTOBUF_C_SOURCE_DIR}/protobuf-c/protobuf-c.h"
"${PROJECT_SOURCE_DIR}/proto_c/protobuf-c/protobuf-c.h" COPYONLY)
endif()
# build library
add_subdirectory(src)
# build example
if (FLUENT_PROTO_EXAMPLES)
add_subdirectory(examples)
endif()
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