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# Copyright The OpenTelemetry Authors
# SPDX-License-Identifier: Apache-2.0
find_package(OpenTracing CONFIG QUIET)
set(OpenTracing_PROVIDER "find_package")
if(NOT OpenTracing_FOUND)
set(_OPENTRACING_SUBMODULE_DIR "${opentelemetry-cpp_SOURCE_DIR}/third_party/opentracing-cpp")
if(EXISTS "${_OPENTRACING_SUBMODULE_DIR}/.git")
FetchContent_Declare(
"opentracing"
SOURCE_DIR "${_OPENTRACING_SUBMODULE_DIR}"
)
set(OpenTracing_PROVIDER "fetch_source")
else()
FetchContent_Declare(
"opentracing"
GIT_REPOSITORY "https://github.com/opentracing/opentracing-cpp.git"
GIT_TAG "${opentracing-cpp_GIT_TAG}"
)
set(OpenTracing_PROVIDER "fetch_repository")
endif()
# OpenTracing uses the BUILD_TESTING variable directly and we must force the cached value to OFF.
# save the current state of BUILD_TESTING
if(DEFINED BUILD_TESTING)
set(_SAVED_BUILD_TESTING ${BUILD_TESTING})
endif()
if(DEFINED CMAKE_POLICY_VERSION_MINIMUM)
set(_SAVED_CMAKE_POLICY_VERSION_MINIMUM ${CMAKE_POLICY_VERSION_MINIMUM})
endif()
# Set the cache variables for the opentracing build
set(BUILD_TESTING OFF CACHE BOOL "" FORCE)
set(BUILD_MOCKTRACER OFF CACHE BOOL "" FORCE)
set(CMAKE_POLICY_VERSION_MINIMUM "3.5" CACHE STRING "" FORCE)
FetchContent_MakeAvailable(opentracing)
# Restore the saved state of BUILD_TESTING
if(DEFINED _SAVED_BUILD_TESTING)
set(BUILD_TESTING ${_SAVED_BUILD_TESTING} CACHE BOOL "" FORCE)
else()
unset(BUILD_TESTING CACHE)
endif()
# Restore the saved state of CMAKE_POLICY_VERSION_MINIMUM
if(DEFINED _SAVED_CMAKE_POLICY_VERSION_MINIMUM)
set(CMAKE_POLICY_VERSION_MINIMUM ${_SAVED_CMAKE_POLICY_VERSION_MINIMUM} CACHE STRING "" FORCE)
else()
unset(CMAKE_POLICY_VERSION_MINIMUM CACHE)
endif()
# Patch the opentracing targets to set missing includes, add namespaced alias targets, disable iwyu and clang-tidy.
foreach(_target opentracing opentracing-static)
if(TARGET ${_target})
# Add missing include directories
target_include_directories(${_target} PUBLIC
"$<BUILD_INTERFACE:${opentracing_SOURCE_DIR}/include>"
"$<BUILD_INTERFACE:${opentracing_SOURCE_DIR}/3rd_party/include>"
"$<BUILD_INTERFACE:${opentracing_BINARY_DIR}/include>"
)
# Disable CXX_INCLUDE_WHAT_YOU_USE and CXX_CLANG_TIDY
set_target_properties(${_target}
PROPERTIES CXX_INCLUDE_WHAT_YOU_USE "" CXX_CLANG_TIDY "")
# Create alias targets
if(NOT TARGET OpenTracing::${_target})
add_library(OpenTracing::${_target} ALIAS ${_target})
endif()
endif()
endforeach()
# Set the OpenTracing_VERSION variable from the git tag.
string(REGEX REPLACE "^v([0-9]+\\.[0-9]+\\.[0-9]+)$" "\\1" OpenTracing_VERSION "${opentracing-cpp_GIT_TAG}")
endif(NOT OpenTracing_FOUND)
if(NOT TARGET OpenTracing::opentracing AND NOT TARGET OpenTracing::opentracing-static)
message(FATAL_ERROR "No OpenTracing targets (OpenTracing::opentracing or OpenTracing::opentracing-static) were imported")
endif()
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