fix kafka: add missing rdkafka_mock.h header

[beryll1um]

Causes build to fail, with a typical error message about the missing header.

cmake_minimum_required(VERSION 3.14)
project(XXX LANGUAGES CXX)

set(USERVER_PROJECT_DIR "${CMAKE_CURRENT_SOURCE_DIR}/submodules/userver")
if(EXISTS ${USERVER_PROJECT_DIR})
	add_subdirectory(${USERVER_PROJECT_DIR})
else()
	message(FATAL_ERROR "Unable to locate userver in the submodules directory")
endif()

file(GLOB_RECURSE XXX_SRC_FILES "${CMAKE_CURRENT_SOURCE_DIR}/src/*.cpp")
add_executable(${PROJECT_NAME} ${XXX_SRC_FILES})
target_compile_features(${PROJECT_NAME} PUBLIC cxx_std_23)

userver_setup_environment()
target_link_libraries(${PROJECT_NAME} PUBLIC userver::core userver::kafka)

// src/main.cpp

#include <userver/components/minimal_server_component_list.hpp>
#include <userver/utils/daemon_run.hpp>

int main(int argc, char* argv[])
{
	auto components_list = userver::components::MinimalServerComponentList();
	return userver::utils::DaemonMain(argc, argv, components_list);
}

cmake -B build -DUSERVER_FEATURE_UTEST=OFF -DUSERVER_FEATURE_STACKTRACE=OFF -DUSERVER_FEATURE_KAFKA=ON
cmake --build build -- -j 16

submodules/userver/kafka/src/kafka/impl/holders.cpp:7:10: fatal error: librdkafka/rdkafka_mock.h: No such file or directory
    7 | #include <librdkafka/rdkafka_mock.h>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.

63de2c9 adds the include directive for this header, but the wrapper header rdkafka_mock.h itself was not provided.

[beryll1um]

From what I understand, it was unknown for so long because it only affects the CPM Kafka setup.

# userver/kafka/CMakeLists.txt

project(userver-kafka CXX)

if(USERVER_CONAN)
    find_package(RdKafka REQUIRED)
else()
    include(SetupRdKafka)
endif()

userver_module(
    kafka
    SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}"
    LINK_LIBRARIES_PRIVATE RdKafka::rdkafka
    DBTEST_DIRS "${CMAKE_CURRENT_SOURCE_DIR}/tests"
    DBTEST_LINK_LIBRARIES userver::kafka-utest
    DEPENDS core
)

target_compile_options(${PROJECT_NAME} PRIVATE "-Wno-ignored-qualifiers")

if(KAFKA_CPM)
    message(STATUS "Including from wrapper ${CMAKE_CURRENT_SOURCE_DIR}/wrapper/include") 
    target_include_directories(${PROJECT_NAME} PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/wrapper/include")
endif()

# ...

[apolukhin]

LGTM

[robot-magpie]

Many thanks for the PR! @apolukhin is now importing your pull request into our internal upstream repository.

[robot-magpie]

✅ This pull request is being closed because it has been successfully merged into our internal monorepository.
Your changes will be pushed to this repository soon. Thank you for your contribution!