CMake and Git to run clang-tidy easily

clang-tidy.cmake

# Get the C++ files tracked by Git
find_program(GIT "git" REQUIRED)

execute_process(
        COMMAND ${GIT} ls-file "*.cpp" "*.hpp" ":!*magic_enum*"
        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
        OUTPUT_VARIABLE GIT_TRACKED_CPP_FILES
        OUTPUT_STRIP_TRAILING_WHITESPACE
        COMMAND_ERROR_IS_FATAL ANY
)

# Convert the output to a list (split by newlines)
string(REPLACE "\n" ";" GIT_TRACKED_CPP_FILES ${GIT_TRACKED_CPP_FILES})

# Add a target to run clang-tidy on this list
find_program(CLANG_TIDY "clang-tidy" REQUIRED)

add_custom_target(clang-tidy
        COMMAND ${CLANG_TIDY} -p ${CMAKE_CURRENT_BINARY_DIR} ${GIT_TRACKED_CPP_FILES}
        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
        COMMENT "Running clang-tidy..."
)