Add support for sonar?

[KantarBruceAdams]

I manually modified CodeCoverage.cmake to include:

`function(setup_target_for_coverage_gcovr_sonar)

set(options NONE)
set(oneValueArgs BASE_DIRECTORY NAME)
set(multiValueArgs EXCLUDE EXECUTABLE EXECUTABLE_ARGS DEPENDENCIES)
cmake_parse_arguments(Coverage "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})

if(NOT GCOVR_PATH)
    message(FATAL_ERROR "gcovr not found! Aborting...")
endif() # NOT GCOVR_PATH

# Set base directory (as absolute path), or default to PROJECT_SOURCE_DIR
if(DEFINED Coverage_BASE_DIRECTORY)
    get_filename_component(BASEDIR ${Coverage_BASE_DIRECTORY} ABSOLUTE)
else()
    set(BASEDIR ${PROJECT_SOURCE_DIR})
endif()

# Collect excludes (CMake 3.4+: Also compute absolute paths)
set(GCOVR_EXCLUDES "")
foreach(EXCLUDE ${Coverage_EXCLUDE} ${COVERAGE_EXCLUDES} ${COVERAGE_GCOVR_EXCLUDES})
    if(CMAKE_VERSION VERSION_GREATER 3.4)
        get_filename_component(EXCLUDE ${EXCLUDE} ABSOLUTE BASE_DIR ${BASEDIR})
    endif()
    list(APPEND GCOVR_EXCLUDES "${EXCLUDE}")
endforeach()
list(REMOVE_DUPLICATES GCOVR_EXCLUDES)

# Combine excludes to several -e arguments
set(GCOVR_EXCLUDE_ARGS "")
foreach(EXCLUDE ${GCOVR_EXCLUDES})
    list(APPEND GCOVR_EXCLUDE_ARGS "-e")
    list(APPEND GCOVR_EXCLUDE_ARGS "${EXCLUDE}")
endforeach()

# Set up commands which will be run to generate coverage data
# Run tests
set(GCOVR_XML_EXEC_TESTS_CMD
    ${Coverage_EXECUTABLE} ${Coverage_EXECUTABLE_ARGS}
)
# Running gcovr
set(GCOVR_XML_CMD
    ${GCOVR_PATH} -r ${BASEDIR} ${GCOVR_ADDITIONAL_ARGS} ${GCOVR_EXCLUDE_ARGS} 
    --object-directory=${PROJECT_BINARY_DIR} --sonar ${Coverage_NAME}.xml
)

if(CODE_COVERAGE_VERBOSE)
    message(STATUS "Executed command report")

    message(STATUS "Command to run tests: ")
    string(REPLACE ";" " " GCOVR_XML_EXEC_TESTS_CMD_SPACED "${GCOVR_XML_EXEC_TESTS_CMD}")
    message(STATUS "${GCOVR_XML_EXEC_TESTS_CMD_SPACED}")

    message(STATUS "Command to generate gcovr XML coverage data: ")
    string(REPLACE ";" " " GCOVR_XML_CMD_SPACED "${GCOVR_XML_CMD}")
    message(STATUS "${GCOVR_XML_CMD_SPACED}")
endif()

add_custom_target(${Coverage_NAME}
    COMMAND ${GCOVR_XML_EXEC_TESTS_CMD}
    COMMAND ${GCOVR_XML_CMD}
    
    BYPRODUCTS ${Coverage_NAME}.xml
    WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
    DEPENDS ${Coverage_DEPENDENCIES}
    VERBATIM # Protect arguments to commands
    COMMENT "Running gcovr to produce Sonar code coverage report."
)

# Show info where to find the report
add_custom_command(TARGET ${Coverage_NAME} POST_BUILD
    COMMAND ;
    COMMENT "Sonar code coverage report saved in ${Coverage_NAME}.xml."
)

endfunction() # setup_target_for_coverage_sonar_xml
`