# Check prereqs
FIND_PROGRAM(GCOV_PATH gcov)
FIND_PROGRAM(LCOV_PATH lcov)
FIND_PROGRAM(GENHTML_PATH genhtml)

IF(NOT GCOV_PATH)
    MESSAGE(FATAL_ERROR "gcov not found! Aborting...")
ENDIF(NOT GCOV_PATH)

IF(NOT CMAKE_BUILD_TYPE STREQUAL Debug)
    MESSAGE(WARNING "Code coverage results with an optimised (non-Debug) build may be misleading")
ENDIF(NOT CMAKE_BUILD_TYPE STREQUAL Debug)

#Setup compiler options
ADD_DEFINITIONS(-fprofile-arcs -ftest-coverage)
SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fprofile-arcs ")
SET(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -fprofile-arcs ")

IF((NOT LCOV_PATH) AND CMAKE_COMPILER_IS_GNUCXX)
    MESSAGE(FATAL_ERROR "lcov not found! Aborting...")
ENDIF((NOT LCOV_PATH) AND CMAKE_COMPILER_IS_GNUCXX)

IF(NOT GENHTML_PATH)
    MESSAGE(FATAL_ERROR "genhtml not found! Aborting...")
ENDIF(NOT GENHTML_PATH)

#Setup target
ADD_CUSTOM_TARGET(ShowCoverage
    #Capturing lcov counters and generating report
    COMMAND ${LCOV_PATH} --directory . --capture --output-file CodeCoverage.info
    COMMAND ${LCOV_PATH} --remove CodeCoverage.info '${CMAKE_CURRENT_BINARY_DIR}/*' 'test/*' 'mock/*' '/usr/*' '/opt/*' '*ext/rhel5_x86_64*' '*ext/osx*' --output-file CodeCoverage.info.cleaned
    COMMAND ${GENHTML_PATH} -o CodeCoverageReport CodeCoverage.info.cleaned
)

ADD_CUSTOM_TARGET(ResetCoverage
    #Cleanup lcov
    COMMAND ${LCOV_PATH} --directory . --zerocounters
)