# Find Lcov tools
find_program(LCOV lcov DOC "LCov")
find_program(LCOV_GENHTML genhtml DOC "LCov GenHtml" HINTS ${LCOV}/..)

if( NOT LCOV OR NOT LCOV_GENHTML )
    message(SEND_ERROR "LCov tools not found")
endif()


# Files and folders
set(COV_DIR "${CMAKE_BINARY_DIR}/coverage")
set(COV_FILE "${COV_DIR}/${PROJECT_NAME}.info")

if( NOT EXISTS ${COV_DIR} )
    file(MAKE_DIRECTORY ${COV_DIR})
endif()


# Compiler flags
set(flag --coverage)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}")


set(INPUT_DIR "${CMAKE_SOURCE_DIR}")

# Make targets
add_custom_target(coverage-clean ${CMAKE_COMMAND} -E make_directory ${COV_DIR}
                                COMMAND ${LCOV}
                                --directory ${INPUT_DIR}
                                --zerocounters

                                WORKING_DIRECTORY ${COV_DIR}
                                COMMENT "Zerocounter coverage data"
                                VERBATIM
                                )

add_custom_target(coverage ${CMAKE_COMMAND} -E make_directory ${COV_DIR}
                                COMMAND ${LCOV}
                                --capture
                                --directory ${INPUT_DIR}
                                --output-file ${COV_FILE}
                                --no-external

                                COMMAND ${LCOV}
                                --remove ${COV_FILE} "*/test/*"
                                --remove ${COV_FILE} "*/generated/*"
                                --output-file ${COV_FILE}

                                COMMAND ${LCOV_GENHTML} --legend ${COV_FILE}

                                WORKING_DIRECTORY ${COV_DIR}
                                COMMENT "Generate coverage data"
                                VERBATIM
                                )