find_package(PythonInterp 3.2 REQUIRED)

string(TOLOWER ${CMAKE_SYSTEM_NAME} SYSTEM_NAME)

if (NOT EXISTS "${PROJECT_SOURCE_DIR}/${SYSTEM_NAME}/.config")
    message(FATAL_ERROR "No vendor config for ${SYSTEM_NAME}: ${PROJECT_SOURCE_DIR}/${SYSTEM_NAME}/.config is missing")
endif()
# there is a .config in ${PROJECT_SOURCE_DIR}/${SYSTEM_NAME}/.config

function(config KEY KCONFIG)
execute_process(
    COMMAND ${PYTHON_EXECUTABLE} "${PROJECT_SOURCE_DIR}/tools/config.py" "--kconfig=${PROJECT_SOURCE_DIR}/${KCONFIG}" "--dotconfig=${PROJECT_SOURCE_DIR}/${SYSTEM_NAME}/.config" ${KEY}
    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR} OUTPUT_VARIABLE output OUTPUT_STRIP_TRAILING_WHITESPACE)
    set("CONFIG_${KEY}" ${output} PARENT_SCOPE)
endfunction()

config("POI_NAME"   "src/Kconfig")
config("POI_EXE"    "src/Kconfig")

config("INSTALL_BINDIR" "Kconfig")
config("INSTALL_LIBDIR" "Kconfig")
config("INSTALL_PLUGINDIR" "Kconfig")
config("INSTALL_APPDIR" "Kconfig")
config("INSTALL_ICONDIR" "Kconfig")

add_custom_command(OUTPUT "${PROJECT_BINARY_DIR}/include/config.h"
    COMMAND ${CMAKE_COMMAND} -E make_directory "${PROJECT_BINARY_DIR}/include"
    COMMAND ${CMAKE_COMMAND} -E env "srctree=${PROJECT_SOURCE_DIR}"
            ${PYTHON_EXECUTABLE} "${PROJECT_SOURCE_DIR}/tools/Kconfiglib/genconfig.py" "--header-path=${PROJECT_BINARY_DIR}/include/config.h" "${PROJECT_SOURCE_DIR}/src/Kconfig"
    WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}/${SYSTEM_NAME}")

add_custom_target(config_header DEPENDS "${PROJECT_BINARY_DIR}/include/config.h")

# QTBUG defines
execute_process(
    COMMAND ${PYTHON_EXECUTABLE} "${PROJECT_SOURCE_DIR}/tools/config.py" "--kconfig=${PROJECT_SOURCE_DIR}/src/Kconfig" "--dotconfig=${PROJECT_SOURCE_DIR}/${SYSTEM_NAME}/.config" "QTBUG"
    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR} OUTPUT_VARIABLE QTBUGS OUTPUT_STRIP_TRAILING_WHITESPACE)
foreach(bug IN LISTS QTBUGS)
    set(${bug} CACHE STRING "${bug} workaround")
endforeach()


## Version information, used in src/version.h.in
if (EXISTS "${PROJECT_SOURCE_DIR}/.git")
    execute_process(COMMAND git rev-list --count HEAD       WORKING_DIRECTORY ${PROJECT_SOURCE_DIR} OUTPUT_VARIABLE VerRevision OUTPUT_STRIP_TRAILING_WHITESPACE)
    execute_process(COMMAND git rev-parse --short HEAD      WORKING_DIRECTORY ${PROJECT_SOURCE_DIR} OUTPUT_VARIABLE VerShortId  OUTPUT_STRIP_TRAILING_WHITESPACE)
    execute_process(COMMAND git rev-parse HEAD              WORKING_DIRECTORY ${PROJECT_SOURCE_DIR} OUTPUT_VARIABLE VerCommit   OUTPUT_STRIP_TRAILING_WHITESPACE)
    execute_process(COMMAND git rev-parse --abbrev-ref HEAD WORKING_DIRECTORY ${PROJECT_SOURCE_DIR} OUTPUT_VARIABLE VerBranch   OUTPUT_STRIP_TRAILING_WHITESPACE)
endif()

set(poi_Version     "r${VerRevision}"               CACHE STRING "Short version string")
set(poi_Describe    "r${VerRevision}-${VerShortId}" CACHE STRING "Long version string")
set(poi_Build       "${VerBranch}-${VerCommit}"     CACHE STRING "Build string")