# Build Qt automatically


set(QT_SOURCES_DIR "${CMAKE_CURRENT_LIST_DIR}/sources" CACHE PATH "Qt5 sources path")

set(QT_DEST_DIR "${CMAKE_CURRENT_BINARY_DIR}/qt-sdk")

if (WIN32 AND NOT ANDROID)
  set(QT_BUILD_SCRIPT "${CMAKE_CURRENT_LIST_DIR}/build_qt_windows.bat.in")
elseif (IOS)
  set(QT_BUILD_SCRIPT "${CMAKE_CURRENT_LIST_DIR}/build_qt_ios.sh.in")
elseif (APPLE)
  set(QT_BUILD_SCRIPT "${CMAKE_CURRENT_LIST_DIR}/build_qt_osx.sh.in")
elseif (LINUX32)
  set(QT_BUILD_SCRIPT "${CMAKE_CURRENT_LIST_DIR}/build_qt_linux32.sh.in")
elseif (LINUX64)
  set(QT_BUILD_SCRIPT "${CMAKE_CURRENT_LIST_DIR}/build_qt_linux.sh.in")
elseif (RPI)
  set(QT_BUILD_SCRIPT "${CMAKE_CURRENT_LIST_DIR}/build_qt_rpi.sh.in")
else ()
  message(SEND_ERROR "No script to build Qt for this platform: ${CMAKE_SYSTEM_NAME}")
endif()

if (WIN32)
  configure_file(${QT_BUILD_SCRIPT} "${CMAKE_CURRENT_BINARY_DIR}/build_qt.bat" @ONLY)
else (WIN32)
  configure_file(${QT_BUILD_SCRIPT} "${CMAKE_CURRENT_BINARY_DIR}/build_qt.sh" @ONLY)
endif (WIN32)

if (NOT EXISTS ${CMAKE_CURRENT_BINARY_DIR}/qt_dummy.cpp)
  file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/qt_dummy.cpp "int x = 0;")
endif()

add_library(qtDummy STATIC ${CMAKE_CURRENT_BINARY_DIR}/qt_dummy.cpp)

message(STATUS "Building Qt")

if (WIN32)
  add_custom_command(
    TARGET qtDummy
    POST_BUILD
    COMMAND build_qt.bat
    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
  )
else (WIN32)
  add_custom_command(
    TARGET qtDummy
    POST_BUILD
    COMMAND ./build_qt.sh
    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
  )
endif (WIN32)

install(
  DIRECTORY ${QT_DEST_DIR}/
  DESTINATION qt
  USE_SOURCE_PERMISSIONS
)