function(cleanup_install_dir)
    if(NOT $ENV{USERNAME} STREQUAL "sthalik")
        message(WARNING "you can't run this potentially destructive function")
        message(FATAL_ERROR "if you're sure, remove this line")
    endif()

    file(GLOB_RECURSE files LIST_DIRECTORIES TRUE RELATIVE "${CMAKE_BINARY_DIR}" "*")

    set(files_ "")

    set(got-install FALSE)
    set(got-install-file FALSE)
    set(got-cache FALSE)

    foreach(i ${files})
        if (i STREQUAL "install")
            set(got-install TRUE)
            continue()
        endif()

        string(FIND "${i}" "install/" pos)

        if(pos GREATER -1)
            set(got-install-file TRUE)
            continue()
        endif()

        if(i STREQUAL "CMakeCache.txt")
            set(got-cache TRUE)
            continue()
        endif()

        list(APPEND files_ "${CMAKE_BINARY_DIR}/${i}")
    endforeach()

    unset(files)

    if(NOT got-cache OR NOT got-install OR NOT got-install-file)
        message(FATAL_ERROR "")
    endif()

    # let's hope nothing bad happens
    file(REMOVE_RECURSE ${files_})

    execute_process(COMMAND cmake . WORKING_DIRECTORY "${CMAKE_BINARY_DIR}" OUTPUT_QUIET)
endfunction()

cleanup_install_dir()