:param repoDir: directory where IP-Core should be stored
        :param vendor: vendor name of IP-Core
        :param library: library name of IP-Core
        :param description: description of IP-Core

        :summary:  synthetise hdl if needed
            copy hdl files
            create gui file
            create component.xml, component_hw.tcl

def createPackage(self, repoDir, vendor: str="hwt", library: str="mylib",
                      description: Optional[str]=None):
        '''
        :param repoDir: directory where IP-Core should be stored
        :param vendor: vendor name of IP-Core
        :param library: library name of IP-Core
        :param description: description of IP-Core

        :summary:  synthetise hdl if needed
            copy hdl files
            create gui file
            create component.xml, component_hw.tcl
        '''
        ip_dir = os.path.join(repoDir, self.name + "/")
        if os.path.exists(ip_dir):
            shutil.rmtree(ip_dir)

        ip_srcPath = os.path.join(ip_dir, "src")
        tclPath = os.path.join(ip_dir, "xgui")
        guiFile = os.path.join(tclPath, "gui.tcl")
        for d in [ip_dir, ip_srcPath, tclPath]:
            os.makedirs(d)
        self.saveHdlFiles(ip_srcPath)

        self.guiFile = guiFile
        self.mkAutoGui()

        c = Component(self)
        c._files = [relpath(p, ip_dir) for p in sorted(self.hdlFiles)] + \
                   [relpath(guiFile, ip_dir)]

        c.vendor = vendor
        c.library = library
        if description is None:
            c.description = self.name + "_v" + c.version
        else:
            c.description = description

        c.asignTopUnit(self.top, self.name)

        xml_str = prettify(c.ip_xact())
        with open(ip_dir + "component.xml", "w") as f:
            f.write(xml_str)

        quartus_tcl_str = c.quartus_tcl()
        with open(ip_dir + "component_hw.tcl", "w") as f:
            f.write(quartus_tcl_str)