def run_post_update_script(component, previous_head):
 run_hook(component, None, component.post_update_script, env={'WL_PREVIOUS_HEAD': previous_head})

def run_post_update_script ( component , previous_head ) : run_hook ( component , None , component . post_update_script , env = { 'WL_PREVIOUS_HEAD' : previous_head } )
run post update hook .