# coding: utf-8
import django.dispatch

pre_revision = django.dispatch.Signal(providing_args=["instance"])

post_revision = django.dispatch.Signal(providing_args=["instance", "revision"])

pre_change_head = django.dispatch.Signal(
    providing_args=["instance", "current_head", "future_head"]
)

post_change_head = django.dispatch.Signal(providing_args=["instance", "current_head"])
