rauc_dbus_ddi_client: add support for step_callback

This function will be called with RAUC progress update information

Signed-off-by: Enrico Joerns <ejo@pengutronix.de>

rauc_hawkbit/rauc_dbus_ddi_client.py

@@ -25,7 +25,7 @@ class RaucDBUSDDIClient(AsyncDBUSClient):
     interface.
     """
     def __init__(self, session, host, ssl, tenant_id, target_name, auth_token,
-                 attributes, bundle_dl_location, result_callback, lock_keeper=None):
+                 attributes, bundle_dl_location, result_callback, step_callback=None, lock_keeper=None):
         super(RaucDBUSDDIClient, self).__init__()
 
         self.attributes = attributes
@@ -41,6 +41,7 @@ def __init__(self, session, host, ssl, tenant_id, target_name, auth_token,
         self.bundle_dl_location = bundle_dl_location
         self.lock_keeper = lock_keeper
         self.result_callback = result_callback
+        self.step_callback = step_callback
 
         # DBUS proxy
         self.rauc = self.new_proxy('de.pengutronix.rauc.Installer', '/')
@@ -96,6 +97,9 @@ async def progress_callback(self, connection, sender_name,
         self.logger.info('Update progress: {}% {}'.format(percentage,
                                                           description))
 
+        if self.step_callback:
+            self.step_callback(percentage, description)
+
         # send feedback to HawkBit
         status_execution = DeploymentStatusExecution.proceeding
         status_result = DeploymentStatusResult.none