Add logging

Author: bmwiedemann

kiwi/system/identifier.py

@@ -15,13 +15,16 @@
 # You should have received a copy of the GNU General Public License
 # along with kiwi.  If not, see <http://www.gnu.org/licenses/>
 #
+import logging
 import os
 import random
 import struct
 
 # project
 from kiwi.storage.device_provider import DeviceProvider
 
+log = logging.getLogger('kiwi')
+
 
 class SystemIdentifier:
     """
@@ -35,6 +38,7 @@ def __init__(self):
         self.image_id = None
         sde = os.environ.get('SOURCE_DATE_EPOCH')
         if sde:
+            log.info('Using SOURCE_DATE_EPOCH as random seed.')
             random.seed(sde)
 
     def get_id(self) -> str: