python/samba/gp_parse: PY2/PY3 compat changes for __init__.py

Fixes.

1) sorting of xml.etree.ElementTree.Element, in PY2 sort
   seems to sort lists of these. In PY3 this no longer works.
   Choosing tag as the sort key for py3 so at least in python3
   there is a consistent sort (probably won't match how it is
   sorted in PY2 but nothing seems to depend on that)
2) md5 requires bytes
3) tostring returns bytes in PY3, adjust code for that

Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>

python/samba/gp_parse/__init__.py

@@ -21,6 +21,7 @@ from xml.dom import minidom
 from io import BytesIO
 from xml.etree.ElementTree import ElementTree, fromstring, tostring
 from hashlib import md5
+from samba.compat import get_bytes
 
 
 ENTITY_USER_ID = 0
@@ -81,7 +82,7 @@ class GPParser(object):
         handle.write(minidom_parsed.toprettyxml(encoding=self.output_encoding))
 
     def new_xml_entity(self, name, ent_type):
-        identifier = md5(name).hexdigest()
+        identifier = md5(get_bytes(name)).hexdigest()
 
         type_str = entity_type_to_string(ent_type)
 
@@ -99,7 +100,7 @@ class GPParser(object):
 
         # Locate all user_id and all ACLs
         user_ids = root.findall('.//*[@user_id="TRUE"]')
-        user_ids.sort()
+        user_ids.sort(key = lambda x: x.tag)
 
         for elem in user_ids:
             old_text = elem.text
@@ -117,7 +118,7 @@ class GPParser(object):
                 global_entities.update([(old_text, elem.text)])
 
         acls = root.findall('.//*[@acl="TRUE"]')
-        acls.sort()
+        acls.sort(key = lambda x: x.tag)
 
         for elem in acls:
             old_text = elem.text
@@ -136,7 +137,7 @@ class GPParser(object):
                 global_entities.update([(old_text, elem.text)])
 
         share_paths = root.findall('.//*[@network_path="TRUE"]')
-        share_paths.sort()
+        share_paths.sort(key = lambda x: x.tag)
 
         for elem in share_paths:
             old_text = elem.text
@@ -171,7 +172,8 @@ class GPParser(object):
         output_xml = tostring(root)
 
         for ent in entities:
-            output_xml = output_xml.replace(ent[0].replace('&', '&'), ent[0])
+            entb = get_bytes(ent[0])
+            output_xml = output_xml.replace(entb.replace(b'&', b'&'), entb)
 
         with open(out_file, 'wb') as f:
             f.write(output_xml)