# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1461330223 -7200
# Node ID 46af5559d721c833e7b8544e0417a040d01fd355
# Parent  6f9d4c2c206c9857c2ad3b4dfbee47bbd77e302d
Avoid making empty files or resources when encountering empty collections.

diff -r 6f9d4c2c206c -r 46af5559d721 tools/copy_store.py
--- a/tools/copy_store.py	Fri Apr 22 15:03:16 2016 +0200
+++ b/tools/copy_store.py	Fri Apr 22 15:03:43 2016 +0200
@@ -48,7 +48,9 @@
 
         # Copy requests.
 
-        to_store.set_requests(user, from_store.get_requests(user))
+        requests = from_store.get_requests(user)
+        if requests:
+            to_store.set_requests(user, requests)
 
         # Copy events, both active and cancellations.
 
@@ -79,16 +81,22 @@
 
         # Copy free/busy information for the user.
 
-        to_store.set_freebusy(user, from_store.get_freebusy(user))
+        freebusy = from_store.get_freebusy(user)
+        if freebusy:
+            to_store.set_freebusy(user, freebusy)
 
         # Copy free/busy information for other users.
 
         for other in from_store.get_freebusy_others(user):
-            to_store.set_freebusy_for_other(user, from_store.get_freebusy_for_other(user, other), other)
+            freebusy = from_store.get_freebusy_for_other(user, other)
+            if freebusy:
+                to_store.set_freebusy_for_other(user, freebusy, other)
 
         # Copy free/busy offers.
 
-        to_store.set_freebusy_offers(user, from_store.get_freebusy_offers(user))
+        offers = from_store.get_freebusy_offers(user)
+        if offers:
+            to_store.set_freebusy_offers(user, offers)
 
     # For each quota group...