wmlmove can now perform deletions from core.

data/tools/wmlmove

@@ -169,7 +169,7 @@ overwrite()
         print "# Image deletions:"
         for (name, defloc) in srcrefs.fileref.items():
                 for namespace in map(wmltools.directory_namespace, srclist):
-                    if wmltools.namespace_member(name, namespace):
+                    if wmltools.namespace_member(name, namespace) and cref.refcount(name) == 0:
                         if revert:
                             print wmltools.vcundelete(name)
                         else:

data/tools/wmltools.py

@@ -273,6 +273,12 @@ class CrossRef:
                     smallref.fileref[filename].references[referrer] = referlines
                     del self.fileref[filename].references[referrer]
         return smallref
+    def refcount(self, name):
+        "Return a reference count for the specified resource."
+        try:
+            return len(self.fileref[name].references.keys())
+        except KeyError:
+            return 0
 
 ## Namespace management
 #