debian_xen/debian.py: Allow ~pre versions

Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>

diff --git a/debian/lib/python/debian_xen/debian.py b/debian/lib/python/debian_xen/debian.py
index 4b7037bc6568a7aef6629046826f8d14e00cab89..f541494e9a73f70f88abb4cc2f3579d647b99b5c 100644 (file)
--- a/debian/lib/python/debian_xen/debian.py
+++ b/debian/lib/python/debian_xen/debian.py
@@ -16,6 +16,9 @@ class VersionXen(Version):
     (?:
         \+hg-\d+.[a-z0-9]+
     )?
+    (?:
+        ~pre\.\d{4,}\.\d{2}\.\d{2}(?:\b[-+0-9a-z])?
+    )?
     |
     ~hg-\d+.[a-z0-9]+
 )