From d38bea6752afd804715167164296737d565a7d20 Mon Sep 17 00:00:00 2001
From: "W. Trevor King" <wking@drexel.edu>
Date: Thu, 16 Feb 2012 07:50:22 -0500
Subject: [PATCH] Raise errors in Project if the configured backend could not
 be loaded.

---
 update_copyright/project.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/update_copyright/project.py b/update_copyright/project.py
index e9de6cc..18280b1 100644
--- a/update_copyright/project.py
+++ b/update_copyright/project.py
@@ -103,8 +103,12 @@ class Project (object):
             if vcs == 'Git':
                 self._vcs = _GitBackend()
             elif vcs == 'Bazaar':
+                if _BazaarBackend is None:
+                    raise _bazaar_import_error
                 self._vcs = _BazaarBackend()
             elif vcs == 'Mercurial':
+                if _MercurialBackend is None:
+                    raise _mercurial_import_error
                 self._vcs = _MercurialBackend()
             else:
                 raise NotImplementedError('vcs: {}'.format(vcs))
-- 
2.26.2