Merge lp:~johnleach/duplicity/1315437-swift-container-create into lp:duplicity/0.6

[John Leach]

=== modified file 'duplicity/backends/swiftbackend.py'
--- duplicity/backends/swiftbackend.py	2014-04-29 23:49:01 +0000
+++ duplicity/backends/swiftbackend.py	2014-05-06 10:20:37 +0000
@@ -72,13 +72,25 @@
             
         self.container = parsed_url.path.lstrip('/')
 
+        container_metadata = None
         try:
             self.conn = Connection(**conn_kwargs)
-            self.conn.put_container(self.container)
-        except Exception as e:
-            log.FatalError("Connection failed: %s %s"
-                           % (e.__class__.__name__, util.uexc(e)),
-                           log.ErrorCode.connection_failed)
+            container_metadata = self.conn.head_container(self.container)
+        except ClientException:
+            pass
+        except Exception, e:
+                log.FatalError("Connection failed: %s %s"
+                               % (e.__class__.__name__, str(e)),
+                               log.ErrorCode.connection_failed)
+
+        if container_metadata is None:
+            log.Info("Creating container %s" % self.container)
+            try:
+                self.conn.put_container(self.container)
+            except Exception, e:
+                log.FatalError("Container creation failed: %s %s"
+                               % (e.__class__.__name__, str(e)),
+                               log.ErrorCode.connection_failed)
 
     def _error_code(self, operation, e):
         if isinstance(e, self.resp_exc):