Merge lp:~broder/ubuntu-archive-tools/backport-without-changes-file into lp:ubuntu-archive-tools

[Evan Broder]

=== modified file 'backport.py'
--- backport.py	2010-11-24 10:56:32 +0000
+++ backport.py	2011-11-15 21:37:34 +0000
@@ -48,21 +48,15 @@
             apt_pkg.version_compare(latest[suite], version) >= 0):
             continue
         latest[suite] = version
-        # sp.files not exposed via the API yet; see
-        # https://bugs.launchpad.net/bugs/394827
-        changes_handle = urllib2.urlopen(sp.changesFileUrl())
-        try:
-            changes = deb822.Changes(changes_handle.read())
-        finally:
-            changes_handle.close()
-        for sp_file in changes['files']:
-            if sp_file['name'].endswith('.dsc'):
+        for sp_file in sp.sourceFileUrls():
+            sp_file = os.path.basename(sp_file)
+            if sp_file.endswith('.dsc'):
                 if name.startswith('lib') and len(name) > 3:
                     name_hash = name[:4]
                 else:
                     name_hash = name[0]
                 dirname = 'pool/%s/%s/%s' % (sp.component_name, name_hash, name)
-                pkgs[suite] = (sp, '%s/%s' % (dirname, sp_file['name']))
+                pkgs[suite] = (sp, '%s/%s' % (dirname, sp_file))
                 break
 
     if latest['to'] is not None: