Better debug logging for sourceppa problems.

policies/sourceppa.py

@@ -11,9 +11,11 @@ from policies.policy import BasePolicy, PolicyVerdict
 LAUNCHPAD_URL = 'https://api.launchpad.net/1.0/'
 PRIMARY = LAUNCHPAD_URL + 'ubuntu/+archive/primary'
 IGNORE = [
+    None,
     '',
-    'https://api.launchpad.net/1.0/ubuntu/+archive/primary',
-    'https://api.launchpad.net/1.0/debian/+archive/primary',
+    'IndexError',
+    LAUNCHPAD_URL + 'ubuntu/+archive/primary',
+    LAUNCHPAD_URL + 'debian/+archive/primary',
 ]
 
 
@@ -68,11 +70,12 @@ class SourcePPAPolicy(BasePolicy):
             'exact_match': 'true',
         })
         try:
-            return data['entries'][0]['copy_source_archive_link'] or ''
+            return data['entries'][0]['copy_source_archive_link']
         # IndexError means no packages in -proposed matched this name/version,
         # which is expected to happen when bileto runs britney.
         except IndexError:
-            return ''
+            self.log('SourcePPA getPackageUploads IndexError (%s %s)' % (pkg, version))
+            return 'IndexError'
 
     def initialise(self, britney):
         """Load cached source ppa data"""

tests/test_sourceppa.py

@@ -63,7 +63,7 @@ class T(unittest.TestCase):
         context.getcode.return_value = 200
         context.read.return_value = b'{"entries": []}'
         pol = SourcePPAPolicy(FakeOptions)
-        self.assertEqual(pol.lp_get_source_ppa('hello', '1.0'), '')
+        self.assertEqual(pol.lp_get_source_ppa('hello', '1.0'), 'IndexError')
 
     @patch('policies.sourceppa.urllib.request.urlopen')
     def test_lp_rest_api_no_source_ppa(self, urlopen):
@@ -72,7 +72,7 @@ class T(unittest.TestCase):
         context.getcode.return_value = 200
         context.read.return_value = b'{"entries": [{"copy_source_archive_link": null, "other_stuff": "ignored"}]}'
         pol = SourcePPAPolicy(FakeOptions)
-        self.assertEqual(pol.lp_get_source_ppa('hello', '1.0'), '')
+        self.assertEqual(pol.lp_get_source_ppa('hello', '1.0'), None)
 
     @patch('policies.sourceppa.urllib.request.urlopen')
     def test_lp_rest_api_with_source_ppa(self, urlopen):