ignore launchpad connection errors

If we can't connect to the launchpad API, emit a warning but continue. 99%
of the time we don't need to check the launchpad name anyway, so failing
because LP is down is just frustrating and not useful to anyone.

Change-Id: I21b1b910894645ea1743c36bc1d92130cc92129e
Signed-off-by: Doug Hellmann <doug@doughellmann.com>

openstack_releases/cmds/validate.py

@@ -76,9 +76,15 @@ def validate_launchpad(deliverable_info, mk_warning, mk_error):
     except KeyError:
         mk_error('No launchpad project given')
     else:
-        lp_resp = requests.get('https://api.launchpad.net/1.0/' + lp_name)
-        if (lp_resp.status_code // 100) == 4:
-            mk_error('Launchpad project %s does not exist' % lp_name)
+        try:
+            lp_resp = requests.get('https://api.launchpad.net/1.0/' + lp_name)
+        except requests.exceptions.ConnectionError as e:
+            # The flakey Launchpad API failed. Don't punish the user for that.
+            mk_warning('Could not verify launchpad project %s (%s)' %
+                       (lp_name, e))
+        else:
+            if (lp_resp.status_code // 100) == 4:
+                mk_error('Launchpad project %s does not exist' % lp_name)
 
 
 def validate_team(deliverable_info, team_data, mk_warning, mk_error):

openstack_releases/tests/test_validate.py

@@ -37,7 +37,9 @@ class TestValidateLaunchpad(base.BaseTestCase):
         self.assertEqual(0, len(warnings))
         self.assertEqual(1, len(errors))
 
-    def test_invalid_launchpad_name(self):
+    @mock.patch('requests.get')
+    def test_invalid_launchpad_name(self, get):
+        get.return_value = mock.Mock(status_code=404)
         warnings = []
         errors = []
         validate.validate_launchpad(
@@ -48,7 +50,9 @@ class TestValidateLaunchpad(base.BaseTestCase):
         self.assertEqual(0, len(warnings))
         self.assertEqual(1, len(errors))
 
-    def test_valid_launchpad_name(self):
+    @mock.patch('requests.get')
+    def test_valid_launchpad_name(self, get):
+        get.return_value = mock.Mock(status_code=200)
         warnings = []
         errors = []
         validate.validate_launchpad(
@@ -59,6 +63,20 @@ class TestValidateLaunchpad(base.BaseTestCase):
         self.assertEqual(0, len(warnings))
         self.assertEqual(0, len(errors))
 
+    @mock.patch('requests.get')
+    def test_launchpad_timeout(self, get):
+        import requests
+        get.side_effect = requests.exceptions.ConnectionError('testing')
+        warnings = []
+        errors = []
+        validate.validate_launchpad(
+            {'launchpad': 'oslo.config'},
+            warnings.append,
+            errors.append,
+        )
+        self.assertEqual(1, len(warnings))
+        self.assertEqual(0, len(errors))
+
 
 class TestValidateTeam(base.BaseTestCase):