feat: self-update of master and agents (#15) (#32)

internal/master/store/drift_merge_integration_test.go

@@ -418,11 +418,11 @@ func TestMergeService_Refusals(t *testing.T) {
 		{"the updater itself (new)", func(t *testing.T, s *Store, f moveFixture) error {
 			mustExec(t, s, `UPDATE services SET self = true WHERE id = $1`, f.to)
 			return s.MergeService(context.Background(), f.from, f.to)
-		}, refused(model.ReasonSelf)},
+		}, refused(model.ReasonMergeSelf)},
 		{"the updater itself (old)", func(t *testing.T, s *Store, f moveFixture) error {
 			mustExec(t, s, `UPDATE services SET self = true WHERE id = $1`, f.from)
 			return s.MergeService(context.Background(), f.from, f.to)
-		}, refused(model.ReasonSelf)},
+		}, refused(model.ReasonMergeSelf)},
 		{"active job on the old service", func(t *testing.T, s *Store, f moveFixture) error {
 			_, err := s.CreateJob(context.Background(), newJob(f.from, f.a))
 			require.NoError(t, err)

internal/master/store/merge.go

@@ -243,7 +243,7 @@ func mergeRefusal(from, to mergeRow) string {
 	case from.kind == string(protocol.KindContainer):
 		return model.ReasonMergeContainer
 	case from.self || to.self:
-		return model.ReasonSelf
+		return model.ReasonMergeSelf
 	}
 	return ""
 }