added __eq__ operation on vcs Repository objects

- eq compare if objects are same class and have the same path
- fixes some issues introduced after @LazyProperty was removed from scm_instance

rhodecode/lib/vcs/backends/base.py

@@ -80,6 +80,10 b' class BaseRepository(object):'
     def __len__(self):
         return self.count()
 
+    def __eq__(self, other):
+        same_instance = isinstance(other, self.__class__)
+        return same_instance and getattr(other, 'path', None) == self.path
+
     @LazyProperty
     def alias(self):
         for k, v in settings.BACKENDS.items():

rhodecode/tests/vcs/test_repository.py

@@ -31,6 +31,19 b' class RepositoryBaseTest(BackendTestMixi'
         self.assertEqual(self.repo.get_user_email(TEST_USER_CONFIG_FILE),
             '[e-mail]')
 
+    def test_repo_equality(self):
+        self.assertTrue(self.repo == self.repo)
+
+    def test_repo_equality_broken_object(self):
+        import copy
+        _repo = copy.copy(self.repo)
+        delattr(_repo, 'path')
+        self.assertTrue(self.repo != _repo)
+
+    def test_repo_equality_other_object(self):
+        class dummy(object):
+            path = self.repo.path
+        self.assertTrue(self.repo != dummy())
 
 
 class RepositoryGetDiffTest(BackendTestMixin):