Reintroduce repo caching

weblate/trans/tests/test_models.py

@@ -44,6 +44,11 @@ class RepoTestCase(TestCase):
             if os.path.exists(test_dir):
                 shutil.rmtree(test_dir)
 
+        # Path where to clone remote repo for tests
+        self.base_repo_path = os.path.join(
+            settings.GIT_ROOT,
+            'test-base-repo.git'
+        )
         # Repository on which tests will be performed
         self.repo_path = os.path.join(
             settings.GIT_ROOT,
@@ -53,6 +58,14 @@ class RepoTestCase(TestCase):
         # Git command wrapper
         cmd = git.Git()
 
+        # Clone repo for testing
+        if not os.path.exists(self.base_repo_path):
+            cmd.clone(
+                '--bare',
+                'git://github.com/nijel/weblate-test.git',
+                self.base_repo_path
+            )
+
         # Remove possibly existing directory
         if os.path.exists(self.repo_path):
             shutil.rmtree(self.repo_path)
@@ -60,6 +73,7 @@ class RepoTestCase(TestCase):
         # Clone copy for the test
         cmd.clone(
             '--bare',
+            '--reference', self.base_repo_path,
             'git://github.com/nijel/weblate-test.git',
             self.repo_path
         )