Fix broken local golang repos

pre_commit/store.py

@@ -156,6 +156,21 @@ class Store(object):
     def make_local(self, deps):
         def make_local_strategy(directory):
             copy_tree_to_path(resource_filename('empty_template'), directory)
+
+            env = no_git_env()
+            name, email = 'pre-commit', 'asottile+pre-commit@umich.edu'
+            env['GIT_AUTHOR_NAME'] = env['GIT_COMMITTER_NAME'] = name
+            env['GIT_AUTHOR_EMAIL'] = env['GIT_COMMITTER_EMAIL'] = email
+
+            # initialize the git repository so it looks more like cloned repos
+            def _git_cmd(*args):
+                cmd_output('git', '-C', directory, *args, env=env)
+
+            _git_cmd('init', '.')
+            _git_cmd('config', 'remote.origin.url', '<<unknown>>')
+            _git_cmd('add', '.')
+            _git_cmd('commit', '--no-edit', '--no-gpg-sign', '-n', '-minit')
+
         return self._new_repo(
             'local:{}'.format(','.join(sorted(deps))), C.LOCAL_REPO_VERSION,
             make_local_strategy,

tests/repository_test.py

@@ -541,6 +541,24 @@ def test_additional_golang_dependencies_installed(
     assert 'hello' in binaries
 
 
+def test_local_golang_additional_dependencies(store):
+    config = {
+        'repo': 'local',
+        'hooks': [{
+            'id': 'hello',
+            'name': 'hello',
+            'entry': 'hello',
+            'language': 'golang',
+            'additional_dependencies': ['github.com/golang/example/hello'],
+        }],
+    }
+    repo = Repository.create(config, store)
+    (_, hook), = repo.hooks
+    ret = repo.run_hook(hook, ('filename',))
+    assert ret[0] == 0
+    assert _norm_out(ret[1]) == b"Hello, Go examples!\n"
+
+
 def test_reinstall(tempdir_factory, store, log_info_mock):
     path = make_repo(tempdir_factory, 'python_hooks_repo')
     config = make_config_from_repo(path)