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# test_server.py -- Compatibility tests for git server.
# Copyright (C) 2010 Google, Inc.
#
# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
# Dulwich is dual-licensed under the Apache License, Version 2.0 and the GNU
# General Public License as published by the Free Software Foundation; version 2.0
# or (at your option) any later version. You can redistribute it and/or
# modify it under the terms of either of these two licenses.
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# You should have received a copy of the licenses; if not, see
# <http://www.gnu.org/licenses/> for a copy of the GNU General Public License
# and <http://www.apache.org/licenses/LICENSE-2.0> for a copy of the Apache
# License, Version 2.0.
#
"""Compatibility tests between Dulwich and the cgit server.
Warning: these tests should be fairly stable, but when writing/debugging new
tests, deadlocks may freeze the test process such that it cannot be
Ctrl-C'ed. On POSIX systems, you can kill the tests with Ctrl-Z, "kill %".
"""
import os
import shutil
import sys
import tempfile
import threading
from dulwich.object_format import SHA256
from dulwich.objects import Blob, Commit, Tree
from dulwich.repo import Repo
from dulwich.server import DictBackend, TCPGitServer
from .. import skipIf
from .server_utils import NoSideBand64kReceivePackHandler, ServerTests
from .utils import CompatTestCase, require_git_version, run_git_or_fail
@skipIf(sys.platform == "win32", "Broken on windows, with very long fail time.")
class GitServerTestCase(ServerTests, CompatTestCase):
"""Tests for client/server compatibility.
This server test case does not use side-band-64k in git-receive-pack.
"""
protocol = "git"
def _handlers(self):
return {b"git-receive-pack": NoSideBand64kReceivePackHandler}
def _check_server(self, dul_server, repo) -> None:
from dulwich.protocol import Protocol
receive_pack_handler_cls = dul_server.handlers[b"git-receive-pack"]
# Create a handler instance to check capabilities
proto = Protocol(lambda x: b"", lambda x: None)
try:
handler = receive_pack_handler_cls(
dul_server.backend,
[b"/"],
proto,
)
caps = handler.capabilities()
self.assertNotIn(b"side-band-64k", caps)
finally:
proto.close()
def _start_server(self, repo):
backend = DictBackend({b"/": repo})
dul_server = TCPGitServer(backend, b"localhost", 0, handlers=self._handlers())
self._check_server(dul_server, repo)
# Start server in a thread
server_thread = threading.Thread(target=dul_server.serve)
server_thread.daemon = True # Make thread daemon so it dies with main thread
server_thread.start()
# Add cleanup in the correct order - shutdown first, then close
def cleanup_server():
dul_server.shutdown()
# Give thread a moment to exit cleanly before closing socket
server_thread.join(timeout=1.0)
dul_server.server_close()
self.addCleanup(cleanup_server)
self._server = dul_server
_, port = self._server.socket.getsockname()
return port
@skipIf(sys.platform == "win32", "Broken on windows, with very long fail time.")
class GitServerSideBand64kTestCase(GitServerTestCase):
"""Tests for client/server compatibility with side-band-64k support."""
# side-band-64k in git-receive-pack was introduced in git 1.7.0.2
min_git_version = (1, 7, 0, 2)
def setUp(self) -> None:
super().setUp()
# side-band-64k is broken in the windows client.
# https://github.com/msysgit/git/issues/101
# Fix has landed for the 1.9.3 release.
if os.name == "nt":
require_git_version((1, 9, 3))
def _handlers(self) -> None:
return None # default handlers include side-band-64k
def _check_server(self, server, repo) -> None:
from dulwich.protocol import Protocol
receive_pack_handler_cls = server.handlers[b"git-receive-pack"]
# Create a handler instance to check capabilities
proto = Protocol(lambda x: b"", lambda x: None)
try:
handler = receive_pack_handler_cls(
server.backend,
[b"/"],
proto,
)
caps = handler.capabilities()
self.assertIn(b"side-band-64k", caps)
finally:
proto.close()
@skipIf(sys.platform == "win32", "Broken on windows, with very long fail time.")
class GitServerSHA256TestCase(CompatTestCase):
"""Tests for SHA-256 repository server compatibility with git client."""
protocol = "git"
# SHA-256 support was introduced in git 2.29.0
min_git_version = (2, 29, 0)
def setUp(self) -> None:
super().setUp()
require_git_version(self.min_git_version)
def _start_server(self, repo):
backend = DictBackend({b"/": repo})
dul_server = TCPGitServer(backend, b"localhost", 0)
# Start server in a thread
server_thread = threading.Thread(target=dul_server.serve)
server_thread.daemon = True
server_thread.start()
# Add cleanup - shutdown first, then close
def cleanup_server():
dul_server.shutdown()
# Give thread a moment to exit cleanly before closing socket
server_thread.join(timeout=1.0)
dul_server.server_close()
self.addCleanup(cleanup_server)
self._server = dul_server
_, port = self._server.socket.getsockname()
return port
def url(self, port) -> str:
return f"{self.protocol}://localhost:{port}/"
def test_clone_sha256_repo_from_dulwich_server(self) -> None:
"""Test that git client can clone SHA-256 repo from dulwich server."""
# Create SHA-256 repository with dulwich
repo_path = tempfile.mkdtemp()
self.addCleanup(shutil.rmtree, repo_path)
source_repo = Repo.init(repo_path, mkdir=False, object_format="sha256")
self.addCleanup(source_repo.close)
# Create test content
blob = Blob.from_string(b"Test SHA-256 content from dulwich server")
tree = Tree()
tree.add(b"test.txt", 0o100644, blob.get_id(SHA256))
commit = Commit()
commit.tree = tree.get_id(SHA256)
commit.author = commit.committer = b"Test User <test@example.com>"
commit.commit_time = commit.author_time = 1234567890
commit.commit_timezone = commit.author_timezone = 0
commit.message = b"Test SHA-256 commit"
# Add objects to repo
source_repo.object_store.add_object(blob)
source_repo.object_store.add_object(tree)
source_repo.object_store.add_object(commit)
# Set master ref
source_repo.refs[b"refs/heads/master"] = commit.get_id(SHA256)
# Start dulwich server
port = self._start_server(source_repo)
# Clone with git client
clone_path = tempfile.mkdtemp()
self.addCleanup(shutil.rmtree, clone_path)
clone_dir = os.path.join(clone_path, "cloned_repo")
run_git_or_fail(["clone", self.url(port), clone_dir], cwd=clone_path)
# Verify cloned repo is SHA-256
cloned_repo = Repo(clone_dir)
self.addCleanup(cloned_repo.close)
self.assertEqual(cloned_repo.object_format, SHA256)
# Verify object format config
output = run_git_or_fail(
["config", "--get", "extensions.objectformat"], cwd=clone_dir
)
self.assertEqual(output.strip(), b"sha256")
# Verify commit was cloned
cloned_head = cloned_repo.refs[b"refs/heads/master"]
self.assertEqual(len(cloned_head), 64) # SHA-256 length
self.assertEqual(cloned_head, commit.get_id(SHA256))
# Verify git can read the commit
log_output = run_git_or_fail(["log", "--format=%s", "-n", "1"], cwd=clone_dir)
self.assertEqual(log_output.strip(), b"Test SHA-256 commit")
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