Block separate git directories during clone - #2210
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Pull request overview
This PR addresses GHSA-8mcc-hrx5-hvxc by treating git clone --separate-git-dir (and its kwarg form separate_git_dir) as an unsafe option unless allow_unsafe_options=True, aligning clone behavior with the existing init guard and the documented unsafe-options contract.
Changes:
- Added
--separate-git-dirtoRepo.unsafe_git_clone_optionsso clone operations block separate git directories by default. - Updated submodule clone internals to continue using
separate_git_dirsafely when needed while still enforcing the unsafe-options denylist for caller-supplied options. - Expanded clone-related tests to cover the new unsafe option (multi-options and kwargs) and adjusted a submodule test to explicitly allow unsafe options when intentionally using
separate_git_dir.
Reviewed changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.
| File | Description |
|---|---|
git/repo/base.py |
Adds --separate-git-dir to the clone unsafe-option denylist. |
git/objects/submodule/base.py |
Ensures submodule cloning can still use separate_git_dir internally while validating caller-provided options. |
test/test_clone.py |
Adds regression cases asserting clone/clone_from reject --separate-git-dir and separate_git_dir by default. |
test/test_submodule.py |
Updates a test to explicitly allow unsafe options when using separate_git_dir, keeping focus on submodule-name validation. |
Suppressed comments (2)
test/test_clone.py:264
- To ensure long-option abbreviations are also blocked for
--separate-git-dir, add an abbreviated spelling to this unsafemulti_optionslist.
"--config=protocol.ext.allow=always",
"-c protocol.ext.allow=always",
"-cprotocol.ext.allow=always",
"-vcprotocol.ext.allow=always",
f"--separate-git-dir={tmp_dir / 'git-dir'}",
]
test/test_clone.py:277
- This kwargs-based unsafe-options test should also cover abbreviated keyword spellings for
separate_git_dir(e.g.,separate_git_di) so the clone_from path matches the clone path coverage.
{"upload_pack": f"touch {tmp_file}"},
{"u": f"touch {tmp_file}"},
{"config": "protocol.ext.allow=always"},
{"c": "protocol.ext.allow=always"},
{"separate_git_dir": tmp_dir / "git-dir"},
]
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<!-- agent --> Repo.clone() and Repo.clone_from() did not reject the clone option that redirects repository metadata to a caller-controlled path (GHSA-8mcc-hrx5-hvxc). Regression coverage exercises both keyword and multi-option input through both public clone APIs. Add the option to the existing clone denylist, matching Repo.init() and the documented allow_unsafe_options contract. Git itself registers The Python package and Alpine test workflows failed across the submodule suite because GitPython internally supplies --separate-git-dir when creating modern submodule layouts. The new public clone guard correctly rejected that option, but could not distinguish the library-generated path from caller input. Validate caller-provided keyword and multi-options before adding the library-controlled metadata path, then explicitly allow the resulting trusted clone invocation. This preserves rejection of unsafe clone_multi_options while restoring normal submodule creation. Update the one test that intentionally invokes Repo.clone_from() with its own separate git directory to opt in explicitly. Assisted-by: GPT 5.6 Co-authored-by: GPT 5.6 <codex@openai.com> Assisted-by: GPT 5.6 Co-authored-by: GPT 5.6 <codex@openai.com>
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Tasks
This section is for Byron only. Models continuing this PR must not add, remove, check, uncheck, rename, or reorder checkboxes here.
Everything below this line was generated by Codex GPT-5.
Created by Codex on behalf of Byron. Byron will review before this is ready to merge.
Advisory
https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-8mcc-hrx5-hvxc
GHSA-8mcc-hrx5-hvxc reports that clone operations do not classify
--separate-git-diras unsafe. This change adds it to the existing clone option denylist, matching the init guard and the documentedallow_unsafe_optionscontract.Advisory summary
Validation
test/test_clone.py: 21 passed, 1 skippedRepo.clone()andRepo.clone_from(), through keyword and multi-option inputs.builtin/clone.cregisters the option andt/t5601-clone.shverifies redirected metadata behavior.